./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix022_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix022_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix022_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix022_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-04 14:54:02,243 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 14:54:02,323 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 14:54:02,329 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 14:54:02,330 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 14:54:02,358 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 14:54:02,361 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 14:54:02,362 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 14:54:02,362 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 14:54:02,368 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 14:54:02,368 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 14:54:02,369 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 14:54:02,370 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 14:54:02,371 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 14:54:02,371 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 14:54:02,372 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 14:54:02,372 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 14:54:02,372 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 14:54:02,372 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 14:54:02,373 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 14:54:02,373 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 14:54:02,373 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 14:54:02,374 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 14:54:02,374 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 14:54:02,374 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 14:54:02,374 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 14:54:02,375 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 14:54:02,375 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 14:54:02,375 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 14:54:02,376 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 14:54:02,377 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 14:54:02,377 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 14:54:02,377 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 14:54:02,377 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 14:54:02,377 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 14:54:02,378 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 14:54:02,378 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 14:54:02,378 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 14:54:02,378 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 14:54:02,378 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 14:54:02,379 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 14:54:02,379 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 14:54:02,379 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 14:54:02,379 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 14:54:02,692 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 14:54:02,710 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 14:54:02,712 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 14:54:02,713 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 14:54:02,714 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 14:54:02,715 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix022_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-04 14:54:03,864 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 14:54:04,086 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 14:54:04,086 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix022_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-04 14:54:04,101 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/321849b69/de40ee52bcc640ec95ce638597d07dd3/FLAG3a4137477 [2024-06-04 14:54:04,114 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/321849b69/de40ee52bcc640ec95ce638597d07dd3 [2024-06-04 14:54:04,116 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 14:54:04,123 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 14:54:04,124 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix022_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml [2024-06-04 14:54:04,277 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 14:54:04,279 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 14:54:04,281 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 14:54:04,281 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 14:54:04,286 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 14:54:04,287 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 02:54:04" (1/2) ... [2024-06-04 14:54:04,288 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69d2f822 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:54:04, skipping insertion in model container [2024-06-04 14:54:04,288 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 02:54:04" (1/2) ... [2024-06-04 14:54:04,290 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2cabb26e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:54:04, skipping insertion in model container [2024-06-04 14:54:04,290 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:54:04" (2/2) ... [2024-06-04 14:54:04,290 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69d2f822 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:54:04, skipping insertion in model container [2024-06-04 14:54:04,290 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:54:04" (2/2) ... [2024-06-04 14:54:04,290 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 14:54:04,357 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 14:54:04,359 INFO L97 edCorrectnessWitness]: Location invariant before [L814-L814] ((((((((((((((! multithreaded || y$r_buff1_thd2 == (_Bool)0) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$flush_delayed == (_Bool)0) [2024-06-04 14:54:04,359 INFO L97 edCorrectnessWitness]: Location invariant before [L813-L813] ((((((((((((((! multithreaded || y$r_buff1_thd2 == (_Bool)0) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$flush_delayed == (_Bool)0) [2024-06-04 14:54:04,359 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 14:54:04,360 INFO L106 edCorrectnessWitness]: ghost_update [L811-L811] multithreaded = 1; [2024-06-04 14:54:04,408 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 14:54:04,758 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 14:54:04,767 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 14:54:04,926 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 14:54:04,961 INFO L206 MainTranslator]: Completed translation [2024-06-04 14:54:04,962 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:54:04 WrapperNode [2024-06-04 14:54:04,962 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 14:54:04,966 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 14:54:04,966 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 14:54:04,966 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 14:54:04,971 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:54:04" (1/1) ... [2024-06-04 14:54:04,987 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:54:04" (1/1) ... [2024-06-04 14:54:05,024 INFO L138 Inliner]: procedures = 174, calls = 36, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 113 [2024-06-04 14:54:05,024 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 14:54:05,025 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 14:54:05,025 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 14:54:05,025 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 14:54:05,035 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:54:04" (1/1) ... [2024-06-04 14:54:05,035 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:54:04" (1/1) ... [2024-06-04 14:54:05,041 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:54:04" (1/1) ... [2024-06-04 14:54:05,055 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-04 14:54:05,064 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:54:04" (1/1) ... [2024-06-04 14:54:05,064 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:54:04" (1/1) ... [2024-06-04 14:54:05,071 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:54:04" (1/1) ... [2024-06-04 14:54:05,072 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:54:04" (1/1) ... [2024-06-04 14:54:05,074 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:54:04" (1/1) ... [2024-06-04 14:54:05,075 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:54:04" (1/1) ... [2024-06-04 14:54:05,079 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 14:54:05,079 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 14:54:05,079 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 14:54:05,080 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 14:54:05,080 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:54:04" (1/1) ... [2024-06-04 14:54:05,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 14:54:05,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 14:54:05,122 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-04 14:54:05,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-04 14:54:05,161 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 14:54:05,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 14:54:05,163 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 14:54:05,163 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 14:54:05,163 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 14:54:05,164 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 14:54:05,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 14:54:05,164 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 14:54:05,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 14:54:05,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 14:54:05,166 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 14:54:05,312 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 14:54:05,318 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 14:54:05,737 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 14:54:05,737 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 14:54:05,902 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 14:54:05,903 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 14:54:05,905 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 02:54:05 BoogieIcfgContainer [2024-06-04 14:54:05,905 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 14:54:05,909 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 14:54:05,909 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 14:54:05,912 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 14:54:05,913 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 02:54:04" (1/4) ... [2024-06-04 14:54:05,915 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d7c72d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 02:54:05, skipping insertion in model container [2024-06-04 14:54:05,915 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:54:04" (2/4) ... [2024-06-04 14:54:05,916 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d7c72d7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 02:54:05, skipping insertion in model container [2024-06-04 14:54:05,916 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:54:04" (3/4) ... [2024-06-04 14:54:05,921 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d7c72d7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 02:54:05, skipping insertion in model container [2024-06-04 14:54:05,921 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 02:54:05" (4/4) ... [2024-06-04 14:54:05,922 INFO L112 eAbstractionObserver]: Analyzing ICFG mix022_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-04 14:54:05,936 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 14:54:05,936 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-04 14:54:05,936 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 14:54:05,975 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 14:54:06,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 31 transitions, 70 flow [2024-06-04 14:54:06,046 INFO L124 PetriNetUnfolderBase]: 0/29 cut-off events. [2024-06-04 14:54:06,046 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 14:54:06,048 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 40 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. [2024-06-04 14:54:06,048 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 31 transitions, 70 flow [2024-06-04 14:54:06,052 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 23 transitions, 52 flow [2024-06-04 14:54:06,066 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 14:54:06,073 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;@322c5a61, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 14:54:06,073 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-04 14:54:06,077 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 14:54:06,077 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 14:54:06,077 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 14:54:06,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:06,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 14:54:06,079 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)] === [2024-06-04 14:54:06,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:06,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1505849308, now seen corresponding path program 1 times [2024-06-04 14:54:06,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:06,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378366824] [2024-06-04 14:54:06,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:06,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:06,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:07,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:07,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:07,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378366824] [2024-06-04 14:54:07,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378366824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:07,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:07,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 14:54:07,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194832907] [2024-06-04 14:54:07,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:07,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 14:54:07,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:07,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 14:54:07,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 14:54:07,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-04 14:54:07,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:07,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:07,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-04 14:54:07,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:07,290 INFO L124 PetriNetUnfolderBase]: 162/307 cut-off events. [2024-06-04 14:54:07,290 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-06-04 14:54:07,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 620 conditions, 307 events. 162/307 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1113 event pairs, 97 based on Foata normal form. 1/301 useless extension candidates. Maximal degree in co-relation 606. Up to 288 conditions per place. [2024-06-04 14:54:07,297 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 23 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2024-06-04 14:54:07,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 29 transitions, 119 flow [2024-06-04 14:54:07,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 14:54:07,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 14:54:07,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 52 transitions. [2024-06-04 14:54:07,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5591397849462365 [2024-06-04 14:54:07,311 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 52 flow. Second operand 3 states and 52 transitions. [2024-06-04 14:54:07,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 29 transitions, 119 flow [2024-06-04 14:54:07,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 29 transitions, 116 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-04 14:54:07,316 INFO L231 Difference]: Finished difference. Result has 31 places, 25 transitions, 71 flow [2024-06-04 14:54:07,318 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} [2024-06-04 14:54:07,321 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2024-06-04 14:54:07,321 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 25 transitions, 71 flow [2024-06-04 14:54:07,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:07,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:07,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:07,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 14:54:07,323 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)] === [2024-06-04 14:54:07,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:07,324 INFO L85 PathProgramCache]: Analyzing trace with hash -282759621, now seen corresponding path program 1 times [2024-06-04 14:54:07,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:07,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603475230] [2024-06-04 14:54:07,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:07,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:07,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:07,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:07,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:07,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603475230] [2024-06-04 14:54:07,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603475230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:07,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:07,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 14:54:07,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751536820] [2024-06-04 14:54:07,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:07,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 14:54:07,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:07,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 14:54:07,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-04 14:54:07,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-04 14:54:07,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 25 transitions, 71 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:07,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:07,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-04 14:54:07,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:08,125 INFO L124 PetriNetUnfolderBase]: 159/304 cut-off events. [2024-06-04 14:54:08,126 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2024-06-04 14:54:08,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 694 conditions, 304 events. 159/304 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1089 event pairs, 79 based on Foata normal form. 2/306 useless extension candidates. Maximal degree in co-relation 679. Up to 274 conditions per place. [2024-06-04 14:54:08,132 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 27 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2024-06-04 14:54:08,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 35 transitions, 161 flow [2024-06-04 14:54:08,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 14:54:08,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 14:54:08,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 66 transitions. [2024-06-04 14:54:08,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532258064516129 [2024-06-04 14:54:08,135 INFO L175 Difference]: Start difference. First operand has 31 places, 25 transitions, 71 flow. Second operand 4 states and 66 transitions. [2024-06-04 14:54:08,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 35 transitions, 161 flow [2024-06-04 14:54:08,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 35 transitions, 158 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 14:54:08,140 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 95 flow [2024-06-04 14:54:08,140 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} [2024-06-04 14:54:08,141 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2024-06-04 14:54:08,141 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 95 flow [2024-06-04 14:54:08,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:08,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:08,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:08,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 14:54:08,142 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)] === [2024-06-04 14:54:08,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:08,145 INFO L85 PathProgramCache]: Analyzing trace with hash -175612531, now seen corresponding path program 1 times [2024-06-04 14:54:08,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:08,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243442964] [2024-06-04 14:54:08,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:08,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:08,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:08,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:08,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:08,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243442964] [2024-06-04 14:54:08,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243442964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:08,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:08,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 14:54:08,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11583080] [2024-06-04 14:54:08,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:08,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 14:54:08,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:08,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 14:54:08,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-04 14:54:08,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-04 14:54:08,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 95 flow. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:08,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:08,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-04 14:54:08,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:08,907 INFO L124 PetriNetUnfolderBase]: 187/339 cut-off events. [2024-06-04 14:54:08,907 INFO L125 PetriNetUnfolderBase]: For 197/197 co-relation queries the response was YES. [2024-06-04 14:54:08,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 869 conditions, 339 events. 187/339 cut-off events. For 197/197 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1188 event pairs, 67 based on Foata normal form. 3/342 useless extension candidates. Maximal degree in co-relation 852. Up to 293 conditions per place. [2024-06-04 14:54:08,910 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 36 selfloop transitions, 11 changer transitions 0/49 dead transitions. [2024-06-04 14:54:08,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 49 transitions, 255 flow [2024-06-04 14:54:08,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:54:08,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:54:08,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 82 transitions. [2024-06-04 14:54:08,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5290322580645161 [2024-06-04 14:54:08,915 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 95 flow. Second operand 5 states and 82 transitions. [2024-06-04 14:54:08,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 49 transitions, 255 flow [2024-06-04 14:54:08,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 49 transitions, 246 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-04 14:54:08,918 INFO L231 Difference]: Finished difference. Result has 39 places, 35 transitions, 162 flow [2024-06-04 14:54:08,919 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=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=162, PETRI_PLACES=39, PETRI_TRANSITIONS=35} [2024-06-04 14:54:08,920 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 9 predicate places. [2024-06-04 14:54:08,920 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 35 transitions, 162 flow [2024-06-04 14:54:08,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:08,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:08,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:08,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 14:54:08,922 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)] === [2024-06-04 14:54:08,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:08,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1149020006, now seen corresponding path program 1 times [2024-06-04 14:54:08,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:08,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628854941] [2024-06-04 14:54:08,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:08,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:08,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:09,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:09,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:09,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628854941] [2024-06-04 14:54:09,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628854941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:09,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:09,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:54:09,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101718800] [2024-06-04 14:54:09,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:09,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:54:09,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:09,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:54:09,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:54:09,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-04 14:54:09,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 162 flow. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:09,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:09,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-04 14:54:09,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:09,967 INFO L124 PetriNetUnfolderBase]: 188/341 cut-off events. [2024-06-04 14:54:09,967 INFO L125 PetriNetUnfolderBase]: For 417/417 co-relation queries the response was YES. [2024-06-04 14:54:09,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1046 conditions, 341 events. 188/341 cut-off events. For 417/417 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1198 event pairs, 46 based on Foata normal form. 3/344 useless extension candidates. Maximal degree in co-relation 1026. Up to 282 conditions per place. [2024-06-04 14:54:09,970 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 40 selfloop transitions, 14 changer transitions 0/56 dead transitions. [2024-06-04 14:54:09,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 56 transitions, 340 flow [2024-06-04 14:54:09,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:54:09,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:54:09,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-04 14:54:09,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5161290322580645 [2024-06-04 14:54:09,972 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 162 flow. Second operand 6 states and 96 transitions. [2024-06-04 14:54:09,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 56 transitions, 340 flow [2024-06-04 14:54:09,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 56 transitions, 336 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-04 14:54:09,981 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 214 flow [2024-06-04 14:54:09,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=214, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-04 14:54:09,983 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 15 predicate places. [2024-06-04 14:54:09,984 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 214 flow [2024-06-04 14:54:09,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:09,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:09,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:09,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 14:54:09,985 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 14:54:09,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:09,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1260475274, now seen corresponding path program 1 times [2024-06-04 14:54:09,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:09,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297624577] [2024-06-04 14:54:09,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:09,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:10,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:10,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:10,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:10,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297624577] [2024-06-04 14:54:10,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297624577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:10,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:10,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:54:10,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789099978] [2024-06-04 14:54:10,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:10,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:54:10,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:10,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:54:10,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:54:10,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-04 14:54:10,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 214 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 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) [2024-06-04 14:54:10,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:10,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-04 14:54:10,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:11,097 INFO L124 PetriNetUnfolderBase]: 189/344 cut-off events. [2024-06-04 14:54:11,097 INFO L125 PetriNetUnfolderBase]: For 640/640 co-relation queries the response was YES. [2024-06-04 14:54:11,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1179 conditions, 344 events. 189/344 cut-off events. For 640/640 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1218 event pairs, 24 based on Foata normal form. 6/350 useless extension candidates. Maximal degree in co-relation 1156. Up to 259 conditions per place. [2024-06-04 14:54:11,100 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 40 selfloop transitions, 16 changer transitions 0/58 dead transitions. [2024-06-04 14:54:11,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 58 transitions, 386 flow [2024-06-04 14:54:11,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:54:11,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:54:11,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 105 transitions. [2024-06-04 14:54:11,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4838709677419355 [2024-06-04 14:54:11,102 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 214 flow. Second operand 7 states and 105 transitions. [2024-06-04 14:54:11,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 58 transitions, 386 flow [2024-06-04 14:54:11,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 58 transitions, 354 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-04 14:54:11,105 INFO L231 Difference]: Finished difference. Result has 47 places, 38 transitions, 217 flow [2024-06-04 14:54:11,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=217, PETRI_PLACES=47, PETRI_TRANSITIONS=38} [2024-06-04 14:54:11,106 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 17 predicate places. [2024-06-04 14:54:11,106 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 38 transitions, 217 flow [2024-06-04 14:54:11,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 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) [2024-06-04 14:54:11,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:11,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:11,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 14:54:11,107 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-04 14:54:11,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:11,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1934851801, now seen corresponding path program 1 times [2024-06-04 14:54:11,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:11,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303633978] [2024-06-04 14:54:11,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:11,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:11,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:11,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:11,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:11,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303633978] [2024-06-04 14:54:11,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303633978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:11,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:11,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:54:11,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037595601] [2024-06-04 14:54:11,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:11,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:54:11,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:11,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:54:11,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:54:11,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:54:11,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 38 transitions, 217 flow. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:11,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:11,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:54:11,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:11,848 INFO L124 PetriNetUnfolderBase]: 187/341 cut-off events. [2024-06-04 14:54:11,849 INFO L125 PetriNetUnfolderBase]: For 747/747 co-relation queries the response was YES. [2024-06-04 14:54:11,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1226 conditions, 341 events. 187/341 cut-off events. For 747/747 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1194 event pairs, 47 based on Foata normal form. 1/342 useless extension candidates. Maximal degree in co-relation 1202. Up to 329 conditions per place. [2024-06-04 14:54:11,851 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 35 selfloop transitions, 6 changer transitions 0/43 dead transitions. [2024-06-04 14:54:11,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 43 transitions, 311 flow [2024-06-04 14:54:11,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:54:11,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:54:11,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 60 transitions. [2024-06-04 14:54:11,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-04 14:54:11,853 INFO L175 Difference]: Start difference. First operand has 47 places, 38 transitions, 217 flow. Second operand 5 states and 60 transitions. [2024-06-04 14:54:11,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 43 transitions, 311 flow [2024-06-04 14:54:11,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 43 transitions, 270 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-04 14:54:11,856 INFO L231 Difference]: Finished difference. Result has 47 places, 38 transitions, 193 flow [2024-06-04 14:54:11,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=193, PETRI_PLACES=47, PETRI_TRANSITIONS=38} [2024-06-04 14:54:11,857 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 17 predicate places. [2024-06-04 14:54:11,857 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 38 transitions, 193 flow [2024-06-04 14:54:11,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:11,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:11,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:11,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 14:54:11,858 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)] === [2024-06-04 14:54:11,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:11,858 INFO L85 PathProgramCache]: Analyzing trace with hash 137115187, now seen corresponding path program 1 times [2024-06-04 14:54:11,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:11,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623220724] [2024-06-04 14:54:11,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:11,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:11,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:12,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:12,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:12,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623220724] [2024-06-04 14:54:12,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623220724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:12,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:12,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:54:12,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85779233] [2024-06-04 14:54:12,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:12,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:54:12,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:12,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:54:12,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:54:12,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:54:12,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 38 transitions, 193 flow. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:12,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:12,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:54:12,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:12,765 INFO L124 PetriNetUnfolderBase]: 181/332 cut-off events. [2024-06-04 14:54:12,766 INFO L125 PetriNetUnfolderBase]: For 877/877 co-relation queries the response was YES. [2024-06-04 14:54:12,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1154 conditions, 332 events. 181/332 cut-off events. For 877/877 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1134 event pairs, 44 based on Foata normal form. 3/335 useless extension candidates. Maximal degree in co-relation 1128. Up to 311 conditions per place. [2024-06-04 14:54:12,768 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 38 selfloop transitions, 8 changer transitions 0/48 dead transitions. [2024-06-04 14:54:12,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 48 transitions, 311 flow [2024-06-04 14:54:12,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:54:12,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:54:12,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 71 transitions. [2024-06-04 14:54:12,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3817204301075269 [2024-06-04 14:54:12,769 INFO L175 Difference]: Start difference. First operand has 47 places, 38 transitions, 193 flow. Second operand 6 states and 71 transitions. [2024-06-04 14:54:12,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 48 transitions, 311 flow [2024-06-04 14:54:12,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 48 transitions, 296 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-04 14:54:12,772 INFO L231 Difference]: Finished difference. Result has 49 places, 40 transitions, 211 flow [2024-06-04 14:54:12,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=211, PETRI_PLACES=49, PETRI_TRANSITIONS=40} [2024-06-04 14:54:12,773 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 19 predicate places. [2024-06-04 14:54:12,773 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 40 transitions, 211 flow [2024-06-04 14:54:12,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:12,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:12,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:12,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 14:54:12,774 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)] === [2024-06-04 14:54:12,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:12,774 INFO L85 PathProgramCache]: Analyzing trace with hash -514451052, now seen corresponding path program 1 times [2024-06-04 14:54:12,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:12,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963338420] [2024-06-04 14:54:12,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:12,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:12,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:13,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:13,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:13,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963338420] [2024-06-04 14:54:13,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963338420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:13,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:13,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:54:13,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294444807] [2024-06-04 14:54:13,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:13,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:54:13,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:13,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:54:13,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:54:13,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:54:13,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 40 transitions, 211 flow. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:13,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:13,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:54:13,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:13,553 INFO L124 PetriNetUnfolderBase]: 182/334 cut-off events. [2024-06-04 14:54:13,554 INFO L125 PetriNetUnfolderBase]: For 1009/1009 co-relation queries the response was YES. [2024-06-04 14:54:13,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1226 conditions, 334 events. 182/334 cut-off events. For 1009/1009 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1159 event pairs, 43 based on Foata normal form. 2/336 useless extension candidates. Maximal degree in co-relation 1200. Up to 288 conditions per place. [2024-06-04 14:54:13,557 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 37 selfloop transitions, 13 changer transitions 0/52 dead transitions. [2024-06-04 14:54:13,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 52 transitions, 362 flow [2024-06-04 14:54:13,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:54:13,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:54:13,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 77 transitions. [2024-06-04 14:54:13,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41397849462365593 [2024-06-04 14:54:13,558 INFO L175 Difference]: Start difference. First operand has 49 places, 40 transitions, 211 flow. Second operand 6 states and 77 transitions. [2024-06-04 14:54:13,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 52 transitions, 362 flow [2024-06-04 14:54:13,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 52 transitions, 345 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-04 14:54:13,563 INFO L231 Difference]: Finished difference. Result has 51 places, 42 transitions, 242 flow [2024-06-04 14:54:13,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=242, PETRI_PLACES=51, PETRI_TRANSITIONS=42} [2024-06-04 14:54:13,565 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 21 predicate places. [2024-06-04 14:54:13,566 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 42 transitions, 242 flow [2024-06-04 14:54:13,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:13,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:13,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:13,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 14:54:13,567 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)] === [2024-06-04 14:54:13,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:13,567 INFO L85 PathProgramCache]: Analyzing trace with hash 328281990, now seen corresponding path program 2 times [2024-06-04 14:54:13,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:13,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224787139] [2024-06-04 14:54:13,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:13,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:13,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:14,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:14,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:14,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224787139] [2024-06-04 14:54:14,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224787139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:14,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:14,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:54:14,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948138882] [2024-06-04 14:54:14,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:14,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:54:14,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:14,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:54:14,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:54:14,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:54:14,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 42 transitions, 242 flow. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:14,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:14,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:54:14,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:14,377 INFO L124 PetriNetUnfolderBase]: 177/324 cut-off events. [2024-06-04 14:54:14,377 INFO L125 PetriNetUnfolderBase]: For 1164/1164 co-relation queries the response was YES. [2024-06-04 14:54:14,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1228 conditions, 324 events. 177/324 cut-off events. For 1164/1164 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1095 event pairs, 42 based on Foata normal form. 1/325 useless extension candidates. Maximal degree in co-relation 1201. Up to 309 conditions per place. [2024-06-04 14:54:14,380 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 38 selfloop transitions, 8 changer transitions 0/48 dead transitions. [2024-06-04 14:54:14,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 48 transitions, 348 flow [2024-06-04 14:54:14,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:54:14,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:54:14,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 69 transitions. [2024-06-04 14:54:14,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-04 14:54:14,381 INFO L175 Difference]: Start difference. First operand has 51 places, 42 transitions, 242 flow. Second operand 6 states and 69 transitions. [2024-06-04 14:54:14,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 48 transitions, 348 flow [2024-06-04 14:54:14,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 48 transitions, 333 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-04 14:54:14,384 INFO L231 Difference]: Finished difference. Result has 54 places, 42 transitions, 248 flow [2024-06-04 14:54:14,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=248, PETRI_PLACES=54, PETRI_TRANSITIONS=42} [2024-06-04 14:54:14,385 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 24 predicate places. [2024-06-04 14:54:14,385 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 42 transitions, 248 flow [2024-06-04 14:54:14,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:14,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:14,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:14,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 14:54:14,386 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)] === [2024-06-04 14:54:14,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:14,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1553636556, now seen corresponding path program 1 times [2024-06-04 14:54:14,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:14,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188113477] [2024-06-04 14:54:14,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:14,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:14,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:14,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:14,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:14,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188113477] [2024-06-04 14:54:14,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188113477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:14,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:14,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:54:14,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365165437] [2024-06-04 14:54:14,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:14,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:54:15,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:15,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:54:15,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:54:15,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:54:15,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 42 transitions, 248 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:15,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:15,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:54:15,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:15,331 INFO L124 PetriNetUnfolderBase]: 215/386 cut-off events. [2024-06-04 14:54:15,331 INFO L125 PetriNetUnfolderBase]: For 1838/1838 co-relation queries the response was YES. [2024-06-04 14:54:15,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1463 conditions, 386 events. 215/386 cut-off events. For 1838/1838 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1391 event pairs, 50 based on Foata normal form. 6/392 useless extension candidates. Maximal degree in co-relation 1435. Up to 276 conditions per place. [2024-06-04 14:54:15,346 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 46 selfloop transitions, 17 changer transitions 0/65 dead transitions. [2024-06-04 14:54:15,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 65 transitions, 460 flow [2024-06-04 14:54:15,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:54:15,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:54:15,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 93 transitions. [2024-06-04 14:54:15,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-04 14:54:15,348 INFO L175 Difference]: Start difference. First operand has 54 places, 42 transitions, 248 flow. Second operand 7 states and 93 transitions. [2024-06-04 14:54:15,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 65 transitions, 460 flow [2024-06-04 14:54:15,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 65 transitions, 426 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-04 14:54:15,353 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 297 flow [2024-06-04 14:54:15,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=297, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-06-04 14:54:15,355 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 26 predicate places. [2024-06-04 14:54:15,357 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 297 flow [2024-06-04 14:54:15,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:15,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:15,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:15,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 14:54:15,358 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)] === [2024-06-04 14:54:15,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:15,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1587045232, now seen corresponding path program 2 times [2024-06-04 14:54:15,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:15,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020107510] [2024-06-04 14:54:15,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:15,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:15,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:15,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:15,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:15,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020107510] [2024-06-04 14:54:15,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020107510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:15,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:15,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:54:15,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858828245] [2024-06-04 14:54:15,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:15,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:54:15,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:15,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:54:15,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:54:16,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:54:16,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 297 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:16,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:16,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:54:16,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:16,264 INFO L124 PetriNetUnfolderBase]: 224/401 cut-off events. [2024-06-04 14:54:16,265 INFO L125 PetriNetUnfolderBase]: For 2087/2087 co-relation queries the response was YES. [2024-06-04 14:54:16,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1677 conditions, 401 events. 224/401 cut-off events. For 2087/2087 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1441 event pairs, 52 based on Foata normal form. 3/404 useless extension candidates. Maximal degree in co-relation 1647. Up to 377 conditions per place. [2024-06-04 14:54:16,268 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 48 selfloop transitions, 10 changer transitions 0/60 dead transitions. [2024-06-04 14:54:16,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 60 transitions, 449 flow [2024-06-04 14:54:16,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:54:16,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:54:16,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 80 transitions. [2024-06-04 14:54:16,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3686635944700461 [2024-06-04 14:54:16,269 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 297 flow. Second operand 7 states and 80 transitions. [2024-06-04 14:54:16,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 60 transitions, 449 flow [2024-06-04 14:54:16,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 60 transitions, 434 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-04 14:54:16,274 INFO L231 Difference]: Finished difference. Result has 61 places, 51 transitions, 325 flow [2024-06-04 14:54:16,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=325, PETRI_PLACES=61, PETRI_TRANSITIONS=51} [2024-06-04 14:54:16,275 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 31 predicate places. [2024-06-04 14:54:16,275 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 51 transitions, 325 flow [2024-06-04 14:54:16,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:16,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:16,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:16,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 14:54:16,276 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)] === [2024-06-04 14:54:16,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:16,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1198929262, now seen corresponding path program 3 times [2024-06-04 14:54:16,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:16,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674660038] [2024-06-04 14:54:16,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:16,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:16,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:16,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:16,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:16,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674660038] [2024-06-04 14:54:16,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674660038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:16,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:16,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:54:16,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405639437] [2024-06-04 14:54:16,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:16,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:54:16,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:16,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:54:16,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:54:17,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:54:17,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 51 transitions, 325 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:17,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:17,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:54:17,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:17,247 INFO L124 PetriNetUnfolderBase]: 218/392 cut-off events. [2024-06-04 14:54:17,247 INFO L125 PetriNetUnfolderBase]: For 2404/2404 co-relation queries the response was YES. [2024-06-04 14:54:17,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1679 conditions, 392 events. 218/392 cut-off events. For 2404/2404 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1409 event pairs, 46 based on Foata normal form. 3/395 useless extension candidates. Maximal degree in co-relation 1646. Up to 356 conditions per place. [2024-06-04 14:54:17,250 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 49 selfloop transitions, 13 changer transitions 0/64 dead transitions. [2024-06-04 14:54:17,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 64 transitions, 495 flow [2024-06-04 14:54:17,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:54:17,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:54:17,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 84 transitions. [2024-06-04 14:54:17,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-04 14:54:17,252 INFO L175 Difference]: Start difference. First operand has 61 places, 51 transitions, 325 flow. Second operand 7 states and 84 transitions. [2024-06-04 14:54:17,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 64 transitions, 495 flow [2024-06-04 14:54:17,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 64 transitions, 468 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-04 14:54:17,257 INFO L231 Difference]: Finished difference. Result has 63 places, 53 transitions, 351 flow [2024-06-04 14:54:17,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=351, PETRI_PLACES=63, PETRI_TRANSITIONS=53} [2024-06-04 14:54:17,258 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 33 predicate places. [2024-06-04 14:54:17,258 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 53 transitions, 351 flow [2024-06-04 14:54:17,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:17,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:17,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:17,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 14:54:17,259 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)] === [2024-06-04 14:54:17,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:17,259 INFO L85 PathProgramCache]: Analyzing trace with hash -470005645, now seen corresponding path program 1 times [2024-06-04 14:54:17,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:17,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459807594] [2024-06-04 14:54:17,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:17,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:17,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:18,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:18,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:18,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459807594] [2024-06-04 14:54:18,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459807594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:18,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:18,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:54:18,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728011654] [2024-06-04 14:54:18,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:18,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:54:18,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:18,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:54:18,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:54:18,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:54:18,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 53 transitions, 351 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:18,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:18,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:54:18,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:18,350 INFO L124 PetriNetUnfolderBase]: 221/397 cut-off events. [2024-06-04 14:54:18,350 INFO L125 PetriNetUnfolderBase]: For 2632/2632 co-relation queries the response was YES. [2024-06-04 14:54:18,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1745 conditions, 397 events. 221/397 cut-off events. For 2632/2632 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1432 event pairs, 46 based on Foata normal form. 1/398 useless extension candidates. Maximal degree in co-relation 1712. Up to 334 conditions per place. [2024-06-04 14:54:18,353 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 52 selfloop transitions, 17 changer transitions 0/71 dead transitions. [2024-06-04 14:54:18,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 71 transitions, 571 flow [2024-06-04 14:54:18,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:54:18,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:54:18,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 89 transitions. [2024-06-04 14:54:18,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41013824884792627 [2024-06-04 14:54:18,355 INFO L175 Difference]: Start difference. First operand has 63 places, 53 transitions, 351 flow. Second operand 7 states and 89 transitions. [2024-06-04 14:54:18,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 71 transitions, 571 flow [2024-06-04 14:54:18,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 71 transitions, 536 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-04 14:54:18,360 INFO L231 Difference]: Finished difference. Result has 65 places, 57 transitions, 383 flow [2024-06-04 14:54:18,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=383, PETRI_PLACES=65, PETRI_TRANSITIONS=57} [2024-06-04 14:54:18,361 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 35 predicate places. [2024-06-04 14:54:18,361 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 57 transitions, 383 flow [2024-06-04 14:54:18,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:18,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:18,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:18,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 14:54:18,361 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)] === [2024-06-04 14:54:18,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:18,362 INFO L85 PathProgramCache]: Analyzing trace with hash -469915435, now seen corresponding path program 2 times [2024-06-04 14:54:18,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:18,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855375899] [2024-06-04 14:54:18,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:18,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:18,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:19,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:19,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:19,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855375899] [2024-06-04 14:54:19,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855375899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:19,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:19,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:54:19,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752537683] [2024-06-04 14:54:19,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:19,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:54:19,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:19,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:54:19,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:54:19,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:54:19,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 57 transitions, 383 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:19,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:19,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:54:19,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:19,436 INFO L124 PetriNetUnfolderBase]: 219/394 cut-off events. [2024-06-04 14:54:19,436 INFO L125 PetriNetUnfolderBase]: For 2895/2895 co-relation queries the response was YES. [2024-06-04 14:54:19,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1765 conditions, 394 events. 219/394 cut-off events. For 2895/2895 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1416 event pairs, 46 based on Foata normal form. 1/395 useless extension candidates. Maximal degree in co-relation 1731. Up to 347 conditions per place. [2024-06-04 14:54:19,439 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 50 selfloop transitions, 15 changer transitions 0/67 dead transitions. [2024-06-04 14:54:19,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 67 transitions, 537 flow [2024-06-04 14:54:19,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:54:19,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:54:19,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 85 transitions. [2024-06-04 14:54:19,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391705069124424 [2024-06-04 14:54:19,441 INFO L175 Difference]: Start difference. First operand has 65 places, 57 transitions, 383 flow. Second operand 7 states and 85 transitions. [2024-06-04 14:54:19,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 67 transitions, 537 flow [2024-06-04 14:54:19,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 67 transitions, 512 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-04 14:54:19,446 INFO L231 Difference]: Finished difference. Result has 69 places, 57 transitions, 393 flow [2024-06-04 14:54:19,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=393, PETRI_PLACES=69, PETRI_TRANSITIONS=57} [2024-06-04 14:54:19,447 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 39 predicate places. [2024-06-04 14:54:19,447 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 57 transitions, 393 flow [2024-06-04 14:54:19,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:19,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:19,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:19,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 14:54:19,447 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)] === [2024-06-04 14:54:19,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:19,448 INFO L85 PathProgramCache]: Analyzing trace with hash -466196210, now seen corresponding path program 1 times [2024-06-04 14:54:19,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:19,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020188151] [2024-06-04 14:54:19,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:19,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:19,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:20,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:20,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:20,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020188151] [2024-06-04 14:54:20,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020188151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:20,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:20,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:54:20,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961674507] [2024-06-04 14:54:20,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:20,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:54:20,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:20,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:54:20,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:54:20,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:54:20,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 57 transitions, 393 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:20,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:20,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:54:20,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:20,403 INFO L124 PetriNetUnfolderBase]: 228/409 cut-off events. [2024-06-04 14:54:20,403 INFO L125 PetriNetUnfolderBase]: For 3517/3517 co-relation queries the response was YES. [2024-06-04 14:54:20,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1870 conditions, 409 events. 228/409 cut-off events. For 3517/3517 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1504 event pairs, 45 based on Foata normal form. 3/412 useless extension candidates. Maximal degree in co-relation 1834. Up to 287 conditions per place. [2024-06-04 14:54:20,407 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 53 selfloop transitions, 24 changer transitions 0/79 dead transitions. [2024-06-04 14:54:20,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 79 transitions, 643 flow [2024-06-04 14:54:20,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:54:20,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:54:20,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 98 transitions. [2024-06-04 14:54:20,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2024-06-04 14:54:20,408 INFO L175 Difference]: Start difference. First operand has 69 places, 57 transitions, 393 flow. Second operand 7 states and 98 transitions. [2024-06-04 14:54:20,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 79 transitions, 643 flow [2024-06-04 14:54:20,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 79 transitions, 605 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-04 14:54:20,414 INFO L231 Difference]: Finished difference. Result has 70 places, 59 transitions, 424 flow [2024-06-04 14:54:20,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=424, PETRI_PLACES=70, PETRI_TRANSITIONS=59} [2024-06-04 14:54:20,416 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 40 predicate places. [2024-06-04 14:54:20,416 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 59 transitions, 424 flow [2024-06-04 14:54:20,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:20,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:20,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:20,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 14:54:20,417 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)] === [2024-06-04 14:54:20,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:20,417 INFO L85 PathProgramCache]: Analyzing trace with hash -466190630, now seen corresponding path program 2 times [2024-06-04 14:54:20,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:20,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266805601] [2024-06-04 14:54:20,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:20,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:20,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:21,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:21,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:21,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266805601] [2024-06-04 14:54:21,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266805601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:21,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:21,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:54:21,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261605962] [2024-06-04 14:54:21,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:21,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:54:21,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:21,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:54:21,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:54:21,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:54:21,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 59 transitions, 424 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:21,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:21,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:54:21,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:21,561 INFO L124 PetriNetUnfolderBase]: 237/424 cut-off events. [2024-06-04 14:54:21,561 INFO L125 PetriNetUnfolderBase]: For 4077/4077 co-relation queries the response was YES. [2024-06-04 14:54:21,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2007 conditions, 424 events. 237/424 cut-off events. For 4077/4077 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1566 event pairs, 51 based on Foata normal form. 3/427 useless extension candidates. Maximal degree in co-relation 1970. Up to 295 conditions per place. [2024-06-04 14:54:21,565 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 54 selfloop transitions, 23 changer transitions 0/79 dead transitions. [2024-06-04 14:54:21,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 79 transitions, 674 flow [2024-06-04 14:54:21,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:21,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:21,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 104 transitions. [2024-06-04 14:54:21,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-04 14:54:21,567 INFO L175 Difference]: Start difference. First operand has 70 places, 59 transitions, 424 flow. Second operand 8 states and 104 transitions. [2024-06-04 14:54:21,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 79 transitions, 674 flow [2024-06-04 14:54:21,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 79 transitions, 614 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-04 14:54:21,574 INFO L231 Difference]: Finished difference. Result has 73 places, 61 transitions, 435 flow [2024-06-04 14:54:21,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=435, PETRI_PLACES=73, PETRI_TRANSITIONS=61} [2024-06-04 14:54:21,574 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 43 predicate places. [2024-06-04 14:54:21,575 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 61 transitions, 435 flow [2024-06-04 14:54:21,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:21,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:21,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:21,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 14:54:21,576 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)] === [2024-06-04 14:54:21,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:21,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1953770391, now seen corresponding path program 1 times [2024-06-04 14:54:21,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:21,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824999501] [2024-06-04 14:54:21,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:21,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:21,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:22,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:22,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:22,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824999501] [2024-06-04 14:54:22,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824999501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:22,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:22,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:54:22,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005716093] [2024-06-04 14:54:22,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:22,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:54:22,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:22,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:54:22,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:54:22,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:54:22,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 61 transitions, 435 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:22,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:22,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:54:22,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:22,827 INFO L124 PetriNetUnfolderBase]: 233/418 cut-off events. [2024-06-04 14:54:22,827 INFO L125 PetriNetUnfolderBase]: For 4177/4177 co-relation queries the response was YES. [2024-06-04 14:54:22,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1975 conditions, 418 events. 233/418 cut-off events. For 4177/4177 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1535 event pairs, 45 based on Foata normal form. 2/420 useless extension candidates. Maximal degree in co-relation 1937. Up to 389 conditions per place. [2024-06-04 14:54:22,831 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 59 selfloop transitions, 12 changer transitions 0/73 dead transitions. [2024-06-04 14:54:22,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 73 transitions, 617 flow [2024-06-04 14:54:22,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:22,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:22,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 89 transitions. [2024-06-04 14:54:22,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3588709677419355 [2024-06-04 14:54:22,833 INFO L175 Difference]: Start difference. First operand has 73 places, 61 transitions, 435 flow. Second operand 8 states and 89 transitions. [2024-06-04 14:54:22,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 73 transitions, 617 flow [2024-06-04 14:54:22,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 73 transitions, 579 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-04 14:54:22,841 INFO L231 Difference]: Finished difference. Result has 76 places, 63 transitions, 448 flow [2024-06-04 14:54:22,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=397, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=448, PETRI_PLACES=76, PETRI_TRANSITIONS=63} [2024-06-04 14:54:22,842 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 46 predicate places. [2024-06-04 14:54:22,842 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 63 transitions, 448 flow [2024-06-04 14:54:22,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:22,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:22,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:22,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 14:54:22,843 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)] === [2024-06-04 14:54:22,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:22,843 INFO L85 PathProgramCache]: Analyzing trace with hash 278017642, now seen corresponding path program 3 times [2024-06-04 14:54:22,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:22,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668180196] [2024-06-04 14:54:22,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:22,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:22,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:23,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:23,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:23,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668180196] [2024-06-04 14:54:23,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668180196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:23,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:23,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:54:23,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985640356] [2024-06-04 14:54:23,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:23,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:54:23,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:23,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:54:23,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:54:23,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:54:23,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 63 transitions, 448 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:23,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:23,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:54:23,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:23,920 INFO L124 PetriNetUnfolderBase]: 242/433 cut-off events. [2024-06-04 14:54:23,921 INFO L125 PetriNetUnfolderBase]: For 4765/4765 co-relation queries the response was YES. [2024-06-04 14:54:23,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2034 conditions, 433 events. 242/433 cut-off events. For 4765/4765 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1612 event pairs, 46 based on Foata normal form. 3/436 useless extension candidates. Maximal degree in co-relation 1995. Up to 384 conditions per place. [2024-06-04 14:54:23,925 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 62 selfloop transitions, 15 changer transitions 0/79 dead transitions. [2024-06-04 14:54:23,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 79 transitions, 656 flow [2024-06-04 14:54:23,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:23,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:23,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 95 transitions. [2024-06-04 14:54:23,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38306451612903225 [2024-06-04 14:54:23,927 INFO L175 Difference]: Start difference. First operand has 76 places, 63 transitions, 448 flow. Second operand 8 states and 95 transitions. [2024-06-04 14:54:23,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 79 transitions, 656 flow [2024-06-04 14:54:23,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 79 transitions, 618 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-04 14:54:23,936 INFO L231 Difference]: Finished difference. Result has 78 places, 65 transitions, 467 flow [2024-06-04 14:54:23,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=410, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=467, PETRI_PLACES=78, PETRI_TRANSITIONS=65} [2024-06-04 14:54:23,936 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 48 predicate places. [2024-06-04 14:54:23,937 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 65 transitions, 467 flow [2024-06-04 14:54:23,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:23,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:23,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:23,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 14:54:23,937 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)] === [2024-06-04 14:54:23,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:23,938 INFO L85 PathProgramCache]: Analyzing trace with hash 285369292, now seen corresponding path program 4 times [2024-06-04 14:54:23,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:23,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645538688] [2024-06-04 14:54:23,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:23,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:23,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:24,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:24,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:24,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645538688] [2024-06-04 14:54:24,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645538688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:24,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:24,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:54:24,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558559215] [2024-06-04 14:54:24,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:24,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:54:24,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:24,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:54:24,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:54:24,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:54:24,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 65 transitions, 467 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:24,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:24,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:54:24,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:24,939 INFO L124 PetriNetUnfolderBase]: 236/424 cut-off events. [2024-06-04 14:54:24,939 INFO L125 PetriNetUnfolderBase]: For 4872/4872 co-relation queries the response was YES. [2024-06-04 14:54:24,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1986 conditions, 424 events. 236/424 cut-off events. For 4872/4872 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1580 event pairs, 48 based on Foata normal form. 3/427 useless extension candidates. Maximal degree in co-relation 1946. Up to 387 conditions per place. [2024-06-04 14:54:24,943 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 63 selfloop transitions, 12 changer transitions 0/77 dead transitions. [2024-06-04 14:54:24,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 77 transitions, 647 flow [2024-06-04 14:54:24,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:24,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:24,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 91 transitions. [2024-06-04 14:54:24,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36693548387096775 [2024-06-04 14:54:24,944 INFO L175 Difference]: Start difference. First operand has 78 places, 65 transitions, 467 flow. Second operand 8 states and 91 transitions. [2024-06-04 14:54:24,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 77 transitions, 647 flow [2024-06-04 14:54:24,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 77 transitions, 606 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-04 14:54:24,954 INFO L231 Difference]: Finished difference. Result has 80 places, 65 transitions, 455 flow [2024-06-04 14:54:24,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=455, PETRI_PLACES=80, PETRI_TRANSITIONS=65} [2024-06-04 14:54:24,955 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 50 predicate places. [2024-06-04 14:54:24,955 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 65 transitions, 455 flow [2024-06-04 14:54:24,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:24,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:24,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:24,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 14:54:24,956 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)] === [2024-06-04 14:54:24,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:24,956 INFO L85 PathProgramCache]: Analyzing trace with hash 285646339, now seen corresponding path program 1 times [2024-06-04 14:54:24,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:24,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517640782] [2024-06-04 14:54:24,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:24,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:24,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:26,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:26,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:26,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517640782] [2024-06-04 14:54:26,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517640782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:26,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:26,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:54:26,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356067541] [2024-06-04 14:54:26,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:26,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:54:26,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:26,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:54:26,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:54:26,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:54:26,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 65 transitions, 455 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:26,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:26,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:54:26,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:26,454 INFO L124 PetriNetUnfolderBase]: 233/419 cut-off events. [2024-06-04 14:54:26,454 INFO L125 PetriNetUnfolderBase]: For 4904/4904 co-relation queries the response was YES. [2024-06-04 14:54:26,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1944 conditions, 419 events. 233/419 cut-off events. For 4904/4904 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1541 event pairs, 46 based on Foata normal form. 2/421 useless extension candidates. Maximal degree in co-relation 1903. Up to 392 conditions per place. [2024-06-04 14:54:26,458 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 62 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2024-06-04 14:54:26,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 75 transitions, 623 flow [2024-06-04 14:54:26,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:26,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:26,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 87 transitions. [2024-06-04 14:54:26,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35080645161290325 [2024-06-04 14:54:26,459 INFO L175 Difference]: Start difference. First operand has 80 places, 65 transitions, 455 flow. Second operand 8 states and 87 transitions. [2024-06-04 14:54:26,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 75 transitions, 623 flow [2024-06-04 14:54:26,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 75 transitions, 566 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-04 14:54:26,467 INFO L231 Difference]: Finished difference. Result has 80 places, 65 transitions, 424 flow [2024-06-04 14:54:26,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=424, PETRI_PLACES=80, PETRI_TRANSITIONS=65} [2024-06-04 14:54:26,468 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 50 predicate places. [2024-06-04 14:54:26,468 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 65 transitions, 424 flow [2024-06-04 14:54:26,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:26,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:26,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:26,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 14:54:26,469 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)] === [2024-06-04 14:54:26,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:26,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1485588375, now seen corresponding path program 1 times [2024-06-04 14:54:26,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:26,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972548834] [2024-06-04 14:54:26,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:26,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:26,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:27,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:27,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:27,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972548834] [2024-06-04 14:54:27,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972548834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:27,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:27,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:54:27,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230001787] [2024-06-04 14:54:27,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:27,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:54:27,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:27,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:54:27,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:54:27,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:54:27,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 65 transitions, 424 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:27,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:27,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:54:27,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:27,525 INFO L124 PetriNetUnfolderBase]: 237/427 cut-off events. [2024-06-04 14:54:27,525 INFO L125 PetriNetUnfolderBase]: For 5312/5312 co-relation queries the response was YES. [2024-06-04 14:54:27,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1952 conditions, 427 events. 237/427 cut-off events. For 5312/5312 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1601 event pairs, 33 based on Foata normal form. 2/429 useless extension candidates. Maximal degree in co-relation 1910. Up to 322 conditions per place. [2024-06-04 14:54:27,529 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 61 selfloop transitions, 20 changer transitions 0/83 dead transitions. [2024-06-04 14:54:27,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 83 transitions, 676 flow [2024-06-04 14:54:27,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:27,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:27,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 97 transitions. [2024-06-04 14:54:27,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3911290322580645 [2024-06-04 14:54:27,531 INFO L175 Difference]: Start difference. First operand has 80 places, 65 transitions, 424 flow. Second operand 8 states and 97 transitions. [2024-06-04 14:54:27,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 83 transitions, 676 flow [2024-06-04 14:54:27,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 83 transitions, 646 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-04 14:54:27,543 INFO L231 Difference]: Finished difference. Result has 81 places, 66 transitions, 448 flow [2024-06-04 14:54:27,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=448, PETRI_PLACES=81, PETRI_TRANSITIONS=66} [2024-06-04 14:54:27,544 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 51 predicate places. [2024-06-04 14:54:27,544 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 66 transitions, 448 flow [2024-06-04 14:54:27,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:27,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:27,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:27,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 14:54:27,545 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)] === [2024-06-04 14:54:27,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:27,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1485648949, now seen corresponding path program 1 times [2024-06-04 14:54:27,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:27,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120845588] [2024-06-04 14:54:27,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:27,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:27,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:28,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:28,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:28,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120845588] [2024-06-04 14:54:28,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120845588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:28,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:28,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:54:28,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217908919] [2024-06-04 14:54:28,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:28,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:54:28,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:28,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:54:28,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:54:28,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:54:28,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 66 transitions, 448 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:28,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:28,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:54:28,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:28,585 INFO L124 PetriNetUnfolderBase]: 240/432 cut-off events. [2024-06-04 14:54:28,585 INFO L125 PetriNetUnfolderBase]: For 5606/5606 co-relation queries the response was YES. [2024-06-04 14:54:28,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2012 conditions, 432 events. 240/432 cut-off events. For 5606/5606 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1631 event pairs, 38 based on Foata normal form. 1/433 useless extension candidates. Maximal degree in co-relation 1970. Up to 324 conditions per place. [2024-06-04 14:54:28,588 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 69 selfloop transitions, 23 changer transitions 0/94 dead transitions. [2024-06-04 14:54:28,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 94 transitions, 777 flow [2024-06-04 14:54:28,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:28,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:28,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 101 transitions. [2024-06-04 14:54:28,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40725806451612906 [2024-06-04 14:54:28,590 INFO L175 Difference]: Start difference. First operand has 81 places, 66 transitions, 448 flow. Second operand 8 states and 101 transitions. [2024-06-04 14:54:28,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 94 transitions, 777 flow [2024-06-04 14:54:28,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 94 transitions, 733 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-04 14:54:28,600 INFO L231 Difference]: Finished difference. Result has 85 places, 76 transitions, 529 flow [2024-06-04 14:54:28,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=529, PETRI_PLACES=85, PETRI_TRANSITIONS=76} [2024-06-04 14:54:28,600 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 55 predicate places. [2024-06-04 14:54:28,601 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 76 transitions, 529 flow [2024-06-04 14:54:28,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:28,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:28,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:28,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 14:54:28,601 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)] === [2024-06-04 14:54:28,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:28,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1685272247, now seen corresponding path program 2 times [2024-06-04 14:54:28,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:28,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957153845] [2024-06-04 14:54:28,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:28,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:28,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:29,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:29,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:29,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957153845] [2024-06-04 14:54:29,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957153845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:29,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:29,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:54:29,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063939793] [2024-06-04 14:54:29,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:29,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:54:29,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:29,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:54:29,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:54:29,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:54:29,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 76 transitions, 529 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:29,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:29,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:54:29,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:29,664 INFO L124 PetriNetUnfolderBase]: 244/440 cut-off events. [2024-06-04 14:54:29,664 INFO L125 PetriNetUnfolderBase]: For 6494/6494 co-relation queries the response was YES. [2024-06-04 14:54:29,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2135 conditions, 440 events. 244/440 cut-off events. For 6494/6494 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1675 event pairs, 49 based on Foata normal form. 2/442 useless extension candidates. Maximal degree in co-relation 2091. Up to 372 conditions per place. [2024-06-04 14:54:29,667 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 72 selfloop transitions, 18 changer transitions 0/92 dead transitions. [2024-06-04 14:54:29,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 92 transitions, 752 flow [2024-06-04 14:54:29,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:29,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:29,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 97 transitions. [2024-06-04 14:54:29,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3911290322580645 [2024-06-04 14:54:29,669 INFO L175 Difference]: Start difference. First operand has 85 places, 76 transitions, 529 flow. Second operand 8 states and 97 transitions. [2024-06-04 14:54:29,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 92 transitions, 752 flow [2024-06-04 14:54:29,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 92 transitions, 714 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-04 14:54:29,682 INFO L231 Difference]: Finished difference. Result has 88 places, 77 transitions, 540 flow [2024-06-04 14:54:29,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=540, PETRI_PLACES=88, PETRI_TRANSITIONS=77} [2024-06-04 14:54:29,683 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 58 predicate places. [2024-06-04 14:54:29,683 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 77 transitions, 540 flow [2024-06-04 14:54:29,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:29,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:29,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:29,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 14:54:29,684 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)] === [2024-06-04 14:54:29,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:29,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1488450109, now seen corresponding path program 2 times [2024-06-04 14:54:29,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:29,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880670346] [2024-06-04 14:54:29,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:29,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:29,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:30,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:30,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:30,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880670346] [2024-06-04 14:54:30,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880670346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:30,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:30,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:54:30,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706980340] [2024-06-04 14:54:30,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:30,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:54:30,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:30,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:54:30,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:54:30,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:54:30,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 77 transitions, 540 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:30,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:30,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:54:30,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:30,876 INFO L124 PetriNetUnfolderBase]: 253/455 cut-off events. [2024-06-04 14:54:30,877 INFO L125 PetriNetUnfolderBase]: For 7271/7271 co-relation queries the response was YES. [2024-06-04 14:54:30,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2182 conditions, 455 events. 253/455 cut-off events. For 7271/7271 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1752 event pairs, 46 based on Foata normal form. 3/458 useless extension candidates. Maximal degree in co-relation 2138. Up to 313 conditions per place. [2024-06-04 14:54:30,879 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 60 selfloop transitions, 34 changer transitions 0/96 dead transitions. [2024-06-04 14:54:30,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 96 transitions, 791 flow [2024-06-04 14:54:30,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:30,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:30,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 103 transitions. [2024-06-04 14:54:30,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4153225806451613 [2024-06-04 14:54:30,882 INFO L175 Difference]: Start difference. First operand has 88 places, 77 transitions, 540 flow. Second operand 8 states and 103 transitions. [2024-06-04 14:54:30,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 96 transitions, 791 flow [2024-06-04 14:54:30,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 96 transitions, 753 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-04 14:54:30,892 INFO L231 Difference]: Finished difference. Result has 90 places, 81 transitions, 612 flow [2024-06-04 14:54:30,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=612, PETRI_PLACES=90, PETRI_TRANSITIONS=81} [2024-06-04 14:54:30,892 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 60 predicate places. [2024-06-04 14:54:30,893 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 81 transitions, 612 flow [2024-06-04 14:54:30,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:30,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:30,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:30,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 14:54:30,893 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)] === [2024-06-04 14:54:30,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:30,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1488445335, now seen corresponding path program 3 times [2024-06-04 14:54:30,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:30,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931470596] [2024-06-04 14:54:30,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:30,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:30,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:31,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:31,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:31,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931470596] [2024-06-04 14:54:31,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931470596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:31,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:31,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:54:31,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145156459] [2024-06-04 14:54:31,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:31,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:54:31,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:31,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:54:31,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:54:31,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:54:31,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 81 transitions, 612 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:31,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:31,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:54:31,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:31,925 INFO L124 PetriNetUnfolderBase]: 250/450 cut-off events. [2024-06-04 14:54:31,926 INFO L125 PetriNetUnfolderBase]: For 7086/7086 co-relation queries the response was YES. [2024-06-04 14:54:31,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2219 conditions, 450 events. 250/450 cut-off events. For 7086/7086 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1721 event pairs, 50 based on Foata normal form. 2/452 useless extension candidates. Maximal degree in co-relation 2174. Up to 397 conditions per place. [2024-06-04 14:54:31,929 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 75 selfloop transitions, 16 changer transitions 0/93 dead transitions. [2024-06-04 14:54:31,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 93 transitions, 822 flow [2024-06-04 14:54:31,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:31,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:31,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 94 transitions. [2024-06-04 14:54:31,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3790322580645161 [2024-06-04 14:54:31,931 INFO L175 Difference]: Start difference. First operand has 90 places, 81 transitions, 612 flow. Second operand 8 states and 94 transitions. [2024-06-04 14:54:31,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 93 transitions, 822 flow [2024-06-04 14:54:31,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 93 transitions, 746 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-04 14:54:31,944 INFO L231 Difference]: Finished difference. Result has 92 places, 81 transitions, 572 flow [2024-06-04 14:54:31,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=572, PETRI_PLACES=92, PETRI_TRANSITIONS=81} [2024-06-04 14:54:31,945 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 62 predicate places. [2024-06-04 14:54:31,945 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 81 transitions, 572 flow [2024-06-04 14:54:31,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:31,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:31,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:31,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 14:54:31,946 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)] === [2024-06-04 14:54:31,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:31,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1599267979, now seen corresponding path program 3 times [2024-06-04 14:54:31,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:31,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134881666] [2024-06-04 14:54:31,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:31,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:31,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:32,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:32,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:32,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134881666] [2024-06-04 14:54:32,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134881666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:32,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:32,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:54:32,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873556298] [2024-06-04 14:54:32,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:32,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:54:32,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:32,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:54:32,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:54:32,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:54:32,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 81 transitions, 572 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:32,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:32,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:54:32,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:32,928 INFO L124 PetriNetUnfolderBase]: 253/455 cut-off events. [2024-06-04 14:54:32,928 INFO L125 PetriNetUnfolderBase]: For 7244/7244 co-relation queries the response was YES. [2024-06-04 14:54:32,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2203 conditions, 455 events. 253/455 cut-off events. For 7244/7244 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1758 event pairs, 39 based on Foata normal form. 1/456 useless extension candidates. Maximal degree in co-relation 2157. Up to 375 conditions per place. [2024-06-04 14:54:32,931 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 71 selfloop transitions, 25 changer transitions 0/98 dead transitions. [2024-06-04 14:54:32,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 98 transitions, 829 flow [2024-06-04 14:54:32,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:32,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:32,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 98 transitions. [2024-06-04 14:54:32,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951612903225806 [2024-06-04 14:54:32,933 INFO L175 Difference]: Start difference. First operand has 92 places, 81 transitions, 572 flow. Second operand 8 states and 98 transitions. [2024-06-04 14:54:32,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 98 transitions, 829 flow [2024-06-04 14:54:32,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 98 transitions, 788 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-04 14:54:32,946 INFO L231 Difference]: Finished difference. Result has 94 places, 85 transitions, 626 flow [2024-06-04 14:54:32,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=626, PETRI_PLACES=94, PETRI_TRANSITIONS=85} [2024-06-04 14:54:32,946 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 64 predicate places. [2024-06-04 14:54:32,946 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 85 transitions, 626 flow [2024-06-04 14:54:32,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:32,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:32,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:32,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 14:54:32,947 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)] === [2024-06-04 14:54:32,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:32,948 INFO L85 PathProgramCache]: Analyzing trace with hash -763754803, now seen corresponding path program 4 times [2024-06-04 14:54:32,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:32,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574415574] [2024-06-04 14:54:32,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:32,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:32,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:33,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:33,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:33,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574415574] [2024-06-04 14:54:33,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574415574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:33,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:33,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:54:33,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058854832] [2024-06-04 14:54:33,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:33,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:54:33,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:33,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:54:33,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:54:33,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:54:33,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 85 transitions, 626 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:33,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:33,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:54:33,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:33,937 INFO L124 PetriNetUnfolderBase]: 256/460 cut-off events. [2024-06-04 14:54:33,937 INFO L125 PetriNetUnfolderBase]: For 7834/7834 co-relation queries the response was YES. [2024-06-04 14:54:33,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2287 conditions, 460 events. 256/460 cut-off events. For 7834/7834 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1785 event pairs, 41 based on Foata normal form. 1/461 useless extension candidates. Maximal degree in co-relation 2239. Up to 364 conditions per place. [2024-06-04 14:54:33,942 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 76 selfloop transitions, 30 changer transitions 0/108 dead transitions. [2024-06-04 14:54:33,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 108 transitions, 973 flow [2024-06-04 14:54:33,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:33,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:33,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 106 transitions. [2024-06-04 14:54:33,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4274193548387097 [2024-06-04 14:54:33,944 INFO L175 Difference]: Start difference. First operand has 94 places, 85 transitions, 626 flow. Second operand 8 states and 106 transitions. [2024-06-04 14:54:33,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 108 transitions, 973 flow [2024-06-04 14:54:33,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 108 transitions, 930 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-04 14:54:33,955 INFO L231 Difference]: Finished difference. Result has 99 places, 90 transitions, 705 flow [2024-06-04 14:54:33,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=585, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=705, PETRI_PLACES=99, PETRI_TRANSITIONS=90} [2024-06-04 14:54:33,956 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 69 predicate places. [2024-06-04 14:54:33,956 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 90 transitions, 705 flow [2024-06-04 14:54:33,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:33,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:33,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:33,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 14:54:33,956 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)] === [2024-06-04 14:54:33,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:33,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1567006813, now seen corresponding path program 5 times [2024-06-04 14:54:33,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:33,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106323686] [2024-06-04 14:54:33,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:33,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:33,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:34,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:34,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:34,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106323686] [2024-06-04 14:54:34,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106323686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:34,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:34,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:54:34,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393057669] [2024-06-04 14:54:34,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:34,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:54:34,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:34,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:54:34,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:54:34,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:54:34,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 90 transitions, 705 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) [2024-06-04 14:54:34,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:34,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:54:34,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:35,096 INFO L124 PetriNetUnfolderBase]: 259/465 cut-off events. [2024-06-04 14:54:35,097 INFO L125 PetriNetUnfolderBase]: For 8452/8452 co-relation queries the response was YES. [2024-06-04 14:54:35,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2403 conditions, 465 events. 259/465 cut-off events. For 8452/8452 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1806 event pairs, 45 based on Foata normal form. 1/466 useless extension candidates. Maximal degree in co-relation 2353. Up to 391 conditions per place. [2024-06-04 14:54:35,100 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 79 selfloop transitions, 24 changer transitions 0/105 dead transitions. [2024-06-04 14:54:35,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 105 transitions, 970 flow [2024-06-04 14:54:35,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:54:35,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:54:35,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 106 transitions. [2024-06-04 14:54:35,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37992831541218636 [2024-06-04 14:54:35,105 INFO L175 Difference]: Start difference. First operand has 99 places, 90 transitions, 705 flow. Second operand 9 states and 106 transitions. [2024-06-04 14:54:35,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 105 transitions, 970 flow [2024-06-04 14:54:35,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 105 transitions, 915 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-04 14:54:35,119 INFO L231 Difference]: Finished difference. Result has 104 places, 93 transitions, 738 flow [2024-06-04 14:54:35,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=738, PETRI_PLACES=104, PETRI_TRANSITIONS=93} [2024-06-04 14:54:35,119 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 74 predicate places. [2024-06-04 14:54:35,119 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 93 transitions, 738 flow [2024-06-04 14:54:35,120 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) [2024-06-04 14:54:35,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:35,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:35,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 14:54:35,120 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)] === [2024-06-04 14:54:35,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:35,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1567179793, now seen corresponding path program 6 times [2024-06-04 14:54:35,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:35,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510999646] [2024-06-04 14:54:35,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:35,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:35,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:35,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:35,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:35,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510999646] [2024-06-04 14:54:35,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510999646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:35,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:35,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:54:35,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26736702] [2024-06-04 14:54:35,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:35,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:54:35,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:35,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:54:35,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:54:35,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:54:35,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 93 transitions, 738 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:35,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:35,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:54:35,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:36,104 INFO L124 PetriNetUnfolderBase]: 262/470 cut-off events. [2024-06-04 14:54:36,105 INFO L125 PetriNetUnfolderBase]: For 9131/9131 co-relation queries the response was YES. [2024-06-04 14:54:36,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2451 conditions, 470 events. 262/470 cut-off events. For 9131/9131 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1840 event pairs, 41 based on Foata normal form. 1/471 useless extension candidates. Maximal degree in co-relation 2400. Up to 396 conditions per place. [2024-06-04 14:54:36,108 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 80 selfloop transitions, 28 changer transitions 0/110 dead transitions. [2024-06-04 14:54:36,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 110 transitions, 1020 flow [2024-06-04 14:54:36,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:54:36,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:54:36,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 100 transitions. [2024-06-04 14:54:36,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-04 14:54:36,111 INFO L175 Difference]: Start difference. First operand has 104 places, 93 transitions, 738 flow. Second operand 8 states and 100 transitions. [2024-06-04 14:54:36,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 110 transitions, 1020 flow [2024-06-04 14:54:36,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 110 transitions, 958 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-04 14:54:36,125 INFO L231 Difference]: Finished difference. Result has 106 places, 96 transitions, 773 flow [2024-06-04 14:54:36,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=773, PETRI_PLACES=106, PETRI_TRANSITIONS=96} [2024-06-04 14:54:36,126 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 76 predicate places. [2024-06-04 14:54:36,126 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 96 transitions, 773 flow [2024-06-04 14:54:36,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:36,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:36,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:36,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 14:54:36,127 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)] === [2024-06-04 14:54:36,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:36,127 INFO L85 PathProgramCache]: Analyzing trace with hash 273519209, now seen corresponding path program 1 times [2024-06-04 14:54:36,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:36,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273443420] [2024-06-04 14:54:36,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:36,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:36,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:36,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:36,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:36,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273443420] [2024-06-04 14:54:36,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273443420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:36,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:36,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:54:36,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763297562] [2024-06-04 14:54:36,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:36,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:54:36,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:36,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:54:36,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:54:36,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:54:36,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 96 transitions, 773 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) [2024-06-04 14:54:36,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:36,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:54:36,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:37,267 INFO L124 PetriNetUnfolderBase]: 258/464 cut-off events. [2024-06-04 14:54:37,268 INFO L125 PetriNetUnfolderBase]: For 9311/9311 co-relation queries the response was YES. [2024-06-04 14:54:37,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2404 conditions, 464 events. 258/464 cut-off events. For 9311/9311 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1803 event pairs, 34 based on Foata normal form. 2/466 useless extension candidates. Maximal degree in co-relation 2352. Up to 427 conditions per place. [2024-06-04 14:54:37,272 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 94 selfloop transitions, 14 changer transitions 0/110 dead transitions. [2024-06-04 14:54:37,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 110 transitions, 1029 flow [2024-06-04 14:54:37,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:54:37,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:54:37,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 99 transitions. [2024-06-04 14:54:37,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-04 14:54:37,274 INFO L175 Difference]: Start difference. First operand has 106 places, 96 transitions, 773 flow. Second operand 9 states and 99 transitions. [2024-06-04 14:54:37,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 110 transitions, 1029 flow [2024-06-04 14:54:37,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 110 transitions, 962 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-04 14:54:37,295 INFO L231 Difference]: Finished difference. Result has 110 places, 98 transitions, 757 flow [2024-06-04 14:54:37,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=706, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=757, PETRI_PLACES=110, PETRI_TRANSITIONS=98} [2024-06-04 14:54:37,296 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 80 predicate places. [2024-06-04 14:54:37,296 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 98 transitions, 757 flow [2024-06-04 14:54:37,297 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) [2024-06-04 14:54:37,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:37,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:37,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-04 14:54:37,297 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)] === [2024-06-04 14:54:37,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:37,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1347712171, now seen corresponding path program 7 times [2024-06-04 14:54:37,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:37,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130063877] [2024-06-04 14:54:37,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:37,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:37,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:38,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:38,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:38,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130063877] [2024-06-04 14:54:38,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130063877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:38,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:38,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:54:38,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804801620] [2024-06-04 14:54:38,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:38,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:54:38,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:38,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:54:38,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:54:38,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:54:38,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 98 transitions, 757 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) [2024-06-04 14:54:38,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:38,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:54:38,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:38,422 INFO L124 PetriNetUnfolderBase]: 261/469 cut-off events. [2024-06-04 14:54:38,422 INFO L125 PetriNetUnfolderBase]: For 9428/9428 co-relation queries the response was YES. [2024-06-04 14:54:38,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2431 conditions, 469 events. 261/469 cut-off events. For 9428/9428 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 1839 event pairs, 38 based on Foata normal form. 1/470 useless extension candidates. Maximal degree in co-relation 2378. Up to 445 conditions per place. [2024-06-04 14:54:38,425 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 95 selfloop transitions, 14 changer transitions 0/111 dead transitions. [2024-06-04 14:54:38,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 111 transitions, 1036 flow [2024-06-04 14:54:38,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:54:38,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:54:38,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-06-04 14:54:38,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34408602150537637 [2024-06-04 14:54:38,428 INFO L175 Difference]: Start difference. First operand has 110 places, 98 transitions, 757 flow. Second operand 9 states and 96 transitions. [2024-06-04 14:54:38,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 111 transitions, 1036 flow [2024-06-04 14:54:38,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 111 transitions, 1001 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-04 14:54:38,443 INFO L231 Difference]: Finished difference. Result has 114 places, 102 transitions, 810 flow [2024-06-04 14:54:38,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=722, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=810, PETRI_PLACES=114, PETRI_TRANSITIONS=102} [2024-06-04 14:54:38,443 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 84 predicate places. [2024-06-04 14:54:38,444 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 102 transitions, 810 flow [2024-06-04 14:54:38,444 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) [2024-06-04 14:54:38,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:38,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:38,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-04 14:54:38,444 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)] === [2024-06-04 14:54:38,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:38,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1119811021, now seen corresponding path program 8 times [2024-06-04 14:54:38,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:38,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352416308] [2024-06-04 14:54:38,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:38,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:38,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:39,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:39,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:39,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352416308] [2024-06-04 14:54:39,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352416308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:39,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:39,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:54:39,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912238035] [2024-06-04 14:54:39,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:39,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:54:39,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:39,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:54:39,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:54:39,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:54:39,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 102 transitions, 810 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) [2024-06-04 14:54:39,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:39,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:54:39,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:39,592 INFO L124 PetriNetUnfolderBase]: 259/466 cut-off events. [2024-06-04 14:54:39,592 INFO L125 PetriNetUnfolderBase]: For 9558/9558 co-relation queries the response was YES. [2024-06-04 14:54:39,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2410 conditions, 466 events. 259/466 cut-off events. For 9558/9558 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 1830 event pairs, 40 based on Foata normal form. 1/467 useless extension candidates. Maximal degree in co-relation 2354. Up to 436 conditions per place. [2024-06-04 14:54:39,595 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 92 selfloop transitions, 17 changer transitions 0/111 dead transitions. [2024-06-04 14:54:39,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 111 transitions, 1048 flow [2024-06-04 14:54:39,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:54:39,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:54:39,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 98 transitions. [2024-06-04 14:54:39,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35125448028673834 [2024-06-04 14:54:39,599 INFO L175 Difference]: Start difference. First operand has 114 places, 102 transitions, 810 flow. Second operand 9 states and 98 transitions. [2024-06-04 14:54:39,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 111 transitions, 1048 flow [2024-06-04 14:54:39,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 111 transitions, 1001 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-04 14:54:39,623 INFO L231 Difference]: Finished difference. Result has 118 places, 102 transitions, 802 flow [2024-06-04 14:54:39,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=763, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=802, PETRI_PLACES=118, PETRI_TRANSITIONS=102} [2024-06-04 14:54:39,625 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 88 predicate places. [2024-06-04 14:54:39,625 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 102 transitions, 802 flow [2024-06-04 14:54:39,625 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) [2024-06-04 14:54:39,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:39,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:39,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-04 14:54:39,626 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)] === [2024-06-04 14:54:39,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:39,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1951212463, now seen corresponding path program 1 times [2024-06-04 14:54:39,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:39,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713898619] [2024-06-04 14:54:39,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:39,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:39,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:40,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:40,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:40,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713898619] [2024-06-04 14:54:40,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713898619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:40,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:40,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:54:40,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508274278] [2024-06-04 14:54:40,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:40,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:54:40,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:40,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:54:40,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:54:40,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:54:40,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 102 transitions, 802 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:40,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:40,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:54:40,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:40,593 INFO L124 PetriNetUnfolderBase]: 263/474 cut-off events. [2024-06-04 14:54:40,593 INFO L125 PetriNetUnfolderBase]: For 10622/10622 co-relation queries the response was YES. [2024-06-04 14:54:40,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2437 conditions, 474 events. 263/474 cut-off events. For 10622/10622 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 1884 event pairs, 22 based on Foata normal form. 2/476 useless extension candidates. Maximal degree in co-relation 2380. Up to 274 conditions per place. [2024-06-04 14:54:40,597 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 77 selfloop transitions, 43 changer transitions 0/122 dead transitions. [2024-06-04 14:54:40,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 122 transitions, 1154 flow [2024-06-04 14:54:40,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:54:40,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:54:40,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 109 transitions. [2024-06-04 14:54:40,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3906810035842294 [2024-06-04 14:54:40,599 INFO L175 Difference]: Start difference. First operand has 118 places, 102 transitions, 802 flow. Second operand 9 states and 109 transitions. [2024-06-04 14:54:40,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 122 transitions, 1154 flow [2024-06-04 14:54:40,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 122 transitions, 1031 flow, removed 10 selfloop flow, removed 12 redundant places. [2024-06-04 14:54:40,625 INFO L231 Difference]: Finished difference. Result has 115 places, 103 transitions, 773 flow [2024-06-04 14:54:40,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=679, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=773, PETRI_PLACES=115, PETRI_TRANSITIONS=103} [2024-06-04 14:54:40,626 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 85 predicate places. [2024-06-04 14:54:40,626 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 103 transitions, 773 flow [2024-06-04 14:54:40,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:40,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:40,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:40,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-04 14:54:40,626 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)] === [2024-06-04 14:54:40,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:40,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1425714433, now seen corresponding path program 2 times [2024-06-04 14:54:40,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:40,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334996056] [2024-06-04 14:54:40,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:40,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:40,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:41,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:41,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:41,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334996056] [2024-06-04 14:54:41,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334996056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:41,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:41,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:54:41,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071962620] [2024-06-04 14:54:41,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:41,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:54:41,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:41,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:54:41,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:54:41,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:54:41,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 103 transitions, 773 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:41,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:41,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:54:41,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:41,658 INFO L124 PetriNetUnfolderBase]: 267/482 cut-off events. [2024-06-04 14:54:41,658 INFO L125 PetriNetUnfolderBase]: For 11155/11155 co-relation queries the response was YES. [2024-06-04 14:54:41,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2454 conditions, 482 events. 267/482 cut-off events. For 11155/11155 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 1930 event pairs, 42 based on Foata normal form. 2/484 useless extension candidates. Maximal degree in co-relation 2399. Up to 363 conditions per place. [2024-06-04 14:54:41,661 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 76 selfloop transitions, 42 changer transitions 0/120 dead transitions. [2024-06-04 14:54:41,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 120 transitions, 1053 flow [2024-06-04 14:54:41,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:54:41,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:54:41,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 109 transitions. [2024-06-04 14:54:41,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3906810035842294 [2024-06-04 14:54:41,662 INFO L175 Difference]: Start difference. First operand has 115 places, 103 transitions, 773 flow. Second operand 9 states and 109 transitions. [2024-06-04 14:54:41,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 120 transitions, 1053 flow [2024-06-04 14:54:41,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 120 transitions, 975 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-04 14:54:41,683 INFO L231 Difference]: Finished difference. Result has 118 places, 104 transitions, 791 flow [2024-06-04 14:54:41,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=698, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=791, PETRI_PLACES=118, PETRI_TRANSITIONS=104} [2024-06-04 14:54:41,683 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 88 predicate places. [2024-06-04 14:54:41,684 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 104 transitions, 791 flow [2024-06-04 14:54:41,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:41,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:41,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:41,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-04 14:54:41,684 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)] === [2024-06-04 14:54:41,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:41,684 INFO L85 PathProgramCache]: Analyzing trace with hash -703827246, now seen corresponding path program 1 times [2024-06-04 14:54:41,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:41,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415094782] [2024-06-04 14:54:41,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:41,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:41,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:42,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:42,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:42,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415094782] [2024-06-04 14:54:42,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415094782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:42,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:42,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:54:42,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061876816] [2024-06-04 14:54:42,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:42,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:54:42,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:42,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:54:42,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:54:42,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:54:42,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 104 transitions, 791 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:42,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:42,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:54:42,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:42,800 INFO L124 PetriNetUnfolderBase]: 273/492 cut-off events. [2024-06-04 14:54:42,800 INFO L125 PetriNetUnfolderBase]: For 11852/11852 co-relation queries the response was YES. [2024-06-04 14:54:42,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2528 conditions, 492 events. 273/492 cut-off events. For 11852/11852 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 1969 event pairs, 37 based on Foata normal form. 2/494 useless extension candidates. Maximal degree in co-relation 2472. Up to 242 conditions per place. [2024-06-04 14:54:42,802 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 77 selfloop transitions, 49 changer transitions 0/128 dead transitions. [2024-06-04 14:54:42,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 128 transitions, 1197 flow [2024-06-04 14:54:42,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:54:42,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:54:42,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2024-06-04 14:54:42,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-04 14:54:42,804 INFO L175 Difference]: Start difference. First operand has 118 places, 104 transitions, 791 flow. Second operand 9 states and 117 transitions. [2024-06-04 14:54:42,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 128 transitions, 1197 flow [2024-06-04 14:54:42,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 128 transitions, 1115 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-04 14:54:42,821 INFO L231 Difference]: Finished difference. Result has 120 places, 108 transitions, 856 flow [2024-06-04 14:54:42,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=709, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=856, PETRI_PLACES=120, PETRI_TRANSITIONS=108} [2024-06-04 14:54:42,821 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 90 predicate places. [2024-06-04 14:54:42,822 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 108 transitions, 856 flow [2024-06-04 14:54:42,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:42,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:42,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:42,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-04 14:54:42,822 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)] === [2024-06-04 14:54:42,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:42,822 INFO L85 PathProgramCache]: Analyzing trace with hash -703831121, now seen corresponding path program 3 times [2024-06-04 14:54:42,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:42,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923967704] [2024-06-04 14:54:42,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:42,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:42,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:43,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:43,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:43,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923967704] [2024-06-04 14:54:43,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923967704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:43,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:43,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:54:43,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101055851] [2024-06-04 14:54:43,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:43,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:54:43,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:43,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:54:43,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:54:43,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:54:43,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 108 transitions, 856 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:43,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:43,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:54:43,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:43,924 INFO L124 PetriNetUnfolderBase]: 277/500 cut-off events. [2024-06-04 14:54:43,924 INFO L125 PetriNetUnfolderBase]: For 12635/12635 co-relation queries the response was YES. [2024-06-04 14:54:43,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2622 conditions, 500 events. 277/500 cut-off events. For 12635/12635 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2040 event pairs, 41 based on Foata normal form. 2/502 useless extension candidates. Maximal degree in co-relation 2565. Up to 367 conditions per place. [2024-06-04 14:54:43,927 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 81 selfloop transitions, 43 changer transitions 0/126 dead transitions. [2024-06-04 14:54:43,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 126 transitions, 1149 flow [2024-06-04 14:54:43,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:54:43,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:54:43,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2024-06-04 14:54:43,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978494623655914 [2024-06-04 14:54:43,929 INFO L175 Difference]: Start difference. First operand has 120 places, 108 transitions, 856 flow. Second operand 9 states and 111 transitions. [2024-06-04 14:54:43,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 126 transitions, 1149 flow [2024-06-04 14:54:43,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 126 transitions, 1089 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-04 14:54:43,956 INFO L231 Difference]: Finished difference. Result has 124 places, 109 transitions, 893 flow [2024-06-04 14:54:43,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=796, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=893, PETRI_PLACES=124, PETRI_TRANSITIONS=109} [2024-06-04 14:54:43,956 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 94 predicate places. [2024-06-04 14:54:43,957 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 109 transitions, 893 flow [2024-06-04 14:54:43,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:43,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:43,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:43,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-04 14:54:43,957 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)] === [2024-06-04 14:54:43,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:43,958 INFO L85 PathProgramCache]: Analyzing trace with hash -616991286, now seen corresponding path program 2 times [2024-06-04 14:54:43,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:43,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192464705] [2024-06-04 14:54:43,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:43,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:43,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:44,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:44,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:44,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192464705] [2024-06-04 14:54:44,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192464705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:44,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:44,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:54:44,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140800042] [2024-06-04 14:54:44,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:44,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:54:44,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:44,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:54:44,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:54:44,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:54:44,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 109 transitions, 893 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:44,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:44,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:54:44,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:45,064 INFO L124 PetriNetUnfolderBase]: 283/510 cut-off events. [2024-06-04 14:54:45,065 INFO L125 PetriNetUnfolderBase]: For 13464/13464 co-relation queries the response was YES. [2024-06-04 14:54:45,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2753 conditions, 510 events. 283/510 cut-off events. For 13464/13464 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2077 event pairs, 35 based on Foata normal form. 2/512 useless extension candidates. Maximal degree in co-relation 2694. Up to 340 conditions per place. [2024-06-04 14:54:45,067 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 85 selfloop transitions, 41 changer transitions 0/128 dead transitions. [2024-06-04 14:54:45,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 128 transitions, 1205 flow [2024-06-04 14:54:45,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:54:45,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:54:45,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 115 transitions. [2024-06-04 14:54:45,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121863799283154 [2024-06-04 14:54:45,068 INFO L175 Difference]: Start difference. First operand has 124 places, 109 transitions, 893 flow. Second operand 9 states and 115 transitions. [2024-06-04 14:54:45,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 128 transitions, 1205 flow [2024-06-04 14:54:45,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 128 transitions, 1119 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-04 14:54:45,090 INFO L231 Difference]: Finished difference. Result has 126 places, 111 transitions, 920 flow [2024-06-04 14:54:45,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=920, PETRI_PLACES=126, PETRI_TRANSITIONS=111} [2024-06-04 14:54:45,090 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 96 predicate places. [2024-06-04 14:54:45,090 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 111 transitions, 920 flow [2024-06-04 14:54:45,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:45,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:45,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:45,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-04 14:54:45,091 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)] === [2024-06-04 14:54:45,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:45,091 INFO L85 PathProgramCache]: Analyzing trace with hash -616991441, now seen corresponding path program 4 times [2024-06-04 14:54:45,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:45,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433716955] [2024-06-04 14:54:45,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:45,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:45,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:45,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:45,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:45,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433716955] [2024-06-04 14:54:45,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433716955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:45,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:45,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:54:45,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601511864] [2024-06-04 14:54:45,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:45,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:54:45,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:45,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:54:45,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:54:45,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:54:45,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 111 transitions, 920 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:45,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:45,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:54:45,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:46,044 INFO L124 PetriNetUnfolderBase]: 287/518 cut-off events. [2024-06-04 14:54:46,044 INFO L125 PetriNetUnfolderBase]: For 14276/14276 co-relation queries the response was YES. [2024-06-04 14:54:46,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2818 conditions, 518 events. 287/518 cut-off events. For 14276/14276 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2139 event pairs, 43 based on Foata normal form. 2/520 useless extension candidates. Maximal degree in co-relation 2758. Up to 438 conditions per place. [2024-06-04 14:54:46,046 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 95 selfloop transitions, 28 changer transitions 0/125 dead transitions. [2024-06-04 14:54:46,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 125 transitions, 1203 flow [2024-06-04 14:54:46,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:54:46,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:54:46,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 106 transitions. [2024-06-04 14:54:46,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37992831541218636 [2024-06-04 14:54:46,047 INFO L175 Difference]: Start difference. First operand has 126 places, 111 transitions, 920 flow. Second operand 9 states and 106 transitions. [2024-06-04 14:54:46,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 125 transitions, 1203 flow [2024-06-04 14:54:46,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 125 transitions, 1110 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-04 14:54:46,069 INFO L231 Difference]: Finished difference. Result has 128 places, 112 transitions, 896 flow [2024-06-04 14:54:46,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=827, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=896, PETRI_PLACES=128, PETRI_TRANSITIONS=112} [2024-06-04 14:54:46,069 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 98 predicate places. [2024-06-04 14:54:46,069 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 112 transitions, 896 flow [2024-06-04 14:54:46,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:46,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:46,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:46,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-04 14:54:46,070 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)] === [2024-06-04 14:54:46,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:46,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1102830167, now seen corresponding path program 5 times [2024-06-04 14:54:46,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:46,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454405852] [2024-06-04 14:54:46,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:46,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:46,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:46,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:46,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:46,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454405852] [2024-06-04 14:54:46,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454405852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:46,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:46,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:54:46,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819510469] [2024-06-04 14:54:46,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:46,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:54:46,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:46,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:54:46,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:54:46,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:54:46,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 112 transitions, 896 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:46,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:46,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:54:46,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:47,076 INFO L124 PetriNetUnfolderBase]: 291/526 cut-off events. [2024-06-04 14:54:47,076 INFO L125 PetriNetUnfolderBase]: For 14900/14900 co-relation queries the response was YES. [2024-06-04 14:54:47,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2813 conditions, 526 events. 291/526 cut-off events. For 14900/14900 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2191 event pairs, 45 based on Foata normal form. 2/528 useless extension candidates. Maximal degree in co-relation 2752. Up to 440 conditions per place. [2024-06-04 14:54:47,079 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 93 selfloop transitions, 31 changer transitions 0/126 dead transitions. [2024-06-04 14:54:47,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 126 transitions, 1183 flow [2024-06-04 14:54:47,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:54:47,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:54:47,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 107 transitions. [2024-06-04 14:54:47,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835125448028674 [2024-06-04 14:54:47,081 INFO L175 Difference]: Start difference. First operand has 128 places, 112 transitions, 896 flow. Second operand 9 states and 107 transitions. [2024-06-04 14:54:47,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 126 transitions, 1183 flow [2024-06-04 14:54:47,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 126 transitions, 1122 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-04 14:54:47,104 INFO L231 Difference]: Finished difference. Result has 130 places, 113 transitions, 912 flow [2024-06-04 14:54:47,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=835, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=912, PETRI_PLACES=130, PETRI_TRANSITIONS=113} [2024-06-04 14:54:47,104 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 100 predicate places. [2024-06-04 14:54:47,104 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 113 transitions, 912 flow [2024-06-04 14:54:47,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:47,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:47,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:47,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-04 14:54:47,105 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)] === [2024-06-04 14:54:47,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:47,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1102830012, now seen corresponding path program 3 times [2024-06-04 14:54:47,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:47,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186803552] [2024-06-04 14:54:47,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:47,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:47,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:48,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:48,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:48,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186803552] [2024-06-04 14:54:48,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186803552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:48,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:48,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:54:48,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757518118] [2024-06-04 14:54:48,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:48,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:54:48,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:48,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:54:48,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:54:48,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:54:48,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 113 transitions, 912 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:48,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:48,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:54:48,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:48,686 INFO L124 PetriNetUnfolderBase]: 297/536 cut-off events. [2024-06-04 14:54:48,687 INFO L125 PetriNetUnfolderBase]: For 15767/15767 co-relation queries the response was YES. [2024-06-04 14:54:48,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2890 conditions, 536 events. 297/536 cut-off events. For 15767/15767 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2240 event pairs, 41 based on Foata normal form. 2/538 useless extension candidates. Maximal degree in co-relation 2828. Up to 376 conditions per place. [2024-06-04 14:54:48,691 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 88 selfloop transitions, 41 changer transitions 0/131 dead transitions. [2024-06-04 14:54:48,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 131 transitions, 1232 flow [2024-06-04 14:54:48,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:54:48,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:54:48,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2024-06-04 14:54:48,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40860215053763443 [2024-06-04 14:54:48,692 INFO L175 Difference]: Start difference. First operand has 130 places, 113 transitions, 912 flow. Second operand 9 states and 114 transitions. [2024-06-04 14:54:48,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 131 transitions, 1232 flow [2024-06-04 14:54:48,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 131 transitions, 1166 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-04 14:54:48,731 INFO L231 Difference]: Finished difference. Result has 132 places, 115 transitions, 963 flow [2024-06-04 14:54:48,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=846, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=963, PETRI_PLACES=132, PETRI_TRANSITIONS=115} [2024-06-04 14:54:48,731 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 102 predicate places. [2024-06-04 14:54:48,731 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 115 transitions, 963 flow [2024-06-04 14:54:48,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:48,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:48,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:48,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-04 14:54:48,732 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)] === [2024-06-04 14:54:48,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:48,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1102833887, now seen corresponding path program 6 times [2024-06-04 14:54:48,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:48,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871112578] [2024-06-04 14:54:48,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:48,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:48,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:49,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:49,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:49,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871112578] [2024-06-04 14:54:49,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871112578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:49,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:49,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:54:49,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744314768] [2024-06-04 14:54:49,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:49,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:54:49,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:49,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:54:49,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:54:49,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:54:49,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 115 transitions, 963 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:49,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:49,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:54:49,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:49,950 INFO L124 PetriNetUnfolderBase]: 301/544 cut-off events. [2024-06-04 14:54:49,950 INFO L125 PetriNetUnfolderBase]: For 16636/16636 co-relation queries the response was YES. [2024-06-04 14:54:49,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2982 conditions, 544 events. 301/544 cut-off events. For 16636/16636 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2295 event pairs, 45 based on Foata normal form. 2/546 useless extension candidates. Maximal degree in co-relation 2919. Up to 438 conditions per place. [2024-06-04 14:54:49,953 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 95 selfloop transitions, 33 changer transitions 0/130 dead transitions. [2024-06-04 14:54:49,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 130 transitions, 1262 flow [2024-06-04 14:54:49,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:54:49,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:54:49,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 108 transitions. [2024-06-04 14:54:49,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-04 14:54:49,954 INFO L175 Difference]: Start difference. First operand has 132 places, 115 transitions, 963 flow. Second operand 9 states and 108 transitions. [2024-06-04 14:54:49,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 130 transitions, 1262 flow [2024-06-04 14:54:49,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 130 transitions, 1165 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-04 14:54:49,986 INFO L231 Difference]: Finished difference. Result has 134 places, 116 transitions, 949 flow [2024-06-04 14:54:49,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=866, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=949, PETRI_PLACES=134, PETRI_TRANSITIONS=116} [2024-06-04 14:54:49,987 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 104 predicate places. [2024-06-04 14:54:49,987 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 116 transitions, 949 flow [2024-06-04 14:54:49,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:49,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:49,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:49,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-04 14:54:49,988 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)] === [2024-06-04 14:54:49,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:49,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1823774913, now seen corresponding path program 7 times [2024-06-04 14:54:49,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:49,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954142360] [2024-06-04 14:54:49,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:49,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:49,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:50,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:50,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:50,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954142360] [2024-06-04 14:54:50,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954142360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:50,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:50,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:54:50,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616009932] [2024-06-04 14:54:50,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:50,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:54:50,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:50,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:54:50,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:54:50,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:54:50,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 116 transitions, 949 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:50,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:50,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:54:50,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:51,214 INFO L124 PetriNetUnfolderBase]: 305/552 cut-off events. [2024-06-04 14:54:51,214 INFO L125 PetriNetUnfolderBase]: For 17447/17447 co-relation queries the response was YES. [2024-06-04 14:54:51,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2997 conditions, 552 events. 305/552 cut-off events. For 17447/17447 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2350 event pairs, 27 based on Foata normal form. 2/554 useless extension candidates. Maximal degree in co-relation 2933. Up to 405 conditions per place. [2024-06-04 14:54:51,219 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 93 selfloop transitions, 43 changer transitions 0/138 dead transitions. [2024-06-04 14:54:51,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 138 transitions, 1366 flow [2024-06-04 14:54:51,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:54:51,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:54:51,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 116 transitions. [2024-06-04 14:54:51,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4157706093189964 [2024-06-04 14:54:51,220 INFO L175 Difference]: Start difference. First operand has 134 places, 116 transitions, 949 flow. Second operand 9 states and 116 transitions. [2024-06-04 14:54:51,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 138 transitions, 1366 flow [2024-06-04 14:54:51,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 138 transitions, 1294 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-04 14:54:51,269 INFO L231 Difference]: Finished difference. Result has 136 places, 117 transitions, 980 flow [2024-06-04 14:54:51,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=877, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=980, PETRI_PLACES=136, PETRI_TRANSITIONS=117} [2024-06-04 14:54:51,270 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 106 predicate places. [2024-06-04 14:54:51,270 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 117 transitions, 980 flow [2024-06-04 14:54:51,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:51,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:51,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:51,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-04 14:54:51,271 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)] === [2024-06-04 14:54:51,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:51,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1283611363, now seen corresponding path program 8 times [2024-06-04 14:54:51,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:51,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702410749] [2024-06-04 14:54:51,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:51,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:51,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:52,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:52,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:52,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702410749] [2024-06-04 14:54:52,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702410749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:52,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:52,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:54:52,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848174106] [2024-06-04 14:54:52,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:52,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:54:52,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:52,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:54:52,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:54:52,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:54:52,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 117 transitions, 980 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:52,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:52,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:54:52,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:52,438 INFO L124 PetriNetUnfolderBase]: 309/560 cut-off events. [2024-06-04 14:54:52,438 INFO L125 PetriNetUnfolderBase]: For 18379/18379 co-relation queries the response was YES. [2024-06-04 14:54:52,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3078 conditions, 560 events. 309/560 cut-off events. For 18379/18379 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2408 event pairs, 41 based on Foata normal form. 2/562 useless extension candidates. Maximal degree in co-relation 3013. Up to 456 conditions per place. [2024-06-04 14:54:52,441 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 94 selfloop transitions, 41 changer transitions 0/137 dead transitions. [2024-06-04 14:54:52,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 137 transitions, 1311 flow [2024-06-04 14:54:52,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:54:52,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:54:52,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2024-06-04 14:54:52,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40860215053763443 [2024-06-04 14:54:52,449 INFO L175 Difference]: Start difference. First operand has 136 places, 117 transitions, 980 flow. Second operand 9 states and 114 transitions. [2024-06-04 14:54:52,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 137 transitions, 1311 flow [2024-06-04 14:54:52,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 137 transitions, 1205 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-04 14:54:52,498 INFO L231 Difference]: Finished difference. Result has 138 places, 118 transitions, 977 flow [2024-06-04 14:54:52,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=876, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=977, PETRI_PLACES=138, PETRI_TRANSITIONS=118} [2024-06-04 14:54:52,499 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 108 predicate places. [2024-06-04 14:54:52,515 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 118 transitions, 977 flow [2024-06-04 14:54:52,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:52,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:52,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:52,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-04 14:54:52,516 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)] === [2024-06-04 14:54:52,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:52,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1283611208, now seen corresponding path program 4 times [2024-06-04 14:54:52,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:52,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835611457] [2024-06-04 14:54:52,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:52,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:52,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:53,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:53,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:53,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835611457] [2024-06-04 14:54:53,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835611457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:53,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:53,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:54:53,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710287825] [2024-06-04 14:54:53,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:53,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:54:53,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:53,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:54:53,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:54:53,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:54:53,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 118 transitions, 977 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:53,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:53,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:54:53,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:53,983 INFO L124 PetriNetUnfolderBase]: 325/586 cut-off events. [2024-06-04 14:54:53,984 INFO L125 PetriNetUnfolderBase]: For 21087/21087 co-relation queries the response was YES. [2024-06-04 14:54:53,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3298 conditions, 586 events. 325/586 cut-off events. For 21087/21087 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2523 event pairs, 41 based on Foata normal form. 2/588 useless extension candidates. Maximal degree in co-relation 3232. Up to 391 conditions per place. [2024-06-04 14:54:53,987 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 95 selfloop transitions, 48 changer transitions 0/145 dead transitions. [2024-06-04 14:54:53,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 145 transitions, 1463 flow [2024-06-04 14:54:53,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:54:53,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:54:53,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 122 transitions. [2024-06-04 14:54:53,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43727598566308246 [2024-06-04 14:54:53,993 INFO L175 Difference]: Start difference. First operand has 138 places, 118 transitions, 977 flow. Second operand 9 states and 122 transitions. [2024-06-04 14:54:53,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 145 transitions, 1463 flow [2024-06-04 14:54:54,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 145 transitions, 1373 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-04 14:54:54,049 INFO L231 Difference]: Finished difference. Result has 140 places, 122 transitions, 1052 flow [2024-06-04 14:54:54,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=887, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1052, PETRI_PLACES=140, PETRI_TRANSITIONS=122} [2024-06-04 14:54:54,049 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 110 predicate places. [2024-06-04 14:54:54,049 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 122 transitions, 1052 flow [2024-06-04 14:54:54,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:54,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:54,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:54,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-04 14:54:54,051 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)] === [2024-06-04 14:54:54,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:54,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1278099098, now seen corresponding path program 5 times [2024-06-04 14:54:54,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:54,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715066928] [2024-06-04 14:54:54,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:54,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:54,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:55,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:55,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:55,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715066928] [2024-06-04 14:54:55,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715066928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:55,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:55,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:54:55,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685166737] [2024-06-04 14:54:55,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:55,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:54:55,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:55,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:54:55,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:54:55,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:54:55,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 122 transitions, 1052 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) [2024-06-04 14:54:55,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:55,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:54:55,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:55,504 INFO L124 PetriNetUnfolderBase]: 337/606 cut-off events. [2024-06-04 14:54:55,504 INFO L125 PetriNetUnfolderBase]: For 22272/22272 co-relation queries the response was YES. [2024-06-04 14:54:55,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3463 conditions, 606 events. 337/606 cut-off events. For 22272/22272 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 2637 event pairs, 46 based on Foata normal form. 2/608 useless extension candidates. Maximal degree in co-relation 3396. Up to 463 conditions per place. [2024-06-04 14:54:55,507 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 106 selfloop transitions, 36 changer transitions 0/144 dead transitions. [2024-06-04 14:54:55,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 144 transitions, 1428 flow [2024-06-04 14:54:55,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:54:55,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:54:55,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-06-04 14:54:55,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3967741935483871 [2024-06-04 14:54:55,514 INFO L175 Difference]: Start difference. First operand has 140 places, 122 transitions, 1052 flow. Second operand 10 states and 123 transitions. [2024-06-04 14:54:55,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 144 transitions, 1428 flow [2024-06-04 14:54:55,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 144 transitions, 1352 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-04 14:54:55,570 INFO L231 Difference]: Finished difference. Result has 145 places, 126 transitions, 1109 flow [2024-06-04 14:54:55,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=978, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1109, PETRI_PLACES=145, PETRI_TRANSITIONS=126} [2024-06-04 14:54:55,572 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 115 predicate places. [2024-06-04 14:54:55,573 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 126 transitions, 1109 flow [2024-06-04 14:54:55,574 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) [2024-06-04 14:54:55,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:55,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:55,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-04 14:54:55,575 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)] === [2024-06-04 14:54:55,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:55,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1278104678, now seen corresponding path program 6 times [2024-06-04 14:54:55,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:55,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276515092] [2024-06-04 14:54:55,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:55,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:55,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:56,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:56,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:56,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276515092] [2024-06-04 14:54:56,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276515092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:56,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:56,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:54:56,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719126818] [2024-06-04 14:54:56,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:56,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:54:56,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:56,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:54:56,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:54:56,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:54:56,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 126 transitions, 1109 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) [2024-06-04 14:54:56,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:56,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:54:56,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:57,051 INFO L124 PetriNetUnfolderBase]: 353/632 cut-off events. [2024-06-04 14:54:57,051 INFO L125 PetriNetUnfolderBase]: For 25347/25347 co-relation queries the response was YES. [2024-06-04 14:54:57,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3791 conditions, 632 events. 353/632 cut-off events. For 25347/25347 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 2773 event pairs, 40 based on Foata normal form. 2/634 useless extension candidates. Maximal degree in co-relation 3722. Up to 447 conditions per place. [2024-06-04 14:54:57,055 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 103 selfloop transitions, 45 changer transitions 0/150 dead transitions. [2024-06-04 14:54:57,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 150 transitions, 1615 flow [2024-06-04 14:54:57,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:54:57,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:54:57,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2024-06-04 14:54:57,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096774193548387 [2024-06-04 14:54:57,057 INFO L175 Difference]: Start difference. First operand has 145 places, 126 transitions, 1109 flow. Second operand 10 states and 127 transitions. [2024-06-04 14:54:57,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 150 transitions, 1615 flow [2024-06-04 14:54:57,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 150 transitions, 1524 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-04 14:54:57,115 INFO L231 Difference]: Finished difference. Result has 148 places, 130 transitions, 1193 flow [2024-06-04 14:54:57,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1018, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1193, PETRI_PLACES=148, PETRI_TRANSITIONS=130} [2024-06-04 14:54:57,116 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 118 predicate places. [2024-06-04 14:54:57,116 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 130 transitions, 1193 flow [2024-06-04 14:54:57,116 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) [2024-06-04 14:54:57,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:57,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:57,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-04 14:54:57,117 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)] === [2024-06-04 14:54:57,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:57,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1337926732, now seen corresponding path program 7 times [2024-06-04 14:54:57,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:57,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653960754] [2024-06-04 14:54:57,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:57,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:57,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:58,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:58,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:58,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653960754] [2024-06-04 14:54:58,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653960754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:58,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:58,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:54:58,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243926814] [2024-06-04 14:54:58,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:58,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:54:58,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:58,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:54:58,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:54:58,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:54:58,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 130 transitions, 1193 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:58,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:58,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:54:58,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:58,522 INFO L124 PetriNetUnfolderBase]: 359/642 cut-off events. [2024-06-04 14:54:58,522 INFO L125 PetriNetUnfolderBase]: For 26862/26862 co-relation queries the response was YES. [2024-06-04 14:54:58,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3904 conditions, 642 events. 359/642 cut-off events. For 26862/26862 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 2850 event pairs, 43 based on Foata normal form. 2/644 useless extension candidates. Maximal degree in co-relation 3834. Up to 499 conditions per place. [2024-06-04 14:54:58,527 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 108 selfloop transitions, 41 changer transitions 0/151 dead transitions. [2024-06-04 14:54:58,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 151 transitions, 1577 flow [2024-06-04 14:54:58,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:54:58,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:54:58,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 115 transitions. [2024-06-04 14:54:58,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121863799283154 [2024-06-04 14:54:58,529 INFO L175 Difference]: Start difference. First operand has 148 places, 130 transitions, 1193 flow. Second operand 9 states and 115 transitions. [2024-06-04 14:54:58,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 151 transitions, 1577 flow [2024-06-04 14:54:58,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 151 transitions, 1503 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-04 14:54:58,590 INFO L231 Difference]: Finished difference. Result has 151 places, 132 transitions, 1252 flow [2024-06-04 14:54:58,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1119, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1252, PETRI_PLACES=151, PETRI_TRANSITIONS=132} [2024-06-04 14:54:58,591 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 121 predicate places. [2024-06-04 14:54:58,591 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 132 transitions, 1252 flow [2024-06-04 14:54:58,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:54:58,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:58,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:58,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-04 14:54:58,592 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)] === [2024-06-04 14:54:58,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:58,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1818264663, now seen corresponding path program 9 times [2024-06-04 14:54:58,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:58,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791794713] [2024-06-04 14:54:58,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:58,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:58,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:54:59,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:54:59,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:54:59,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791794713] [2024-06-04 14:54:59,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791794713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:54:59,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:54:59,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:54:59,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427642721] [2024-06-04 14:54:59,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:54:59,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:54:59,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:54:59,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:54:59,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:54:59,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:54:59,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 132 transitions, 1252 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) [2024-06-04 14:54:59,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:54:59,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:54:59,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:54:59,838 INFO L124 PetriNetUnfolderBase]: 363/650 cut-off events. [2024-06-04 14:54:59,838 INFO L125 PetriNetUnfolderBase]: For 27771/27771 co-relation queries the response was YES. [2024-06-04 14:54:59,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4027 conditions, 650 events. 363/650 cut-off events. For 27771/27771 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 2866 event pairs, 57 based on Foata normal form. 2/652 useless extension candidates. Maximal degree in co-relation 3955. Up to 570 conditions per place. [2024-06-04 14:54:59,842 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 117 selfloop transitions, 28 changer transitions 0/147 dead transitions. [2024-06-04 14:54:59,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 147 transitions, 1589 flow [2024-06-04 14:54:59,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:54:59,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:54:59,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-04 14:54:59,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-04 14:54:59,845 INFO L175 Difference]: Start difference. First operand has 151 places, 132 transitions, 1252 flow. Second operand 10 states and 115 transitions. [2024-06-04 14:54:59,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 147 transitions, 1589 flow [2024-06-04 14:54:59,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 147 transitions, 1477 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-04 14:54:59,915 INFO L231 Difference]: Finished difference. Result has 154 places, 133 transitions, 1217 flow [2024-06-04 14:54:59,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1140, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1217, PETRI_PLACES=154, PETRI_TRANSITIONS=133} [2024-06-04 14:54:59,916 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 124 predicate places. [2024-06-04 14:54:59,916 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 133 transitions, 1217 flow [2024-06-04 14:54:59,917 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) [2024-06-04 14:54:59,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:54:59,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:54:59,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-04 14:54:59,917 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)] === [2024-06-04 14:54:59,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:54:59,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1818049182, now seen corresponding path program 1 times [2024-06-04 14:54:59,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:54:59,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345203504] [2024-06-04 14:54:59,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:54:59,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:54:59,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:01,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:01,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:01,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345203504] [2024-06-04 14:55:01,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345203504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:01,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:01,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:55:01,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771536622] [2024-06-04 14:55:01,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:01,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:55:01,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:01,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:55:01,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:55:01,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:55:01,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 133 transitions, 1217 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) [2024-06-04 14:55:01,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:01,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:55:01,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:01,373 INFO L124 PetriNetUnfolderBase]: 387/702 cut-off events. [2024-06-04 14:55:01,373 INFO L125 PetriNetUnfolderBase]: For 42640/42640 co-relation queries the response was YES. [2024-06-04 14:55:01,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4143 conditions, 702 events. 387/702 cut-off events. For 42640/42640 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 3217 event pairs, 51 based on Foata normal form. 14/716 useless extension candidates. Maximal degree in co-relation 4070. Up to 501 conditions per place. [2024-06-04 14:55:01,377 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 110 selfloop transitions, 34 changer transitions 10/156 dead transitions. [2024-06-04 14:55:01,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 156 transitions, 1609 flow [2024-06-04 14:55:01,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:55:01,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:55:01,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-06-04 14:55:01,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-04 14:55:01,379 INFO L175 Difference]: Start difference. First operand has 154 places, 133 transitions, 1217 flow. Second operand 10 states and 125 transitions. [2024-06-04 14:55:01,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 156 transitions, 1609 flow [2024-06-04 14:55:01,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 156 transitions, 1543 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-04 14:55:01,422 INFO L231 Difference]: Finished difference. Result has 156 places, 131 transitions, 1213 flow [2024-06-04 14:55:01,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1151, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1213, PETRI_PLACES=156, PETRI_TRANSITIONS=131} [2024-06-04 14:55:01,423 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 126 predicate places. [2024-06-04 14:55:01,423 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 131 transitions, 1213 flow [2024-06-04 14:55:01,423 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) [2024-06-04 14:55:01,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:01,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:01,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-04 14:55:01,423 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)] === [2024-06-04 14:55:01,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:01,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1337932467, now seen corresponding path program 10 times [2024-06-04 14:55:01,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:01,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738846289] [2024-06-04 14:55:01,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:01,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:01,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:02,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:02,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:02,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738846289] [2024-06-04 14:55:02,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738846289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:02,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:02,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:55:02,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854043543] [2024-06-04 14:55:02,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:02,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:55:02,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:02,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:55:02,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:55:02,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:55:02,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 131 transitions, 1213 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:02,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:02,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:55:02,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:02,546 INFO L124 PetriNetUnfolderBase]: 373/680 cut-off events. [2024-06-04 14:55:02,546 INFO L125 PetriNetUnfolderBase]: For 30090/30090 co-relation queries the response was YES. [2024-06-04 14:55:02,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4096 conditions, 680 events. 373/680 cut-off events. For 30090/30090 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3085 event pairs, 61 based on Foata normal form. 2/682 useless extension candidates. Maximal degree in co-relation 4022. Up to 600 conditions per place. [2024-06-04 14:55:02,550 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 115 selfloop transitions, 31 changer transitions 0/148 dead transitions. [2024-06-04 14:55:02,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 148 transitions, 1560 flow [2024-06-04 14:55:02,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:55:02,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:55:02,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 109 transitions. [2024-06-04 14:55:02,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3906810035842294 [2024-06-04 14:55:02,551 INFO L175 Difference]: Start difference. First operand has 156 places, 131 transitions, 1213 flow. Second operand 9 states and 109 transitions. [2024-06-04 14:55:02,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 148 transitions, 1560 flow [2024-06-04 14:55:02,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 148 transitions, 1468 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-04 14:55:02,614 INFO L231 Difference]: Finished difference. Result has 155 places, 132 transitions, 1206 flow [2024-06-04 14:55:02,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1121, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1206, PETRI_PLACES=155, PETRI_TRANSITIONS=132} [2024-06-04 14:55:02,614 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 125 predicate places. [2024-06-04 14:55:02,614 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 132 transitions, 1206 flow [2024-06-04 14:55:02,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:02,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:02,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:02,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-04 14:55:02,615 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)] === [2024-06-04 14:55:02,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:02,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1818057118, now seen corresponding path program 8 times [2024-06-04 14:55:02,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:02,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101149640] [2024-06-04 14:55:02,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:02,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:02,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:03,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:03,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:03,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101149640] [2024-06-04 14:55:03,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101149640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:03,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:03,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:55:03,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487407819] [2024-06-04 14:55:03,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:03,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:55:03,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:03,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:55:03,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:55:03,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:55:03,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 132 transitions, 1206 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) [2024-06-04 14:55:03,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:03,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:55:03,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:04,198 INFO L124 PetriNetUnfolderBase]: 369/674 cut-off events. [2024-06-04 14:55:04,198 INFO L125 PetriNetUnfolderBase]: For 28699/28699 co-relation queries the response was YES. [2024-06-04 14:55:04,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3931 conditions, 674 events. 369/674 cut-off events. For 28699/28699 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3052 event pairs, 50 based on Foata normal form. 2/676 useless extension candidates. Maximal degree in co-relation 3857. Up to 531 conditions per place. [2024-06-04 14:55:04,202 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 114 selfloop transitions, 36 changer transitions 0/152 dead transitions. [2024-06-04 14:55:04,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 152 transitions, 1550 flow [2024-06-04 14:55:04,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 14:55:04,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 14:55:04,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 139 transitions. [2024-06-04 14:55:04,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3736559139784946 [2024-06-04 14:55:04,203 INFO L175 Difference]: Start difference. First operand has 155 places, 132 transitions, 1206 flow. Second operand 12 states and 139 transitions. [2024-06-04 14:55:04,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 152 transitions, 1550 flow [2024-06-04 14:55:04,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 152 transitions, 1456 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-04 14:55:04,253 INFO L231 Difference]: Finished difference. Result has 160 places, 132 transitions, 1189 flow [2024-06-04 14:55:04,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1112, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1189, PETRI_PLACES=160, PETRI_TRANSITIONS=132} [2024-06-04 14:55:04,253 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 130 predicate places. [2024-06-04 14:55:04,254 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 132 transitions, 1189 flow [2024-06-04 14:55:04,254 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) [2024-06-04 14:55:04,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:04,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:04,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-04 14:55:04,254 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)] === [2024-06-04 14:55:04,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:04,254 INFO L85 PathProgramCache]: Analyzing trace with hash 2093550048, now seen corresponding path program 9 times [2024-06-04 14:55:04,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:04,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036413965] [2024-06-04 14:55:04,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:04,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:04,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:05,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:05,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:05,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036413965] [2024-06-04 14:55:05,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036413965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:05,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:05,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:55:05,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296868715] [2024-06-04 14:55:05,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:05,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:55:05,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:05,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:55:05,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:55:05,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:55:05,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 132 transitions, 1189 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:05,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:05,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:55:05,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:05,403 INFO L124 PetriNetUnfolderBase]: 375/684 cut-off events. [2024-06-04 14:55:05,403 INFO L125 PetriNetUnfolderBase]: For 29699/29699 co-relation queries the response was YES. [2024-06-04 14:55:05,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4009 conditions, 684 events. 375/684 cut-off events. For 29699/29699 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3115 event pairs, 42 based on Foata normal form. 2/686 useless extension candidates. Maximal degree in co-relation 3934. Up to 510 conditions per place. [2024-06-04 14:55:05,407 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 105 selfloop transitions, 48 changer transitions 0/155 dead transitions. [2024-06-04 14:55:05,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 155 transitions, 1589 flow [2024-06-04 14:55:05,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:55:05,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:55:05,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 120 transitions. [2024-06-04 14:55:05,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43010752688172044 [2024-06-04 14:55:05,408 INFO L175 Difference]: Start difference. First operand has 160 places, 132 transitions, 1189 flow. Second operand 9 states and 120 transitions. [2024-06-04 14:55:05,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 155 transitions, 1589 flow [2024-06-04 14:55:05,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 155 transitions, 1500 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-04 14:55:05,458 INFO L231 Difference]: Finished difference. Result has 158 places, 134 transitions, 1251 flow [2024-06-04 14:55:05,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1100, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1251, PETRI_PLACES=158, PETRI_TRANSITIONS=134} [2024-06-04 14:55:05,459 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 128 predicate places. [2024-06-04 14:55:05,459 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 134 transitions, 1251 flow [2024-06-04 14:55:05,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:05,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:05,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:05,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-04 14:55:05,459 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)] === [2024-06-04 14:55:05,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:05,459 INFO L85 PathProgramCache]: Analyzing trace with hash -412268010, now seen corresponding path program 2 times [2024-06-04 14:55:05,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:05,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481935846] [2024-06-04 14:55:05,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:05,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:05,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:06,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:06,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:06,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481935846] [2024-06-04 14:55:06,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481935846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:06,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:06,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:55:06,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788103715] [2024-06-04 14:55:06,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:06,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:55:06,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:06,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:55:06,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:55:06,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:55:06,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 134 transitions, 1251 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) [2024-06-04 14:55:06,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:06,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:55:06,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:06,852 INFO L124 PetriNetUnfolderBase]: 379/692 cut-off events. [2024-06-04 14:55:06,852 INFO L125 PetriNetUnfolderBase]: For 31074/31074 co-relation queries the response was YES. [2024-06-04 14:55:06,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4102 conditions, 692 events. 379/692 cut-off events. For 31074/31074 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 3180 event pairs, 56 based on Foata normal form. 2/694 useless extension candidates. Maximal degree in co-relation 4026. Up to 650 conditions per place. [2024-06-04 14:55:06,856 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 128 selfloop transitions, 17 changer transitions 0/147 dead transitions. [2024-06-04 14:55:06,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 147 transitions, 1583 flow [2024-06-04 14:55:06,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:55:06,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:55:06,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2024-06-04 14:55:06,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36200716845878134 [2024-06-04 14:55:06,857 INFO L175 Difference]: Start difference. First operand has 158 places, 134 transitions, 1251 flow. Second operand 9 states and 101 transitions. [2024-06-04 14:55:06,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 147 transitions, 1583 flow [2024-06-04 14:55:06,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 147 transitions, 1456 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-04 14:55:06,916 INFO L231 Difference]: Finished difference. Result has 160 places, 135 transitions, 1180 flow [2024-06-04 14:55:06,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1124, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1180, PETRI_PLACES=160, PETRI_TRANSITIONS=135} [2024-06-04 14:55:06,917 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 130 predicate places. [2024-06-04 14:55:06,917 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 135 transitions, 1180 flow [2024-06-04 14:55:06,917 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) [2024-06-04 14:55:06,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:06,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:06,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-04 14:55:06,918 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)] === [2024-06-04 14:55:06,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:06,918 INFO L85 PathProgramCache]: Analyzing trace with hash -637775292, now seen corresponding path program 3 times [2024-06-04 14:55:06,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:06,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978247926] [2024-06-04 14:55:06,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:06,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:06,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:07,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:07,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:07,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978247926] [2024-06-04 14:55:07,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978247926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:07,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:07,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:55:07,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791395787] [2024-06-04 14:55:07,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:07,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:55:07,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:07,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:55:07,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:55:08,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:55:08,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 135 transitions, 1180 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) [2024-06-04 14:55:08,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:08,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:55:08,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:08,261 INFO L124 PetriNetUnfolderBase]: 386/705 cut-off events. [2024-06-04 14:55:08,261 INFO L125 PetriNetUnfolderBase]: For 31963/31963 co-relation queries the response was YES. [2024-06-04 14:55:08,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4061 conditions, 705 events. 386/705 cut-off events. For 31963/31963 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 3251 event pairs, 53 based on Foata normal form. 2/707 useless extension candidates. Maximal degree in co-relation 3984. Up to 666 conditions per place. [2024-06-04 14:55:08,265 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 134 selfloop transitions, 16 changer transitions 0/152 dead transitions. [2024-06-04 14:55:08,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 152 transitions, 1544 flow [2024-06-04 14:55:08,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:55:08,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:55:08,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 100 transitions. [2024-06-04 14:55:08,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35842293906810035 [2024-06-04 14:55:08,266 INFO L175 Difference]: Start difference. First operand has 160 places, 135 transitions, 1180 flow. Second operand 9 states and 100 transitions. [2024-06-04 14:55:08,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 152 transitions, 1544 flow [2024-06-04 14:55:08,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 152 transitions, 1495 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-04 14:55:08,329 INFO L231 Difference]: Finished difference. Result has 164 places, 140 transitions, 1225 flow [2024-06-04 14:55:08,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1131, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1225, PETRI_PLACES=164, PETRI_TRANSITIONS=140} [2024-06-04 14:55:08,329 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 134 predicate places. [2024-06-04 14:55:08,329 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 140 transitions, 1225 flow [2024-06-04 14:55:08,330 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) [2024-06-04 14:55:08,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:08,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:08,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-04 14:55:08,330 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)] === [2024-06-04 14:55:08,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:08,330 INFO L85 PathProgramCache]: Analyzing trace with hash -371751582, now seen corresponding path program 4 times [2024-06-04 14:55:08,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:08,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87856901] [2024-06-04 14:55:08,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:08,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:08,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:09,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:09,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:09,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87856901] [2024-06-04 14:55:09,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87856901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:09,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:09,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:55:09,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647858899] [2024-06-04 14:55:09,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:09,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:55:09,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:09,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:55:09,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:55:09,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:55:09,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 140 transitions, 1225 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) [2024-06-04 14:55:09,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:09,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:55:09,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:09,667 INFO L124 PetriNetUnfolderBase]: 390/713 cut-off events. [2024-06-04 14:55:09,668 INFO L125 PetriNetUnfolderBase]: For 33184/33184 co-relation queries the response was YES. [2024-06-04 14:55:09,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4188 conditions, 713 events. 390/713 cut-off events. For 33184/33184 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3287 event pairs, 56 based on Foata normal form. 2/715 useless extension candidates. Maximal degree in co-relation 4108. Up to 678 conditions per place. [2024-06-04 14:55:09,672 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 137 selfloop transitions, 13 changer transitions 0/152 dead transitions. [2024-06-04 14:55:09,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 152 transitions, 1569 flow [2024-06-04 14:55:09,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:55:09,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:55:09,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-06-04 14:55:09,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34408602150537637 [2024-06-04 14:55:09,673 INFO L175 Difference]: Start difference. First operand has 164 places, 140 transitions, 1225 flow. Second operand 9 states and 96 transitions. [2024-06-04 14:55:09,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 152 transitions, 1569 flow [2024-06-04 14:55:09,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 152 transitions, 1515 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-04 14:55:09,738 INFO L231 Difference]: Finished difference. Result has 167 places, 141 transitions, 1223 flow [2024-06-04 14:55:09,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1171, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1223, PETRI_PLACES=167, PETRI_TRANSITIONS=141} [2024-06-04 14:55:09,739 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 137 predicate places. [2024-06-04 14:55:09,739 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 141 transitions, 1223 flow [2024-06-04 14:55:09,739 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) [2024-06-04 14:55:09,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:09,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:09,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-04 14:55:09,739 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)] === [2024-06-04 14:55:09,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:09,740 INFO L85 PathProgramCache]: Analyzing trace with hash -978211260, now seen corresponding path program 10 times [2024-06-04 14:55:09,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:09,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152111198] [2024-06-04 14:55:09,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:09,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:09,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:10,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:10,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:10,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152111198] [2024-06-04 14:55:10,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152111198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:10,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:10,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:55:10,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143311219] [2024-06-04 14:55:10,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:10,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:55:10,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:10,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:55:10,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:55:10,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:55:10,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 141 transitions, 1223 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) [2024-06-04 14:55:10,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:10,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:55:10,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:11,160 INFO L124 PetriNetUnfolderBase]: 402/733 cut-off events. [2024-06-04 14:55:11,160 INFO L125 PetriNetUnfolderBase]: For 34645/34645 co-relation queries the response was YES. [2024-06-04 14:55:11,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4301 conditions, 733 events. 402/733 cut-off events. For 34645/34645 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 3434 event pairs, 54 based on Foata normal form. 2/735 useless extension candidates. Maximal degree in co-relation 4221. Up to 672 conditions per place. [2024-06-04 14:55:11,164 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 136 selfloop transitions, 24 changer transitions 0/162 dead transitions. [2024-06-04 14:55:11,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 162 transitions, 1657 flow [2024-06-04 14:55:11,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 14:55:11,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 14:55:11,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 131 transitions. [2024-06-04 14:55:11,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3521505376344086 [2024-06-04 14:55:11,165 INFO L175 Difference]: Start difference. First operand has 167 places, 141 transitions, 1223 flow. Second operand 12 states and 131 transitions. [2024-06-04 14:55:11,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 162 transitions, 1657 flow [2024-06-04 14:55:11,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 162 transitions, 1615 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-04 14:55:11,231 INFO L231 Difference]: Finished difference. Result has 172 places, 145 transitions, 1306 flow [2024-06-04 14:55:11,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1181, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1306, PETRI_PLACES=172, PETRI_TRANSITIONS=145} [2024-06-04 14:55:11,232 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 142 predicate places. [2024-06-04 14:55:11,232 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 145 transitions, 1306 flow [2024-06-04 14:55:11,232 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) [2024-06-04 14:55:11,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:11,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:11,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-04 14:55:11,232 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)] === [2024-06-04 14:55:11,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:11,232 INFO L85 PathProgramCache]: Analyzing trace with hash -978413070, now seen corresponding path program 11 times [2024-06-04 14:55:11,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:11,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840981422] [2024-06-04 14:55:11,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:11,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:11,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:12,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:12,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:12,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840981422] [2024-06-04 14:55:12,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840981422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:12,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:12,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:55:12,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836075124] [2024-06-04 14:55:12,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:12,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:55:12,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:12,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:55:12,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:55:12,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:55:12,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 145 transitions, 1306 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) [2024-06-04 14:55:12,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:12,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:55:12,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:12,544 INFO L124 PetriNetUnfolderBase]: 408/743 cut-off events. [2024-06-04 14:55:12,544 INFO L125 PetriNetUnfolderBase]: For 36248/36248 co-relation queries the response was YES. [2024-06-04 14:55:12,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4429 conditions, 743 events. 408/743 cut-off events. For 36248/36248 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 3503 event pairs, 54 based on Foata normal form. 2/745 useless extension candidates. Maximal degree in co-relation 4348. Up to 682 conditions per place. [2024-06-04 14:55:12,548 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 137 selfloop transitions, 23 changer transitions 0/162 dead transitions. [2024-06-04 14:55:12,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 162 transitions, 1722 flow [2024-06-04 14:55:12,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:55:12,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:55:12,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-04 14:55:12,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-04 14:55:12,549 INFO L175 Difference]: Start difference. First operand has 172 places, 145 transitions, 1306 flow. Second operand 10 states and 115 transitions. [2024-06-04 14:55:12,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 162 transitions, 1722 flow [2024-06-04 14:55:12,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 162 transitions, 1634 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-06-04 14:55:12,629 INFO L231 Difference]: Finished difference. Result has 173 places, 147 transitions, 1327 flow [2024-06-04 14:55:12,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1218, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1327, PETRI_PLACES=173, PETRI_TRANSITIONS=147} [2024-06-04 14:55:12,629 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 143 predicate places. [2024-06-04 14:55:12,629 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 147 transitions, 1327 flow [2024-06-04 14:55:12,630 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) [2024-06-04 14:55:12,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:12,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:12,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-04 14:55:12,630 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)] === [2024-06-04 14:55:12,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:12,630 INFO L85 PathProgramCache]: Analyzing trace with hash 887008324, now seen corresponding path program 12 times [2024-06-04 14:55:12,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:12,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137150632] [2024-06-04 14:55:12,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:12,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:12,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:13,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:13,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:13,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137150632] [2024-06-04 14:55:13,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137150632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:13,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:13,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:55:13,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108350950] [2024-06-04 14:55:13,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:13,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:55:13,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:13,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:55:13,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:55:13,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:55:13,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 147 transitions, 1327 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) [2024-06-04 14:55:13,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:13,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:55:13,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:13,941 INFO L124 PetriNetUnfolderBase]: 414/753 cut-off events. [2024-06-04 14:55:13,942 INFO L125 PetriNetUnfolderBase]: For 37507/37507 co-relation queries the response was YES. [2024-06-04 14:55:13,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4505 conditions, 753 events. 414/753 cut-off events. For 37507/37507 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 3549 event pairs, 54 based on Foata normal form. 2/755 useless extension candidates. Maximal degree in co-relation 4423. Up to 660 conditions per place. [2024-06-04 14:55:13,948 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 128 selfloop transitions, 34 changer transitions 0/164 dead transitions. [2024-06-04 14:55:13,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 164 transitions, 1751 flow [2024-06-04 14:55:13,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:55:13,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:55:13,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 118 transitions. [2024-06-04 14:55:13,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38064516129032255 [2024-06-04 14:55:13,949 INFO L175 Difference]: Start difference. First operand has 173 places, 147 transitions, 1327 flow. Second operand 10 states and 118 transitions. [2024-06-04 14:55:13,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 164 transitions, 1751 flow [2024-06-04 14:55:14,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 164 transitions, 1666 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-04 14:55:14,016 INFO L231 Difference]: Finished difference. Result has 175 places, 149 transitions, 1377 flow [2024-06-04 14:55:14,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1242, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1377, PETRI_PLACES=175, PETRI_TRANSITIONS=149} [2024-06-04 14:55:14,016 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 145 predicate places. [2024-06-04 14:55:14,016 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 149 transitions, 1377 flow [2024-06-04 14:55:14,016 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) [2024-06-04 14:55:14,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:14,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:14,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-04 14:55:14,017 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)] === [2024-06-04 14:55:14,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:14,017 INFO L85 PathProgramCache]: Analyzing trace with hash 887008169, now seen corresponding path program 11 times [2024-06-04 14:55:14,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:14,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674559179] [2024-06-04 14:55:14,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:14,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:14,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:14,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:14,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:14,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674559179] [2024-06-04 14:55:14,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674559179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:14,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:14,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:55:14,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870799572] [2024-06-04 14:55:14,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:14,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:55:14,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:14,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:55:14,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:55:14,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:55:14,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 149 transitions, 1377 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) [2024-06-04 14:55:14,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:14,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:55:14,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:15,206 INFO L124 PetriNetUnfolderBase]: 418/761 cut-off events. [2024-06-04 14:55:15,206 INFO L125 PetriNetUnfolderBase]: For 38826/38826 co-relation queries the response was YES. [2024-06-04 14:55:15,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4559 conditions, 761 events. 418/761 cut-off events. For 38826/38826 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 3605 event pairs, 62 based on Foata normal form. 2/763 useless extension candidates. Maximal degree in co-relation 4476. Up to 725 conditions per place. [2024-06-04 14:55:15,211 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 141 selfloop transitions, 18 changer transitions 0/161 dead transitions. [2024-06-04 14:55:15,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 161 transitions, 1738 flow [2024-06-04 14:55:15,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:55:15,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:55:15,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 107 transitions. [2024-06-04 14:55:15,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34516129032258064 [2024-06-04 14:55:15,212 INFO L175 Difference]: Start difference. First operand has 175 places, 149 transitions, 1377 flow. Second operand 10 states and 107 transitions. [2024-06-04 14:55:15,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 161 transitions, 1738 flow [2024-06-04 14:55:15,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 161 transitions, 1627 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-04 14:55:15,281 INFO L231 Difference]: Finished difference. Result has 177 places, 150 transitions, 1327 flow [2024-06-04 14:55:15,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1266, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1327, PETRI_PLACES=177, PETRI_TRANSITIONS=150} [2024-06-04 14:55:15,281 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 147 predicate places. [2024-06-04 14:55:15,281 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 150 transitions, 1327 flow [2024-06-04 14:55:15,281 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) [2024-06-04 14:55:15,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:15,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:15,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-04 14:55:15,282 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)] === [2024-06-04 14:55:15,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:15,282 INFO L85 PathProgramCache]: Analyzing trace with hash -637985038, now seen corresponding path program 13 times [2024-06-04 14:55:15,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:15,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685630176] [2024-06-04 14:55:15,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:15,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:15,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:16,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:16,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:16,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685630176] [2024-06-04 14:55:16,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685630176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:16,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:16,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:55:16,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315129645] [2024-06-04 14:55:16,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:16,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:55:16,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:16,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:55:16,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:55:16,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:55:16,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 150 transitions, 1327 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) [2024-06-04 14:55:16,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:16,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:55:16,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:16,576 INFO L124 PetriNetUnfolderBase]: 430/781 cut-off events. [2024-06-04 14:55:16,576 INFO L125 PetriNetUnfolderBase]: For 40075/40075 co-relation queries the response was YES. [2024-06-04 14:55:16,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4642 conditions, 781 events. 430/781 cut-off events. For 40075/40075 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 3726 event pairs, 60 based on Foata normal form. 2/783 useless extension candidates. Maximal degree in co-relation 4558. Up to 732 conditions per place. [2024-06-04 14:55:16,581 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 147 selfloop transitions, 19 changer transitions 0/168 dead transitions. [2024-06-04 14:55:16,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 168 transitions, 1777 flow [2024-06-04 14:55:16,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:55:16,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:55:16,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 111 transitions. [2024-06-04 14:55:16,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3580645161290323 [2024-06-04 14:55:16,582 INFO L175 Difference]: Start difference. First operand has 177 places, 150 transitions, 1327 flow. Second operand 10 states and 111 transitions. [2024-06-04 14:55:16,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 168 transitions, 1777 flow [2024-06-04 14:55:16,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 168 transitions, 1727 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-04 14:55:16,667 INFO L231 Difference]: Finished difference. Result has 179 places, 154 transitions, 1404 flow [2024-06-04 14:55:16,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1277, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1404, PETRI_PLACES=179, PETRI_TRANSITIONS=154} [2024-06-04 14:55:16,668 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 149 predicate places. [2024-06-04 14:55:16,668 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 154 transitions, 1404 flow [2024-06-04 14:55:16,668 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) [2024-06-04 14:55:16,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:16,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:16,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-04 14:55:16,669 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)] === [2024-06-04 14:55:16,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:16,669 INFO L85 PathProgramCache]: Analyzing trace with hash -381274782, now seen corresponding path program 5 times [2024-06-04 14:55:16,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:16,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054657353] [2024-06-04 14:55:16,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:16,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:16,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:17,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:17,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:17,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054657353] [2024-06-04 14:55:17,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054657353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:17,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:17,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:55:17,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784307802] [2024-06-04 14:55:17,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:17,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:55:17,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:17,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:55:17,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:55:17,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:55:17,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 154 transitions, 1404 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) [2024-06-04 14:55:17,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:17,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:55:17,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:17,890 INFO L124 PetriNetUnfolderBase]: 427/776 cut-off events. [2024-06-04 14:55:17,890 INFO L125 PetriNetUnfolderBase]: For 37844/37844 co-relation queries the response was YES. [2024-06-04 14:55:17,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4506 conditions, 776 events. 427/776 cut-off events. For 37844/37844 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 3694 event pairs, 61 based on Foata normal form. 2/778 useless extension candidates. Maximal degree in co-relation 4421. Up to 738 conditions per place. [2024-06-04 14:55:17,894 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 147 selfloop transitions, 16 changer transitions 0/165 dead transitions. [2024-06-04 14:55:17,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 165 transitions, 1756 flow [2024-06-04 14:55:17,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:55:17,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:55:17,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 98 transitions. [2024-06-04 14:55:17,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35125448028673834 [2024-06-04 14:55:17,895 INFO L175 Difference]: Start difference. First operand has 179 places, 154 transitions, 1404 flow. Second operand 9 states and 98 transitions. [2024-06-04 14:55:17,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 165 transitions, 1756 flow [2024-06-04 14:55:17,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 165 transitions, 1671 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-04 14:55:17,971 INFO L231 Difference]: Finished difference. Result has 181 places, 154 transitions, 1356 flow [2024-06-04 14:55:17,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1319, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1356, PETRI_PLACES=181, PETRI_TRANSITIONS=154} [2024-06-04 14:55:17,971 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 151 predicate places. [2024-06-04 14:55:17,971 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 154 transitions, 1356 flow [2024-06-04 14:55:17,972 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) [2024-06-04 14:55:17,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:17,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:17,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-04 14:55:17,972 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)] === [2024-06-04 14:55:17,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:17,972 INFO L85 PathProgramCache]: Analyzing trace with hash -913886744, now seen corresponding path program 14 times [2024-06-04 14:55:17,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:17,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835134267] [2024-06-04 14:55:17,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:17,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:17,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:18,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:18,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:18,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835134267] [2024-06-04 14:55:18,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835134267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:18,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:18,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:55:18,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119211488] [2024-06-04 14:55:18,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:18,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:55:18,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:18,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:55:18,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:55:18,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:55:18,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 154 transitions, 1356 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) [2024-06-04 14:55:18,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:18,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:55:18,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:19,285 INFO L124 PetriNetUnfolderBase]: 423/770 cut-off events. [2024-06-04 14:55:19,285 INFO L125 PetriNetUnfolderBase]: For 34952/34952 co-relation queries the response was YES. [2024-06-04 14:55:19,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4290 conditions, 770 events. 423/770 cut-off events. For 34952/34952 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 3670 event pairs, 58 based on Foata normal form. 2/772 useless extension candidates. Maximal degree in co-relation 4204. Up to 722 conditions per place. [2024-06-04 14:55:19,290 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 146 selfloop transitions, 19 changer transitions 0/167 dead transitions. [2024-06-04 14:55:19,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 167 transitions, 1720 flow [2024-06-04 14:55:19,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:55:19,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:55:19,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 109 transitions. [2024-06-04 14:55:19,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35161290322580646 [2024-06-04 14:55:19,291 INFO L175 Difference]: Start difference. First operand has 181 places, 154 transitions, 1356 flow. Second operand 10 states and 109 transitions. [2024-06-04 14:55:19,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 167 transitions, 1720 flow [2024-06-04 14:55:19,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 167 transitions, 1662 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-04 14:55:19,366 INFO L231 Difference]: Finished difference. Result has 183 places, 154 transitions, 1341 flow [2024-06-04 14:55:19,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1298, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1341, PETRI_PLACES=183, PETRI_TRANSITIONS=154} [2024-06-04 14:55:19,367 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 153 predicate places. [2024-06-04 14:55:19,367 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 154 transitions, 1341 flow [2024-06-04 14:55:19,367 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) [2024-06-04 14:55:19,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:19,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:19,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-04 14:55:19,368 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)] === [2024-06-04 14:55:19,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:19,368 INFO L85 PathProgramCache]: Analyzing trace with hash -637990773, now seen corresponding path program 12 times [2024-06-04 14:55:19,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:19,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292077296] [2024-06-04 14:55:19,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:19,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:19,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:20,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:20,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:20,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292077296] [2024-06-04 14:55:20,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292077296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:20,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:20,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:55:20,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10045631] [2024-06-04 14:55:20,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:20,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:55:20,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:20,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:55:20,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:55:20,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:55:20,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 154 transitions, 1341 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) [2024-06-04 14:55:20,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:20,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:55:20,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:20,486 INFO L124 PetriNetUnfolderBase]: 420/765 cut-off events. [2024-06-04 14:55:20,486 INFO L125 PetriNetUnfolderBase]: For 32017/32017 co-relation queries the response was YES. [2024-06-04 14:55:20,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4115 conditions, 765 events. 420/765 cut-off events. For 32017/32017 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 3640 event pairs, 57 based on Foata normal form. 2/767 useless extension candidates. Maximal degree in co-relation 4029. Up to 735 conditions per place. [2024-06-04 14:55:20,493 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 148 selfloop transitions, 15 changer transitions 0/165 dead transitions. [2024-06-04 14:55:20,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 165 transitions, 1691 flow [2024-06-04 14:55:20,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:55:20,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:55:20,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 105 transitions. [2024-06-04 14:55:20,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3387096774193548 [2024-06-04 14:55:20,494 INFO L175 Difference]: Start difference. First operand has 183 places, 154 transitions, 1341 flow. Second operand 10 states and 105 transitions. [2024-06-04 14:55:20,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 165 transitions, 1691 flow [2024-06-04 14:55:20,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 165 transitions, 1524 flow, removed 18 selfloop flow, removed 10 redundant places. [2024-06-04 14:55:20,574 INFO L231 Difference]: Finished difference. Result has 183 places, 154 transitions, 1208 flow [2024-06-04 14:55:20,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1174, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1208, PETRI_PLACES=183, PETRI_TRANSITIONS=154} [2024-06-04 14:55:20,574 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 153 predicate places. [2024-06-04 14:55:20,574 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 154 transitions, 1208 flow [2024-06-04 14:55:20,575 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) [2024-06-04 14:55:20,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:20,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:20,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-04 14:55:20,575 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)] === [2024-06-04 14:55:20,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:20,576 INFO L85 PathProgramCache]: Analyzing trace with hash -784479240, now seen corresponding path program 15 times [2024-06-04 14:55:20,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:20,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522463753] [2024-06-04 14:55:20,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:20,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:20,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:21,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:21,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:21,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522463753] [2024-06-04 14:55:21,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522463753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:21,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:21,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:55:21,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152162596] [2024-06-04 14:55:21,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:21,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:55:21,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:21,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:55:21,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:55:21,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:55:21,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 154 transitions, 1208 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) [2024-06-04 14:55:21,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:21,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:55:21,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:21,913 INFO L124 PetriNetUnfolderBase]: 426/775 cut-off events. [2024-06-04 14:55:21,913 INFO L125 PetriNetUnfolderBase]: For 32959/32959 co-relation queries the response was YES. [2024-06-04 14:55:21,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4008 conditions, 775 events. 426/775 cut-off events. For 32959/32959 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 3709 event pairs, 52 based on Foata normal form. 2/777 useless extension candidates. Maximal degree in co-relation 3922. Up to 673 conditions per place. [2024-06-04 14:55:21,918 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 135 selfloop transitions, 34 changer transitions 0/171 dead transitions. [2024-06-04 14:55:21,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 171 transitions, 1774 flow [2024-06-04 14:55:21,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:55:21,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:55:21,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-04 14:55:21,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-04 14:55:21,919 INFO L175 Difference]: Start difference. First operand has 183 places, 154 transitions, 1208 flow. Second operand 10 states and 115 transitions. [2024-06-04 14:55:21,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 171 transitions, 1774 flow [2024-06-04 14:55:21,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 171 transitions, 1686 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-04 14:55:21,986 INFO L231 Difference]: Finished difference. Result has 183 places, 156 transitions, 1255 flow [2024-06-04 14:55:21,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1120, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1255, PETRI_PLACES=183, PETRI_TRANSITIONS=156} [2024-06-04 14:55:21,987 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 153 predicate places. [2024-06-04 14:55:21,987 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 156 transitions, 1255 flow [2024-06-04 14:55:21,987 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) [2024-06-04 14:55:21,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:21,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:21,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-04 14:55:21,988 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)] === [2024-06-04 14:55:21,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:21,988 INFO L85 PathProgramCache]: Analyzing trace with hash -637783228, now seen corresponding path program 16 times [2024-06-04 14:55:21,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:21,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542214362] [2024-06-04 14:55:21,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:21,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:21,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:22,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:22,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:22,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542214362] [2024-06-04 14:55:22,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542214362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:22,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:22,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:55:22,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638236306] [2024-06-04 14:55:22,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:22,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:55:22,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:22,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:55:22,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:55:22,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:55:22,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 156 transitions, 1255 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) [2024-06-04 14:55:22,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:22,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:55:22,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:23,262 INFO L124 PetriNetUnfolderBase]: 422/769 cut-off events. [2024-06-04 14:55:23,262 INFO L125 PetriNetUnfolderBase]: For 29880/29880 co-relation queries the response was YES. [2024-06-04 14:55:23,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3836 conditions, 769 events. 422/769 cut-off events. For 29880/29880 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 3699 event pairs, 56 based on Foata normal form. 2/771 useless extension candidates. Maximal degree in co-relation 3749. Up to 720 conditions per place. [2024-06-04 14:55:23,267 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 148 selfloop transitions, 19 changer transitions 0/169 dead transitions. [2024-06-04 14:55:23,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 169 transitions, 1623 flow [2024-06-04 14:55:23,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:55:23,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:55:23,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-04 14:55:23,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-04 14:55:23,268 INFO L175 Difference]: Start difference. First operand has 183 places, 156 transitions, 1255 flow. Second operand 10 states and 110 transitions. [2024-06-04 14:55:23,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 169 transitions, 1623 flow [2024-06-04 14:55:23,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 169 transitions, 1434 flow, removed 51 selfloop flow, removed 8 redundant places. [2024-06-04 14:55:23,341 INFO L231 Difference]: Finished difference. Result has 185 places, 156 transitions, 1109 flow [2024-06-04 14:55:23,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1109, PETRI_PLACES=185, PETRI_TRANSITIONS=156} [2024-06-04 14:55:23,341 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 155 predicate places. [2024-06-04 14:55:23,341 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 156 transitions, 1109 flow [2024-06-04 14:55:23,341 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) [2024-06-04 14:55:23,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:23,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:23,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-04 14:55:23,342 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)] === [2024-06-04 14:55:23,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:23,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1721317622, now seen corresponding path program 1 times [2024-06-04 14:55:23,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:23,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242170297] [2024-06-04 14:55:23,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:23,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:23,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:24,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:24,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:24,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242170297] [2024-06-04 14:55:24,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242170297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:24,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:24,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:55:24,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535222724] [2024-06-04 14:55:24,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:24,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:55:24,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:24,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:55:24,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:55:24,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:55:24,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 156 transitions, 1109 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:24,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:24,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:55:24,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:24,590 INFO L124 PetriNetUnfolderBase]: 449/830 cut-off events. [2024-06-04 14:55:24,590 INFO L125 PetriNetUnfolderBase]: For 54571/54571 co-relation queries the response was YES. [2024-06-04 14:55:24,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4147 conditions, 830 events. 449/830 cut-off events. For 54571/54571 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 4031 event pairs, 61 based on Foata normal form. 8/838 useless extension candidates. Maximal degree in co-relation 4060. Up to 307 conditions per place. [2024-06-04 14:55:24,595 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 88 selfloop transitions, 79 changer transitions 15/184 dead transitions. [2024-06-04 14:55:24,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 184 transitions, 1689 flow [2024-06-04 14:55:24,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:55:24,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:55:24,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 128 transitions. [2024-06-04 14:55:24,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4129032258064516 [2024-06-04 14:55:24,596 INFO L175 Difference]: Start difference. First operand has 185 places, 156 transitions, 1109 flow. Second operand 10 states and 128 transitions. [2024-06-04 14:55:24,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 184 transitions, 1689 flow [2024-06-04 14:55:24,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 184 transitions, 1545 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-04 14:55:24,677 INFO L231 Difference]: Finished difference. Result has 183 places, 153 transitions, 1111 flow [2024-06-04 14:55:24,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=965, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1111, PETRI_PLACES=183, PETRI_TRANSITIONS=153} [2024-06-04 14:55:24,678 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 153 predicate places. [2024-06-04 14:55:24,678 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 153 transitions, 1111 flow [2024-06-04 14:55:24,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:24,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:24,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:24,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-04 14:55:24,678 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)] === [2024-06-04 14:55:24,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:24,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1779525392, now seen corresponding path program 2 times [2024-06-04 14:55:24,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:24,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377883391] [2024-06-04 14:55:24,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:24,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:24,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:25,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:25,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:25,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377883391] [2024-06-04 14:55:25,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377883391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:25,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:25,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:55:25,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754226463] [2024-06-04 14:55:25,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:25,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:55:25,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:25,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:55:25,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:55:25,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:55:25,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 153 transitions, 1111 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:25,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:25,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:55:25,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:26,069 INFO L124 PetriNetUnfolderBase]: 466/869 cut-off events. [2024-06-04 14:55:26,069 INFO L125 PetriNetUnfolderBase]: For 77886/77886 co-relation queries the response was YES. [2024-06-04 14:55:26,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4953 conditions, 869 events. 466/869 cut-off events. For 77886/77886 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 4318 event pairs, 74 based on Foata normal form. 8/877 useless extension candidates. Maximal degree in co-relation 4867. Up to 477 conditions per place. [2024-06-04 14:55:26,076 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 98 selfloop transitions, 72 changer transitions 10/182 dead transitions. [2024-06-04 14:55:26,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 182 transitions, 1707 flow [2024-06-04 14:55:26,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:55:26,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:55:26,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 130 transitions. [2024-06-04 14:55:26,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-04 14:55:26,077 INFO L175 Difference]: Start difference. First operand has 183 places, 153 transitions, 1111 flow. Second operand 10 states and 130 transitions. [2024-06-04 14:55:26,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 182 transitions, 1707 flow [2024-06-04 14:55:26,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 182 transitions, 1580 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-04 14:55:26,173 INFO L231 Difference]: Finished difference. Result has 180 places, 151 transitions, 1125 flow [2024-06-04 14:55:26,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=990, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1125, PETRI_PLACES=180, PETRI_TRANSITIONS=151} [2024-06-04 14:55:26,174 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 150 predicate places. [2024-06-04 14:55:26,174 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 151 transitions, 1125 flow [2024-06-04 14:55:26,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:26,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:26,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:26,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-04 14:55:26,174 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)] === [2024-06-04 14:55:26,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:26,175 INFO L85 PathProgramCache]: Analyzing trace with hash -308297994, now seen corresponding path program 3 times [2024-06-04 14:55:26,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:26,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256668870] [2024-06-04 14:55:26,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:26,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:26,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:26,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:26,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:26,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256668870] [2024-06-04 14:55:26,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256668870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:26,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:26,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:55:26,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796903808] [2024-06-04 14:55:26,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:26,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:55:26,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:26,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:55:26,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:55:27,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:55:27,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 151 transitions, 1125 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:27,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:27,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:55:27,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:27,454 INFO L124 PetriNetUnfolderBase]: 435/808 cut-off events. [2024-06-04 14:55:27,454 INFO L125 PetriNetUnfolderBase]: For 57111/57111 co-relation queries the response was YES. [2024-06-04 14:55:27,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4178 conditions, 808 events. 435/808 cut-off events. For 57111/57111 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 3937 event pairs, 65 based on Foata normal form. 10/818 useless extension candidates. Maximal degree in co-relation 4094. Up to 444 conditions per place. [2024-06-04 14:55:27,460 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 80 selfloop transitions, 77 changer transitions 16/175 dead transitions. [2024-06-04 14:55:27,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 175 transitions, 1551 flow [2024-06-04 14:55:27,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:55:27,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:55:27,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 126 transitions. [2024-06-04 14:55:27,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4064516129032258 [2024-06-04 14:55:27,461 INFO L175 Difference]: Start difference. First operand has 180 places, 151 transitions, 1125 flow. Second operand 10 states and 126 transitions. [2024-06-04 14:55:27,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 175 transitions, 1551 flow [2024-06-04 14:55:27,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 175 transitions, 1405 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-04 14:55:27,545 INFO L231 Difference]: Finished difference. Result has 179 places, 147 transitions, 1111 flow [2024-06-04 14:55:27,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=979, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1111, PETRI_PLACES=179, PETRI_TRANSITIONS=147} [2024-06-04 14:55:27,546 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 149 predicate places. [2024-06-04 14:55:27,546 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 147 transitions, 1111 flow [2024-06-04 14:55:27,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:27,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:27,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:27,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-04 14:55:27,546 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)] === [2024-06-04 14:55:27,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:27,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1779410072, now seen corresponding path program 4 times [2024-06-04 14:55:27,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:27,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084786077] [2024-06-04 14:55:27,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:27,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:27,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:28,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:28,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:28,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084786077] [2024-06-04 14:55:28,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084786077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:28,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:28,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:55:28,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849845671] [2024-06-04 14:55:28,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:28,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:55:28,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:28,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:55:28,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:55:28,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:55:28,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 147 transitions, 1111 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:28,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:28,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:55:28,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:28,712 INFO L124 PetriNetUnfolderBase]: 422/785 cut-off events. [2024-06-04 14:55:28,713 INFO L125 PetriNetUnfolderBase]: For 51365/51365 co-relation queries the response was YES. [2024-06-04 14:55:28,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4087 conditions, 785 events. 422/785 cut-off events. For 51365/51365 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 3779 event pairs, 59 based on Foata normal form. 8/793 useless extension candidates. Maximal degree in co-relation 4004. Up to 426 conditions per place. [2024-06-04 14:55:28,717 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 74 selfloop transitions, 75 changer transitions 20/171 dead transitions. [2024-06-04 14:55:28,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 171 transitions, 1521 flow [2024-06-04 14:55:28,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:55:28,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:55:28,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-04 14:55:28,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-04 14:55:28,718 INFO L175 Difference]: Start difference. First operand has 179 places, 147 transitions, 1111 flow. Second operand 10 states and 124 transitions. [2024-06-04 14:55:28,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 171 transitions, 1521 flow [2024-06-04 14:55:28,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 171 transitions, 1361 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-04 14:55:28,781 INFO L231 Difference]: Finished difference. Result has 174 places, 143 transitions, 1081 flow [2024-06-04 14:55:28,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=951, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1081, PETRI_PLACES=174, PETRI_TRANSITIONS=143} [2024-06-04 14:55:28,782 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 144 predicate places. [2024-06-04 14:55:28,782 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 143 transitions, 1081 flow [2024-06-04 14:55:28,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:28,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:28,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:28,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-04 14:55:28,782 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)] === [2024-06-04 14:55:28,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:28,783 INFO L85 PathProgramCache]: Analyzing trace with hash 176472856, now seen corresponding path program 5 times [2024-06-04 14:55:28,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:28,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727291467] [2024-06-04 14:55:28,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:28,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:28,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:29,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:29,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:29,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727291467] [2024-06-04 14:55:29,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727291467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:29,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:29,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:55:29,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144838180] [2024-06-04 14:55:29,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:29,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:55:29,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:29,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:55:29,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:55:29,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:55:29,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 143 transitions, 1081 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:29,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:29,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:55:29,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:30,014 INFO L124 PetriNetUnfolderBase]: 440/823 cut-off events. [2024-06-04 14:55:30,014 INFO L125 PetriNetUnfolderBase]: For 66584/66584 co-relation queries the response was YES. [2024-06-04 14:55:30,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4771 conditions, 823 events. 440/823 cut-off events. For 66584/66584 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 4021 event pairs, 68 based on Foata normal form. 8/831 useless extension candidates. Maximal degree in co-relation 4690. Up to 543 conditions per place. [2024-06-04 14:55:30,021 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 113 selfloop transitions, 44 changer transitions 10/169 dead transitions. [2024-06-04 14:55:30,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 169 transitions, 1633 flow [2024-06-04 14:55:30,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:55:30,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:55:30,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 129 transitions. [2024-06-04 14:55:30,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4161290322580645 [2024-06-04 14:55:30,022 INFO L175 Difference]: Start difference. First operand has 174 places, 143 transitions, 1081 flow. Second operand 10 states and 129 transitions. [2024-06-04 14:55:30,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 169 transitions, 1633 flow [2024-06-04 14:55:30,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 169 transitions, 1467 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-04 14:55:30,128 INFO L231 Difference]: Finished difference. Result has 168 places, 141 transitions, 1002 flow [2024-06-04 14:55:30,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=923, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1002, PETRI_PLACES=168, PETRI_TRANSITIONS=141} [2024-06-04 14:55:30,129 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 138 predicate places. [2024-06-04 14:55:30,129 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 141 transitions, 1002 flow [2024-06-04 14:55:30,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:30,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:30,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:30,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-04 14:55:30,129 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)] === [2024-06-04 14:55:30,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:30,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1946859822, now seen corresponding path program 6 times [2024-06-04 14:55:30,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:30,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884143785] [2024-06-04 14:55:30,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:30,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:30,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:31,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:31,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:31,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884143785] [2024-06-04 14:55:31,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884143785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:31,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:31,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:55:31,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530079559] [2024-06-04 14:55:31,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:31,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:55:31,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:31,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:55:31,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:55:31,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:55:31,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 141 transitions, 1002 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:31,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:31,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:55:31,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:31,428 INFO L124 PetriNetUnfolderBase]: 409/762 cut-off events. [2024-06-04 14:55:31,428 INFO L125 PetriNetUnfolderBase]: For 46901/46901 co-relation queries the response was YES. [2024-06-04 14:55:31,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3831 conditions, 762 events. 409/762 cut-off events. For 46901/46901 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 3640 event pairs, 57 based on Foata normal form. 10/772 useless extension candidates. Maximal degree in co-relation 3753. Up to 568 conditions per place. [2024-06-04 14:55:31,432 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 109 selfloop transitions, 35 changer transitions 16/162 dead transitions. [2024-06-04 14:55:31,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 162 transitions, 1394 flow [2024-06-04 14:55:31,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:55:31,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:55:31,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 121 transitions. [2024-06-04 14:55:31,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3903225806451613 [2024-06-04 14:55:31,433 INFO L175 Difference]: Start difference. First operand has 168 places, 141 transitions, 1002 flow. Second operand 10 states and 121 transitions. [2024-06-04 14:55:31,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 162 transitions, 1394 flow [2024-06-04 14:55:31,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 162 transitions, 1304 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-04 14:55:31,515 INFO L231 Difference]: Finished difference. Result has 167 places, 137 transitions, 958 flow [2024-06-04 14:55:31,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=912, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=958, PETRI_PLACES=167, PETRI_TRANSITIONS=137} [2024-06-04 14:55:31,516 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 137 predicate places. [2024-06-04 14:55:31,516 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 137 transitions, 958 flow [2024-06-04 14:55:31,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:31,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:31,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:31,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-04 14:55:31,517 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)] === [2024-06-04 14:55:31,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:31,517 INFO L85 PathProgramCache]: Analyzing trace with hash -701851794, now seen corresponding path program 7 times [2024-06-04 14:55:31,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:31,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393366738] [2024-06-04 14:55:31,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:31,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:31,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:32,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:32,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:32,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393366738] [2024-06-04 14:55:32,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393366738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:32,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:32,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:55:32,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331449409] [2024-06-04 14:55:32,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:32,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:55:32,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:32,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:55:32,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:55:32,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:55:32,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 137 transitions, 958 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:32,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:32,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:55:32,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:32,888 INFO L124 PetriNetUnfolderBase]: 425/798 cut-off events. [2024-06-04 14:55:32,888 INFO L125 PetriNetUnfolderBase]: For 57989/57989 co-relation queries the response was YES. [2024-06-04 14:55:32,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4450 conditions, 798 events. 425/798 cut-off events. For 57989/57989 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 3857 event pairs, 74 based on Foata normal form. 8/806 useless extension candidates. Maximal degree in co-relation 4373. Up to 497 conditions per place. [2024-06-04 14:55:32,892 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 106 selfloop transitions, 43 changer transitions 13/164 dead transitions. [2024-06-04 14:55:32,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 164 transitions, 1494 flow [2024-06-04 14:55:32,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:55:32,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:55:32,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 131 transitions. [2024-06-04 14:55:32,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42258064516129035 [2024-06-04 14:55:32,893 INFO L175 Difference]: Start difference. First operand has 167 places, 137 transitions, 958 flow. Second operand 10 states and 131 transitions. [2024-06-04 14:55:32,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 164 transitions, 1494 flow [2024-06-04 14:55:32,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 164 transitions, 1416 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-04 14:55:32,993 INFO L231 Difference]: Finished difference. Result has 163 places, 134 transitions, 956 flow [2024-06-04 14:55:32,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=884, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=956, PETRI_PLACES=163, PETRI_TRANSITIONS=134} [2024-06-04 14:55:32,994 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 133 predicate places. [2024-06-04 14:55:32,994 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 134 transitions, 956 flow [2024-06-04 14:55:32,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:32,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:32,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:32,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-04 14:55:32,995 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)] === [2024-06-04 14:55:32,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:32,995 INFO L85 PathProgramCache]: Analyzing trace with hash -701736474, now seen corresponding path program 8 times [2024-06-04 14:55:32,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:32,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711054262] [2024-06-04 14:55:32,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:32,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:33,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:34,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:34,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:34,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711054262] [2024-06-04 14:55:34,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711054262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:34,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:34,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:55:34,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472733219] [2024-06-04 14:55:34,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:34,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:55:34,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:34,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:55:34,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:55:34,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:55:34,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 134 transitions, 956 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:34,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:34,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:55:34,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:34,529 INFO L124 PetriNetUnfolderBase]: 418/785 cut-off events. [2024-06-04 14:55:34,529 INFO L125 PetriNetUnfolderBase]: For 56034/56034 co-relation queries the response was YES. [2024-06-04 14:55:34,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4409 conditions, 785 events. 418/785 cut-off events. For 56034/56034 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3790 event pairs, 67 based on Foata normal form. 8/793 useless extension candidates. Maximal degree in co-relation 4333. Up to 510 conditions per place. [2024-06-04 14:55:34,535 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 109 selfloop transitions, 41 changer transitions 10/162 dead transitions. [2024-06-04 14:55:34,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 162 transitions, 1499 flow [2024-06-04 14:55:34,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:55:34,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:55:34,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2024-06-04 14:55:34,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096774193548387 [2024-06-04 14:55:34,537 INFO L175 Difference]: Start difference. First operand has 163 places, 134 transitions, 956 flow. Second operand 10 states and 127 transitions. [2024-06-04 14:55:34,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 162 transitions, 1499 flow [2024-06-04 14:55:34,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 162 transitions, 1400 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-04 14:55:34,646 INFO L231 Difference]: Finished difference. Result has 161 places, 134 transitions, 987 flow [2024-06-04 14:55:34,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=867, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=987, PETRI_PLACES=161, PETRI_TRANSITIONS=134} [2024-06-04 14:55:34,647 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 131 predicate places. [2024-06-04 14:55:34,647 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 134 transitions, 987 flow [2024-06-04 14:55:34,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:34,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:34,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:34,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-04 14:55:34,648 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)] === [2024-06-04 14:55:34,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:34,648 INFO L85 PathProgramCache]: Analyzing trace with hash -701731824, now seen corresponding path program 9 times [2024-06-04 14:55:34,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:34,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669544848] [2024-06-04 14:55:34,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:34,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:34,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:35,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:35,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:35,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669544848] [2024-06-04 14:55:35,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669544848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:35,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:35,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:55:35,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219316699] [2024-06-04 14:55:35,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:35,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:55:35,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:35,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:55:35,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:55:35,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:55:35,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 134 transitions, 987 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:35,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:35,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:55:35,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:36,160 INFO L124 PetriNetUnfolderBase]: 387/724 cut-off events. [2024-06-04 14:55:36,160 INFO L125 PetriNetUnfolderBase]: For 40756/40756 co-relation queries the response was YES. [2024-06-04 14:55:36,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3705 conditions, 724 events. 387/724 cut-off events. For 40756/40756 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 3415 event pairs, 55 based on Foata normal form. 10/734 useless extension candidates. Maximal degree in co-relation 3630. Up to 515 conditions per place. [2024-06-04 14:55:36,164 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 102 selfloop transitions, 35 changer transitions 19/158 dead transitions. [2024-06-04 14:55:36,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 158 transitions, 1381 flow [2024-06-04 14:55:36,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 14:55:36,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 14:55:36,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 138 transitions. [2024-06-04 14:55:36,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-04 14:55:36,165 INFO L175 Difference]: Start difference. First operand has 161 places, 134 transitions, 987 flow. Second operand 12 states and 138 transitions. [2024-06-04 14:55:36,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 158 transitions, 1381 flow [2024-06-04 14:55:36,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 158 transitions, 1330 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-04 14:55:36,234 INFO L231 Difference]: Finished difference. Result has 163 places, 127 transitions, 965 flow [2024-06-04 14:55:36,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=936, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=965, PETRI_PLACES=163, PETRI_TRANSITIONS=127} [2024-06-04 14:55:36,235 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 133 predicate places. [2024-06-04 14:55:36,235 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 127 transitions, 965 flow [2024-06-04 14:55:36,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:36,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:36,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:36,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-04 14:55:36,236 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)] === [2024-06-04 14:55:36,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:36,236 INFO L85 PathProgramCache]: Analyzing trace with hash -702446440, now seen corresponding path program 10 times [2024-06-04 14:55:36,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:36,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586253934] [2024-06-04 14:55:36,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:36,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:36,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:37,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:37,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:37,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586253934] [2024-06-04 14:55:37,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586253934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:37,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:37,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:55:37,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712737494] [2024-06-04 14:55:37,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:37,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:55:37,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:37,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:55:37,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:55:37,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:55:37,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 127 transitions, 965 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:37,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:37,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:55:37,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:37,540 INFO L124 PetriNetUnfolderBase]: 368/679 cut-off events. [2024-06-04 14:55:37,540 INFO L125 PetriNetUnfolderBase]: For 50241/50241 co-relation queries the response was YES. [2024-06-04 14:55:37,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4046 conditions, 679 events. 368/679 cut-off events. For 50241/50241 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3091 event pairs, 56 based on Foata normal form. 8/687 useless extension candidates. Maximal degree in co-relation 3972. Up to 226 conditions per place. [2024-06-04 14:55:37,544 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 74 selfloop transitions, 65 changer transitions 10/151 dead transitions. [2024-06-04 14:55:37,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 151 transitions, 1459 flow [2024-06-04 14:55:37,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:55:37,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:55:37,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 122 transitions. [2024-06-04 14:55:37,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3935483870967742 [2024-06-04 14:55:37,545 INFO L175 Difference]: Start difference. First operand has 163 places, 127 transitions, 965 flow. Second operand 10 states and 122 transitions. [2024-06-04 14:55:37,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 151 transitions, 1459 flow [2024-06-04 14:55:37,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 151 transitions, 1342 flow, removed 8 selfloop flow, removed 14 redundant places. [2024-06-04 14:55:37,616 INFO L231 Difference]: Finished difference. Result has 151 places, 124 transitions, 973 flow [2024-06-04 14:55:37,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=856, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=973, PETRI_PLACES=151, PETRI_TRANSITIONS=124} [2024-06-04 14:55:37,616 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 121 predicate places. [2024-06-04 14:55:37,616 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 124 transitions, 973 flow [2024-06-04 14:55:37,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:37,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:37,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:37,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-04 14:55:37,617 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)] === [2024-06-04 14:55:37,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:37,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1640178908, now seen corresponding path program 11 times [2024-06-04 14:55:37,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:37,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168351576] [2024-06-04 14:55:37,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:37,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:37,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:38,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:38,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:38,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168351576] [2024-06-04 14:55:38,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168351576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:38,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:38,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:55:38,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783511663] [2024-06-04 14:55:38,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:38,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:55:38,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:38,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:55:38,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:55:38,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:55:38,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 124 transitions, 973 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) [2024-06-04 14:55:38,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:38,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:55:38,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:39,233 INFO L124 PetriNetUnfolderBase]: 374/697 cut-off events. [2024-06-04 14:55:39,233 INFO L125 PetriNetUnfolderBase]: For 57151/57151 co-relation queries the response was YES. [2024-06-04 14:55:39,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4076 conditions, 697 events. 374/697 cut-off events. For 57151/57151 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3263 event pairs, 76 based on Foata normal form. 18/715 useless extension candidates. Maximal degree in co-relation 4005. Up to 495 conditions per place. [2024-06-04 14:55:39,239 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 97 selfloop transitions, 31 changer transitions 16/146 dead transitions. [2024-06-04 14:55:39,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 146 transitions, 1343 flow [2024-06-04 14:55:39,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:55:39,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:55:39,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-06-04 14:55:39,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3812316715542522 [2024-06-04 14:55:39,240 INFO L175 Difference]: Start difference. First operand has 151 places, 124 transitions, 973 flow. Second operand 11 states and 130 transitions. [2024-06-04 14:55:39,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 146 transitions, 1343 flow [2024-06-04 14:55:39,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 146 transitions, 1236 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-04 14:55:39,315 INFO L231 Difference]: Finished difference. Result has 149 places, 119 transitions, 896 flow [2024-06-04 14:55:39,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=866, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=896, PETRI_PLACES=149, PETRI_TRANSITIONS=119} [2024-06-04 14:55:39,316 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 119 predicate places. [2024-06-04 14:55:39,316 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 119 transitions, 896 flow [2024-06-04 14:55:39,316 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) [2024-06-04 14:55:39,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:39,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:39,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-04 14:55:39,317 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)] === [2024-06-04 14:55:39,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:39,317 INFO L85 PathProgramCache]: Analyzing trace with hash -702326470, now seen corresponding path program 12 times [2024-06-04 14:55:39,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:39,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541211416] [2024-06-04 14:55:39,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:39,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:39,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:40,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:40,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:40,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541211416] [2024-06-04 14:55:40,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541211416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:40,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:40,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:55:40,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579196640] [2024-06-04 14:55:40,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:40,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:55:40,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:40,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:55:40,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:55:40,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:55:40,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 119 transitions, 896 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:40,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:40,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:55:40,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:40,811 INFO L124 PetriNetUnfolderBase]: 352/655 cut-off events. [2024-06-04 14:55:40,811 INFO L125 PetriNetUnfolderBase]: For 45959/45959 co-relation queries the response was YES. [2024-06-04 14:55:40,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3852 conditions, 655 events. 352/655 cut-off events. For 45959/45959 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3000 event pairs, 62 based on Foata normal form. 12/667 useless extension candidates. Maximal degree in co-relation 3783. Up to 389 conditions per place. [2024-06-04 14:55:40,814 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 68 selfloop transitions, 61 changer transitions 12/143 dead transitions. [2024-06-04 14:55:40,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 143 transitions, 1266 flow [2024-06-04 14:55:40,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 14:55:40,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 14:55:40,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 141 transitions. [2024-06-04 14:55:40,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3790322580645161 [2024-06-04 14:55:40,815 INFO L175 Difference]: Start difference. First operand has 149 places, 119 transitions, 896 flow. Second operand 12 states and 141 transitions. [2024-06-04 14:55:40,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 143 transitions, 1266 flow [2024-06-04 14:55:40,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 143 transitions, 1200 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-04 14:55:40,863 INFO L231 Difference]: Finished difference. Result has 147 places, 114 transitions, 928 flow [2024-06-04 14:55:40,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=830, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=928, PETRI_PLACES=147, PETRI_TRANSITIONS=114} [2024-06-04 14:55:40,864 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 117 predicate places. [2024-06-04 14:55:40,878 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 114 transitions, 928 flow [2024-06-04 14:55:40,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:40,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:40,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:40,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-04 14:55:40,879 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)] === [2024-06-04 14:55:40,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:40,879 INFO L85 PathProgramCache]: Analyzing trace with hash -702331120, now seen corresponding path program 13 times [2024-06-04 14:55:40,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:40,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053476429] [2024-06-04 14:55:40,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:40,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:40,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:41,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:41,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:41,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053476429] [2024-06-04 14:55:41,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053476429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:41,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:41,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:55:41,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224107521] [2024-06-04 14:55:41,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:41,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:55:41,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:41,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:55:41,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:55:41,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:55:41,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 114 transitions, 928 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:41,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:41,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:55:41,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:42,100 INFO L124 PetriNetUnfolderBase]: 332/623 cut-off events. [2024-06-04 14:55:42,100 INFO L125 PetriNetUnfolderBase]: For 39440/39440 co-relation queries the response was YES. [2024-06-04 14:55:42,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3781 conditions, 623 events. 332/623 cut-off events. For 39440/39440 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2831 event pairs, 54 based on Foata normal form. 8/631 useless extension candidates. Maximal degree in co-relation 3713. Up to 349 conditions per place. [2024-06-04 14:55:42,103 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 51 selfloop transitions, 67 changer transitions 12/132 dead transitions. [2024-06-04 14:55:42,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 132 transitions, 1246 flow [2024-06-04 14:55:42,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:55:42,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:55:42,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 118 transitions. [2024-06-04 14:55:42,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38064516129032255 [2024-06-04 14:55:42,104 INFO L175 Difference]: Start difference. First operand has 147 places, 114 transitions, 928 flow. Second operand 10 states and 118 transitions. [2024-06-04 14:55:42,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 132 transitions, 1246 flow [2024-06-04 14:55:42,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 132 transitions, 1116 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-04 14:55:42,152 INFO L231 Difference]: Finished difference. Result has 143 places, 110 transitions, 909 flow [2024-06-04 14:55:42,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=798, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=909, PETRI_PLACES=143, PETRI_TRANSITIONS=110} [2024-06-04 14:55:42,153 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 113 predicate places. [2024-06-04 14:55:42,153 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 110 transitions, 909 flow [2024-06-04 14:55:42,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:42,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:42,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:42,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-04 14:55:42,154 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)] === [2024-06-04 14:55:42,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:42,154 INFO L85 PathProgramCache]: Analyzing trace with hash 641772038, now seen corresponding path program 14 times [2024-06-04 14:55:42,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:42,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801143436] [2024-06-04 14:55:42,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:42,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:42,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:42,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:42,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:42,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801143436] [2024-06-04 14:55:42,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801143436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:42,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:42,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:55:42,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143230752] [2024-06-04 14:55:42,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:42,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:55:42,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:42,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:55:42,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:55:43,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:55:43,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 110 transitions, 909 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) [2024-06-04 14:55:43,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:43,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:55:43,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:43,460 INFO L124 PetriNetUnfolderBase]: 353/666 cut-off events. [2024-06-04 14:55:43,460 INFO L125 PetriNetUnfolderBase]: For 48257/48257 co-relation queries the response was YES. [2024-06-04 14:55:43,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4340 conditions, 666 events. 353/666 cut-off events. For 48257/48257 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3101 event pairs, 73 based on Foata normal form. 8/674 useless extension candidates. Maximal degree in co-relation 4273. Up to 398 conditions per place. [2024-06-04 14:55:43,464 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 84 selfloop transitions, 42 changer transitions 7/135 dead transitions. [2024-06-04 14:55:43,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 135 transitions, 1361 flow [2024-06-04 14:55:43,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:55:43,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:55:43,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2024-06-04 14:55:43,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39002932551319647 [2024-06-04 14:55:43,465 INFO L175 Difference]: Start difference. First operand has 143 places, 110 transitions, 909 flow. Second operand 11 states and 133 transitions. [2024-06-04 14:55:43,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 135 transitions, 1361 flow [2024-06-04 14:55:43,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 135 transitions, 1207 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-04 14:55:43,517 INFO L231 Difference]: Finished difference. Result has 138 places, 108 transitions, 839 flow [2024-06-04 14:55:43,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=765, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=839, PETRI_PLACES=138, PETRI_TRANSITIONS=108} [2024-06-04 14:55:43,517 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 108 predicate places. [2024-06-04 14:55:43,517 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 108 transitions, 839 flow [2024-06-04 14:55:43,518 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) [2024-06-04 14:55:43,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:43,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:43,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-04 14:55:43,518 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)] === [2024-06-04 14:55:43,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:43,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1640005928, now seen corresponding path program 15 times [2024-06-04 14:55:43,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:43,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807886954] [2024-06-04 14:55:43,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:43,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:43,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:44,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:44,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:44,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807886954] [2024-06-04 14:55:44,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807886954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:44,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:44,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:55:44,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44325974] [2024-06-04 14:55:44,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:44,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:55:44,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:44,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:55:44,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:55:44,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:55:44,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 108 transitions, 839 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) [2024-06-04 14:55:44,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:44,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:55:44,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:44,900 INFO L124 PetriNetUnfolderBase]: 351/664 cut-off events. [2024-06-04 14:55:44,900 INFO L125 PetriNetUnfolderBase]: For 44288/44288 co-relation queries the response was YES. [2024-06-04 14:55:44,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4117 conditions, 664 events. 351/664 cut-off events. For 44288/44288 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3109 event pairs, 75 based on Foata normal form. 10/674 useless extension candidates. Maximal degree in co-relation 4053. Up to 463 conditions per place. [2024-06-04 14:55:44,905 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 76 selfloop transitions, 38 changer transitions 13/129 dead transitions. [2024-06-04 14:55:44,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 129 transitions, 1165 flow [2024-06-04 14:55:44,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:55:44,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:55:44,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-06-04 14:55:44,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3812316715542522 [2024-06-04 14:55:44,907 INFO L175 Difference]: Start difference. First operand has 138 places, 108 transitions, 839 flow. Second operand 11 states and 130 transitions. [2024-06-04 14:55:44,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 129 transitions, 1165 flow [2024-06-04 14:55:44,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 129 transitions, 1081 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-04 14:55:44,952 INFO L231 Difference]: Finished difference. Result has 137 places, 103 transitions, 796 flow [2024-06-04 14:55:44,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=796, PETRI_PLACES=137, PETRI_TRANSITIONS=103} [2024-06-04 14:55:44,952 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 107 predicate places. [2024-06-04 14:55:44,952 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 103 transitions, 796 flow [2024-06-04 14:55:44,953 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) [2024-06-04 14:55:44,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:44,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:44,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-04 14:55:44,953 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)] === [2024-06-04 14:55:44,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:44,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1473767498, now seen corresponding path program 16 times [2024-06-04 14:55:44,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:44,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120343212] [2024-06-04 14:55:44,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:44,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:44,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:45,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:45,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:45,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120343212] [2024-06-04 14:55:45,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120343212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:45,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:45,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:55:45,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778044854] [2024-06-04 14:55:45,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:45,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:55:45,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:45,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:55:45,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:55:45,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:55:45,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 103 transitions, 796 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:45,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:45,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:55:45,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:46,139 INFO L124 PetriNetUnfolderBase]: 366/697 cut-off events. [2024-06-04 14:55:46,139 INFO L125 PetriNetUnfolderBase]: For 48944/48944 co-relation queries the response was YES. [2024-06-04 14:55:46,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4562 conditions, 697 events. 366/697 cut-off events. For 48944/48944 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3332 event pairs, 80 based on Foata normal form. 8/705 useless extension candidates. Maximal degree in co-relation 4499. Up to 444 conditions per place. [2024-06-04 14:55:46,143 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 74 selfloop transitions, 43 changer transitions 8/127 dead transitions. [2024-06-04 14:55:46,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 127 transitions, 1220 flow [2024-06-04 14:55:46,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:55:46,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:55:46,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-04 14:55:46,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-04 14:55:46,143 INFO L175 Difference]: Start difference. First operand has 137 places, 103 transitions, 796 flow. Second operand 10 states and 124 transitions. [2024-06-04 14:55:46,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 127 transitions, 1220 flow [2024-06-04 14:55:46,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 127 transitions, 1132 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-04 14:55:46,181 INFO L231 Difference]: Finished difference. Result has 131 places, 100 transitions, 781 flow [2024-06-04 14:55:46,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=714, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=781, PETRI_PLACES=131, PETRI_TRANSITIONS=100} [2024-06-04 14:55:46,182 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 101 predicate places. [2024-06-04 14:55:46,182 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 100 transitions, 781 flow [2024-06-04 14:55:46,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:46,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:46,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:46,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-04 14:55:46,182 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)] === [2024-06-04 14:55:46,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:46,182 INFO L85 PathProgramCache]: Analyzing trace with hash 648443362, now seen corresponding path program 1 times [2024-06-04 14:55:46,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:46,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18400988] [2024-06-04 14:55:46,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:46,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:46,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:47,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:47,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:47,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18400988] [2024-06-04 14:55:47,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18400988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:47,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:47,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:55:47,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192140248] [2024-06-04 14:55:47,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:47,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:55:47,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:47,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:55:47,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:55:47,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:55:47,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 100 transitions, 781 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) [2024-06-04 14:55:47,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:47,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:55:47,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:47,800 INFO L124 PetriNetUnfolderBase]: 351/664 cut-off events. [2024-06-04 14:55:47,800 INFO L125 PetriNetUnfolderBase]: For 39894/39894 co-relation queries the response was YES. [2024-06-04 14:55:47,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4380 conditions, 664 events. 351/664 cut-off events. For 39894/39894 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3111 event pairs, 79 based on Foata normal form. 2/666 useless extension candidates. Maximal degree in co-relation 4319. Up to 528 conditions per place. [2024-06-04 14:55:47,803 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 80 selfloop transitions, 33 changer transitions 0/115 dead transitions. [2024-06-04 14:55:47,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 115 transitions, 1053 flow [2024-06-04 14:55:47,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:55:47,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:55:47,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 112 transitions. [2024-06-04 14:55:47,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36129032258064514 [2024-06-04 14:55:47,804 INFO L175 Difference]: Start difference. First operand has 131 places, 100 transitions, 781 flow. Second operand 10 states and 112 transitions. [2024-06-04 14:55:47,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 115 transitions, 1053 flow [2024-06-04 14:55:47,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 115 transitions, 963 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-04 14:55:47,845 INFO L231 Difference]: Finished difference. Result has 128 places, 101 transitions, 773 flow [2024-06-04 14:55:47,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=691, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=773, PETRI_PLACES=128, PETRI_TRANSITIONS=101} [2024-06-04 14:55:47,845 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 98 predicate places. [2024-06-04 14:55:47,845 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 101 transitions, 773 flow [2024-06-04 14:55:47,845 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) [2024-06-04 14:55:47,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:47,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:47,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-04 14:55:47,846 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)] === [2024-06-04 14:55:47,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:47,846 INFO L85 PathProgramCache]: Analyzing trace with hash -697684840, now seen corresponding path program 17 times [2024-06-04 14:55:47,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:47,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116655108] [2024-06-04 14:55:47,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:47,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:47,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:48,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:48,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:48,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116655108] [2024-06-04 14:55:48,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116655108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:48,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:48,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:55:48,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113225607] [2024-06-04 14:55:48,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:48,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:55:48,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:48,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:55:48,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:55:49,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:55:49,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 101 transitions, 773 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:49,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:49,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:55:49,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:49,346 INFO L124 PetriNetUnfolderBase]: 338/641 cut-off events. [2024-06-04 14:55:49,346 INFO L125 PetriNetUnfolderBase]: For 34406/34406 co-relation queries the response was YES. [2024-06-04 14:55:49,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3828 conditions, 641 events. 338/641 cut-off events. For 34406/34406 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2973 event pairs, 71 based on Foata normal form. 10/651 useless extension candidates. Maximal degree in co-relation 3769. Up to 478 conditions per place. [2024-06-04 14:55:49,350 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 76 selfloop transitions, 31 changer transitions 11/120 dead transitions. [2024-06-04 14:55:49,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 120 transitions, 1075 flow [2024-06-04 14:55:49,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:55:49,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:55:49,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 116 transitions. [2024-06-04 14:55:49,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741935483870968 [2024-06-04 14:55:49,351 INFO L175 Difference]: Start difference. First operand has 128 places, 101 transitions, 773 flow. Second operand 10 states and 116 transitions. [2024-06-04 14:55:49,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 120 transitions, 1075 flow [2024-06-04 14:55:49,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 120 transitions, 1000 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-04 14:55:49,381 INFO L231 Difference]: Finished difference. Result has 130 places, 98 transitions, 737 flow [2024-06-04 14:55:49,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=698, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=737, PETRI_PLACES=130, PETRI_TRANSITIONS=98} [2024-06-04 14:55:49,382 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 100 predicate places. [2024-06-04 14:55:49,382 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 98 transitions, 737 flow [2024-06-04 14:55:49,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:49,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:49,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:49,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-04 14:55:49,383 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)] === [2024-06-04 14:55:49,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:49,383 INFO L85 PathProgramCache]: Analyzing trace with hash 648205778, now seen corresponding path program 18 times [2024-06-04 14:55:49,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:49,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853114937] [2024-06-04 14:55:49,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:49,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:49,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:50,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:50,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:50,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853114937] [2024-06-04 14:55:50,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853114937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:50,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:50,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:55:50,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143067086] [2024-06-04 14:55:50,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:50,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:55:50,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:50,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:55:50,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:55:50,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:55:50,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 98 transitions, 737 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) [2024-06-04 14:55:50,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:50,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:55:50,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:50,952 INFO L124 PetriNetUnfolderBase]: 299/568 cut-off events. [2024-06-04 14:55:50,952 INFO L125 PetriNetUnfolderBase]: For 28863/28863 co-relation queries the response was YES. [2024-06-04 14:55:50,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3205 conditions, 568 events. 299/568 cut-off events. For 28863/28863 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2528 event pairs, 70 based on Foata normal form. 10/578 useless extension candidates. Maximal degree in co-relation 3145. Up to 405 conditions per place. [2024-06-04 14:55:50,955 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 79 selfloop transitions, 26 changer transitions 11/118 dead transitions. [2024-06-04 14:55:50,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 118 transitions, 1037 flow [2024-06-04 14:55:50,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:55:50,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:55:50,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 124 transitions. [2024-06-04 14:55:50,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-04 14:55:50,957 INFO L175 Difference]: Start difference. First operand has 130 places, 98 transitions, 737 flow. Second operand 11 states and 124 transitions. [2024-06-04 14:55:50,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 118 transitions, 1037 flow [2024-06-04 14:55:50,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 118 transitions, 971 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-04 14:55:50,982 INFO L231 Difference]: Finished difference. Result has 128 places, 95 transitions, 701 flow [2024-06-04 14:55:50,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=671, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=701, PETRI_PLACES=128, PETRI_TRANSITIONS=95} [2024-06-04 14:55:50,982 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 98 predicate places. [2024-06-04 14:55:50,983 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 95 transitions, 701 flow [2024-06-04 14:55:50,983 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) [2024-06-04 14:55:50,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:50,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:50,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-04 14:55:50,983 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)] === [2024-06-04 14:55:50,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:50,984 INFO L85 PathProgramCache]: Analyzing trace with hash -524948996, now seen corresponding path program 2 times [2024-06-04 14:55:50,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:50,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787511212] [2024-06-04 14:55:50,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:50,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:50,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:52,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:52,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:52,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787511212] [2024-06-04 14:55:52,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787511212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:52,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:52,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:55:52,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840668743] [2024-06-04 14:55:52,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:52,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:55:52,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:52,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:55:52,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:55:52,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:55:52,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 95 transitions, 701 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) [2024-06-04 14:55:52,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:52,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:55:52,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:52,480 INFO L124 PetriNetUnfolderBase]: 277/526 cut-off events. [2024-06-04 14:55:52,480 INFO L125 PetriNetUnfolderBase]: For 21870/21870 co-relation queries the response was YES. [2024-06-04 14:55:52,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3012 conditions, 526 events. 277/526 cut-off events. For 21870/21870 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2272 event pairs, 62 based on Foata normal form. 2/528 useless extension candidates. Maximal degree in co-relation 2953. Up to 393 conditions per place. [2024-06-04 14:55:52,495 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 81 selfloop transitions, 29 changer transitions 0/112 dead transitions. [2024-06-04 14:55:52,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 112 transitions, 973 flow [2024-06-04 14:55:52,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:55:52,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:55:52,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 120 transitions. [2024-06-04 14:55:52,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3519061583577713 [2024-06-04 14:55:52,496 INFO L175 Difference]: Start difference. First operand has 128 places, 95 transitions, 701 flow. Second operand 11 states and 120 transitions. [2024-06-04 14:55:52,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 112 transitions, 973 flow [2024-06-04 14:55:52,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 112 transitions, 917 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-04 14:55:52,521 INFO L231 Difference]: Finished difference. Result has 125 places, 96 transitions, 721 flow [2024-06-04 14:55:52,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=645, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=721, PETRI_PLACES=125, PETRI_TRANSITIONS=96} [2024-06-04 14:55:52,522 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 95 predicate places. [2024-06-04 14:55:52,522 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 96 transitions, 721 flow [2024-06-04 14:55:52,522 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) [2024-06-04 14:55:52,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:52,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:52,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-04 14:55:52,523 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)] === [2024-06-04 14:55:52,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:52,523 INFO L85 PathProgramCache]: Analyzing trace with hash -820030858, now seen corresponding path program 19 times [2024-06-04 14:55:52,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:52,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322795100] [2024-06-04 14:55:52,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:52,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:52,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:53,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:53,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:53,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322795100] [2024-06-04 14:55:53,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322795100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:53,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:53,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:55:53,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956796046] [2024-06-04 14:55:53,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:53,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:55:53,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:53,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:55:53,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:55:53,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:55:53,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 96 transitions, 721 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) [2024-06-04 14:55:53,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:53,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:55:53,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:54,061 INFO L124 PetriNetUnfolderBase]: 293/562 cut-off events. [2024-06-04 14:55:54,061 INFO L125 PetriNetUnfolderBase]: For 26134/26134 co-relation queries the response was YES. [2024-06-04 14:55:54,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3113 conditions, 562 events. 293/562 cut-off events. For 26134/26134 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2514 event pairs, 68 based on Foata normal form. 10/572 useless extension candidates. Maximal degree in co-relation 3055. Up to 427 conditions per place. [2024-06-04 14:55:54,063 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 73 selfloop transitions, 31 changer transitions 11/117 dead transitions. [2024-06-04 14:55:54,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 117 transitions, 1023 flow [2024-06-04 14:55:54,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:55:54,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:55:54,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-06-04 14:55:54,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3812316715542522 [2024-06-04 14:55:54,065 INFO L175 Difference]: Start difference. First operand has 125 places, 96 transitions, 721 flow. Second operand 11 states and 130 transitions. [2024-06-04 14:55:54,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 117 transitions, 1023 flow [2024-06-04 14:55:54,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 117 transitions, 957 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-04 14:55:54,094 INFO L231 Difference]: Finished difference. Result has 127 places, 93 transitions, 700 flow [2024-06-04 14:55:54,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=700, PETRI_PLACES=127, PETRI_TRANSITIONS=93} [2024-06-04 14:55:54,094 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 97 predicate places. [2024-06-04 14:55:54,095 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 93 transitions, 700 flow [2024-06-04 14:55:54,095 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) [2024-06-04 14:55:54,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:54,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:54,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-04 14:55:54,095 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)] === [2024-06-04 14:55:54,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:54,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1734289812, now seen corresponding path program 3 times [2024-06-04 14:55:54,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:54,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718001477] [2024-06-04 14:55:54,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:54,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:54,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:55,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:55,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:55,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718001477] [2024-06-04 14:55:55,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718001477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:55,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:55,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:55:55,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671326523] [2024-06-04 14:55:55,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:55,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:55:55,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:55,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:55:55,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:55:55,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:55:55,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 93 transitions, 700 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) [2024-06-04 14:55:55,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:55,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:55:55,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:55,648 INFO L124 PetriNetUnfolderBase]: 273/522 cut-off events. [2024-06-04 14:55:55,649 INFO L125 PetriNetUnfolderBase]: For 21838/21838 co-relation queries the response was YES. [2024-06-04 14:55:55,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3006 conditions, 522 events. 273/522 cut-off events. For 21838/21838 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2265 event pairs, 72 based on Foata normal form. 2/524 useless extension candidates. Maximal degree in co-relation 2947. Up to 473 conditions per place. [2024-06-04 14:55:55,652 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 85 selfloop transitions, 20 changer transitions 0/107 dead transitions. [2024-06-04 14:55:55,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 107 transitions, 956 flow [2024-06-04 14:55:55,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:55:55,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:55:55,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 108 transitions. [2024-06-04 14:55:55,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34838709677419355 [2024-06-04 14:55:55,653 INFO L175 Difference]: Start difference. First operand has 127 places, 93 transitions, 700 flow. Second operand 10 states and 108 transitions. [2024-06-04 14:55:55,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 107 transitions, 956 flow [2024-06-04 14:55:55,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 107 transitions, 890 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-04 14:55:55,683 INFO L231 Difference]: Finished difference. Result has 124 places, 94 transitions, 695 flow [2024-06-04 14:55:55,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=634, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=695, PETRI_PLACES=124, PETRI_TRANSITIONS=94} [2024-06-04 14:55:55,684 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 94 predicate places. [2024-06-04 14:55:55,684 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 94 transitions, 695 flow [2024-06-04 14:55:55,684 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) [2024-06-04 14:55:55,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:55,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:55,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-04 14:55:55,684 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)] === [2024-06-04 14:55:55,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:55,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1734282868, now seen corresponding path program 20 times [2024-06-04 14:55:55,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:55,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824790500] [2024-06-04 14:55:55,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:55,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:55,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:56,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:56,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:56,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824790500] [2024-06-04 14:55:56,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824790500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:56,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:56,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:55:56,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311369404] [2024-06-04 14:55:56,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:56,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:55:56,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:56,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:55:56,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:55:56,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:55:56,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 94 transitions, 695 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) [2024-06-04 14:55:56,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:56,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:55:56,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:57,036 INFO L124 PetriNetUnfolderBase]: 260/499 cut-off events. [2024-06-04 14:55:57,036 INFO L125 PetriNetUnfolderBase]: For 19332/19332 co-relation queries the response was YES. [2024-06-04 14:55:57,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2523 conditions, 499 events. 260/499 cut-off events. For 19332/19332 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2135 event pairs, 57 based on Foata normal form. 10/509 useless extension candidates. Maximal degree in co-relation 2465. Up to 406 conditions per place. [2024-06-04 14:55:57,039 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 82 selfloop transitions, 17 changer transitions 12/113 dead transitions. [2024-06-04 14:55:57,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 113 transitions, 981 flow [2024-06-04 14:55:57,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:55:57,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:55:57,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 121 transitions. [2024-06-04 14:55:57,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-04 14:55:57,040 INFO L175 Difference]: Start difference. First operand has 124 places, 94 transitions, 695 flow. Second operand 11 states and 121 transitions. [2024-06-04 14:55:57,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 113 transitions, 981 flow [2024-06-04 14:55:57,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 113 transitions, 932 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-04 14:55:57,059 INFO L231 Difference]: Finished difference. Result has 127 places, 90 transitions, 654 flow [2024-06-04 14:55:57,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=646, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=654, PETRI_PLACES=127, PETRI_TRANSITIONS=90} [2024-06-04 14:55:57,059 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 97 predicate places. [2024-06-04 14:55:57,060 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 90 transitions, 654 flow [2024-06-04 14:55:57,060 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) [2024-06-04 14:55:57,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:57,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:57,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-04 14:55:57,060 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)] === [2024-06-04 14:55:57,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:57,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1734528822, now seen corresponding path program 4 times [2024-06-04 14:55:57,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:57,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444547363] [2024-06-04 14:55:57,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:57,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:57,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:58,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:58,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:58,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444547363] [2024-06-04 14:55:58,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444547363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:58,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:58,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:55:58,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610460132] [2024-06-04 14:55:58,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:58,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:55:58,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:58,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:55:58,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:55:58,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:55:58,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 90 transitions, 654 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) [2024-06-04 14:55:58,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:58,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:55:58,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:58,455 INFO L124 PetriNetUnfolderBase]: 236/455 cut-off events. [2024-06-04 14:55:58,455 INFO L125 PetriNetUnfolderBase]: For 14736/14736 co-relation queries the response was YES. [2024-06-04 14:55:58,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2378 conditions, 455 events. 236/455 cut-off events. For 14736/14736 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1906 event pairs, 53 based on Foata normal form. 2/457 useless extension candidates. Maximal degree in co-relation 2319. Up to 390 conditions per place. [2024-06-04 14:55:58,457 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 84 selfloop transitions, 18 changer transitions 0/104 dead transitions. [2024-06-04 14:55:58,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 104 transitions, 904 flow [2024-06-04 14:55:58,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:55:58,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:55:58,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 108 transitions. [2024-06-04 14:55:58,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34838709677419355 [2024-06-04 14:55:58,458 INFO L175 Difference]: Start difference. First operand has 127 places, 90 transitions, 654 flow. Second operand 10 states and 108 transitions. [2024-06-04 14:55:58,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 104 transitions, 904 flow [2024-06-04 14:55:58,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 104 transitions, 866 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-04 14:55:58,478 INFO L231 Difference]: Finished difference. Result has 124 places, 91 transitions, 674 flow [2024-06-04 14:55:58,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=616, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=674, PETRI_PLACES=124, PETRI_TRANSITIONS=91} [2024-06-04 14:55:58,478 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 94 predicate places. [2024-06-04 14:55:58,478 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 91 transitions, 674 flow [2024-06-04 14:55:58,478 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) [2024-06-04 14:55:58,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:58,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:58,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-04 14:55:58,478 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)] === [2024-06-04 14:55:58,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:58,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1922028062, now seen corresponding path program 5 times [2024-06-04 14:55:58,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:58,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648575793] [2024-06-04 14:55:58,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:58,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:58,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:59,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:59,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:59,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648575793] [2024-06-04 14:55:59,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648575793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:59,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:59,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:55:59,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917778214] [2024-06-04 14:55:59,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:59,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:55:59,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:59,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:55:59,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:55:59,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:55:59,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 91 transitions, 674 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) [2024-06-04 14:55:59,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:59,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:55:59,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:59,751 INFO L124 PetriNetUnfolderBase]: 240/463 cut-off events. [2024-06-04 14:55:59,752 INFO L125 PetriNetUnfolderBase]: For 14238/14238 co-relation queries the response was YES. [2024-06-04 14:55:59,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2423 conditions, 463 events. 240/463 cut-off events. For 14238/14238 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 1969 event pairs, 49 based on Foata normal form. 2/465 useless extension candidates. Maximal degree in co-relation 2365. Up to 416 conditions per place. [2024-06-04 14:55:59,755 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 85 selfloop transitions, 18 changer transitions 0/105 dead transitions. [2024-06-04 14:55:59,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 105 transitions, 930 flow [2024-06-04 14:55:59,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:55:59,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:55:59,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 109 transitions. [2024-06-04 14:55:59,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35161290322580646 [2024-06-04 14:55:59,756 INFO L175 Difference]: Start difference. First operand has 124 places, 91 transitions, 674 flow. Second operand 10 states and 109 transitions. [2024-06-04 14:55:59,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 105 transitions, 930 flow [2024-06-04 14:55:59,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 105 transitions, 882 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-04 14:55:59,777 INFO L231 Difference]: Finished difference. Result has 126 places, 92 transitions, 686 flow [2024-06-04 14:55:59,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=626, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=686, PETRI_PLACES=126, PETRI_TRANSITIONS=92} [2024-06-04 14:55:59,777 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 96 predicate places. [2024-06-04 14:55:59,777 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 92 transitions, 686 flow [2024-06-04 14:55:59,777 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) [2024-06-04 14:55:59,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:59,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:59,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-04 14:55:59,778 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)] === [2024-06-04 14:55:59,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:59,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1372999648, now seen corresponding path program 6 times [2024-06-04 14:55:59,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:59,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838692594] [2024-06-04 14:55:59,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:59,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:59,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:00,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:00,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:00,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838692594] [2024-06-04 14:56:00,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838692594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:00,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:00,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:56:00,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475237561] [2024-06-04 14:56:00,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:00,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:56:00,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:00,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:56:00,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:56:00,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:56:00,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 92 transitions, 686 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) [2024-06-04 14:56:00,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:00,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:56:00,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:01,269 INFO L124 PetriNetUnfolderBase]: 244/471 cut-off events. [2024-06-04 14:56:01,269 INFO L125 PetriNetUnfolderBase]: For 15128/15128 co-relation queries the response was YES. [2024-06-04 14:56:01,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2482 conditions, 471 events. 244/471 cut-off events. For 15128/15128 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2008 event pairs, 47 based on Foata normal form. 2/473 useless extension candidates. Maximal degree in co-relation 2423. Up to 412 conditions per place. [2024-06-04 14:56:01,271 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 84 selfloop transitions, 22 changer transitions 0/108 dead transitions. [2024-06-04 14:56:01,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 108 transitions, 958 flow [2024-06-04 14:56:01,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:56:01,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:56:01,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2024-06-04 14:56:01,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36774193548387096 [2024-06-04 14:56:01,272 INFO L175 Difference]: Start difference. First operand has 126 places, 92 transitions, 686 flow. Second operand 10 states and 114 transitions. [2024-06-04 14:56:01,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 108 transitions, 958 flow [2024-06-04 14:56:01,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 108 transitions, 908 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-04 14:56:01,292 INFO L231 Difference]: Finished difference. Result has 128 places, 93 transitions, 706 flow [2024-06-04 14:56:01,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=636, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=706, PETRI_PLACES=128, PETRI_TRANSITIONS=93} [2024-06-04 14:56:01,292 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 98 predicate places. [2024-06-04 14:56:01,292 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 93 transitions, 706 flow [2024-06-04 14:56:01,292 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) [2024-06-04 14:56:01,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:01,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:01,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-04 14:56:01,293 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)] === [2024-06-04 14:56:01,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:01,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1372815074, now seen corresponding path program 21 times [2024-06-04 14:56:01,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:01,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091078275] [2024-06-04 14:56:01,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:01,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:01,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:02,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:02,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:02,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091078275] [2024-06-04 14:56:02,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091078275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:02,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:02,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:56:02,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549818889] [2024-06-04 14:56:02,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:02,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:56:02,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:02,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:56:02,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:56:02,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:56:02,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 93 transitions, 706 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) [2024-06-04 14:56:02,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:02,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:56:02,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:02,547 INFO L124 PetriNetUnfolderBase]: 285/558 cut-off events. [2024-06-04 14:56:02,547 INFO L125 PetriNetUnfolderBase]: For 27655/27655 co-relation queries the response was YES. [2024-06-04 14:56:02,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3137 conditions, 558 events. 285/558 cut-off events. For 27655/27655 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2546 event pairs, 58 based on Foata normal form. 8/566 useless extension candidates. Maximal degree in co-relation 3077. Up to 362 conditions per place. [2024-06-04 14:56:02,550 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 79 selfloop transitions, 29 changer transitions 8/118 dead transitions. [2024-06-04 14:56:02,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 118 transitions, 1108 flow [2024-06-04 14:56:02,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:56:02,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:56:02,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 132 transitions. [2024-06-04 14:56:02,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-04 14:56:02,551 INFO L175 Difference]: Start difference. First operand has 128 places, 93 transitions, 706 flow. Second operand 11 states and 132 transitions. [2024-06-04 14:56:02,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 118 transitions, 1108 flow [2024-06-04 14:56:02,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 118 transitions, 1048 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-04 14:56:02,581 INFO L231 Difference]: Finished difference. Result has 131 places, 90 transitions, 685 flow [2024-06-04 14:56:02,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=646, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=685, PETRI_PLACES=131, PETRI_TRANSITIONS=90} [2024-06-04 14:56:02,582 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 101 predicate places. [2024-06-04 14:56:02,582 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 90 transitions, 685 flow [2024-06-04 14:56:02,582 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) [2024-06-04 14:56:02,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:02,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:02,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-04 14:56:02,582 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)] === [2024-06-04 14:56:02,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:02,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1898194810, now seen corresponding path program 22 times [2024-06-04 14:56:02,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:02,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091707064] [2024-06-04 14:56:02,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:02,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:02,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:03,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:03,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:03,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091707064] [2024-06-04 14:56:03,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091707064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:03,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:03,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:56:03,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751258038] [2024-06-04 14:56:03,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:03,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:56:03,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:03,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:56:03,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:56:03,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:56:03,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 90 transitions, 685 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) [2024-06-04 14:56:03,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:03,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:56:03,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:03,979 INFO L124 PetriNetUnfolderBase]: 282/553 cut-off events. [2024-06-04 14:56:03,979 INFO L125 PetriNetUnfolderBase]: For 30486/30486 co-relation queries the response was YES. [2024-06-04 14:56:03,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3126 conditions, 553 events. 282/553 cut-off events. For 30486/30486 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2528 event pairs, 72 based on Foata normal form. 10/563 useless extension candidates. Maximal degree in co-relation 3065. Up to 450 conditions per place. [2024-06-04 14:56:03,982 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 79 selfloop transitions, 19 changer transitions 11/111 dead transitions. [2024-06-04 14:56:03,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 111 transitions, 975 flow [2024-06-04 14:56:03,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:56:03,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:56:03,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2024-06-04 14:56:03,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3724340175953079 [2024-06-04 14:56:03,982 INFO L175 Difference]: Start difference. First operand has 131 places, 90 transitions, 685 flow. Second operand 11 states and 127 transitions. [2024-06-04 14:56:03,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 111 transitions, 975 flow [2024-06-04 14:56:04,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 111 transitions, 915 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-04 14:56:04,007 INFO L231 Difference]: Finished difference. Result has 128 places, 87 transitions, 640 flow [2024-06-04 14:56:04,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=625, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=640, PETRI_PLACES=128, PETRI_TRANSITIONS=87} [2024-06-04 14:56:04,008 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 98 predicate places. [2024-06-04 14:56:04,008 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 87 transitions, 640 flow [2024-06-04 14:56:04,008 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) [2024-06-04 14:56:04,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:04,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:04,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-04 14:56:04,009 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)] === [2024-06-04 14:56:04,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:04,009 INFO L85 PathProgramCache]: Analyzing trace with hash 2029748022, now seen corresponding path program 7 times [2024-06-04 14:56:04,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:04,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701488797] [2024-06-04 14:56:04,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:04,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:04,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:04,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:04,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:04,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701488797] [2024-06-04 14:56:04,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701488797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:04,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:04,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:56:04,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026458818] [2024-06-04 14:56:04,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:04,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:56:04,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:04,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:56:04,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:56:05,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:56:05,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 87 transitions, 640 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) [2024-06-04 14:56:05,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:05,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:56:05,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:05,451 INFO L124 PetriNetUnfolderBase]: 260/511 cut-off events. [2024-06-04 14:56:05,451 INFO L125 PetriNetUnfolderBase]: For 22032/22032 co-relation queries the response was YES. [2024-06-04 14:56:05,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2924 conditions, 511 events. 260/511 cut-off events. For 22032/22032 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2262 event pairs, 70 based on Foata normal form. 2/513 useless extension candidates. Maximal degree in co-relation 2865. Up to 468 conditions per place. [2024-06-04 14:56:05,453 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 85 selfloop transitions, 14 changer transitions 0/101 dead transitions. [2024-06-04 14:56:05,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 101 transitions, 888 flow [2024-06-04 14:56:05,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:56:05,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:56:05,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 105 transitions. [2024-06-04 14:56:05,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3387096774193548 [2024-06-04 14:56:05,454 INFO L175 Difference]: Start difference. First operand has 128 places, 87 transitions, 640 flow. Second operand 10 states and 105 transitions. [2024-06-04 14:56:05,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 101 transitions, 888 flow [2024-06-04 14:56:05,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 101 transitions, 846 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-04 14:56:05,478 INFO L231 Difference]: Finished difference. Result has 125 places, 88 transitions, 654 flow [2024-06-04 14:56:05,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=598, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=654, PETRI_PLACES=125, PETRI_TRANSITIONS=88} [2024-06-04 14:56:05,478 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 95 predicate places. [2024-06-04 14:56:05,478 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 88 transitions, 654 flow [2024-06-04 14:56:05,478 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) [2024-06-04 14:56:05,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:05,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:05,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-04 14:56:05,479 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)] === [2024-06-04 14:56:05,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:05,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1891701116, now seen corresponding path program 8 times [2024-06-04 14:56:05,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:05,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298774749] [2024-06-04 14:56:05,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:05,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:05,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:06,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:06,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:06,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298774749] [2024-06-04 14:56:06,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298774749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:06,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:06,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:56:06,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517696788] [2024-06-04 14:56:06,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:06,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:56:06,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:06,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:56:06,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:56:06,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:56:06,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 88 transitions, 654 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) [2024-06-04 14:56:06,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:06,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:56:06,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:06,905 INFO L124 PetriNetUnfolderBase]: 259/516 cut-off events. [2024-06-04 14:56:06,905 INFO L125 PetriNetUnfolderBase]: For 24724/24724 co-relation queries the response was YES. [2024-06-04 14:56:06,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2569 conditions, 516 events. 259/516 cut-off events. For 24724/24724 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2348 event pairs, 59 based on Foata normal form. 18/534 useless extension candidates. Maximal degree in co-relation 2511. Up to 383 conditions per place. [2024-06-04 14:56:06,907 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 77 selfloop transitions, 17 changer transitions 16/112 dead transitions. [2024-06-04 14:56:06,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 112 transitions, 974 flow [2024-06-04 14:56:06,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 14:56:06,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 14:56:06,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 142 transitions. [2024-06-04 14:56:06,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3523573200992556 [2024-06-04 14:56:06,908 INFO L175 Difference]: Start difference. First operand has 125 places, 88 transitions, 654 flow. Second operand 13 states and 142 transitions. [2024-06-04 14:56:06,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 112 transitions, 974 flow [2024-06-04 14:56:06,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 112 transitions, 928 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-04 14:56:06,927 INFO L231 Difference]: Finished difference. Result has 130 places, 83 transitions, 606 flow [2024-06-04 14:56:06,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=608, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=606, PETRI_PLACES=130, PETRI_TRANSITIONS=83} [2024-06-04 14:56:06,928 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 100 predicate places. [2024-06-04 14:56:06,928 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 83 transitions, 606 flow [2024-06-04 14:56:06,928 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) [2024-06-04 14:56:06,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:06,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:06,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-04 14:56:06,928 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)] === [2024-06-04 14:56:06,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:06,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1928514812, now seen corresponding path program 9 times [2024-06-04 14:56:06,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:06,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210884174] [2024-06-04 14:56:06,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:06,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:06,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:07,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:07,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:07,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210884174] [2024-06-04 14:56:07,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210884174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:07,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:07,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:56:07,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554295659] [2024-06-04 14:56:07,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:07,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:56:07,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:07,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:56:07,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:56:07,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:56:07,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 83 transitions, 606 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) [2024-06-04 14:56:07,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:07,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:56:07,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:08,241 INFO L124 PetriNetUnfolderBase]: 243/492 cut-off events. [2024-06-04 14:56:08,241 INFO L125 PetriNetUnfolderBase]: For 25792/25792 co-relation queries the response was YES. [2024-06-04 14:56:08,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2440 conditions, 492 events. 243/492 cut-off events. For 25792/25792 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2234 event pairs, 57 based on Foata normal form. 18/510 useless extension candidates. Maximal degree in co-relation 2381. Up to 371 conditions per place. [2024-06-04 14:56:08,243 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 72 selfloop transitions, 14 changer transitions 16/104 dead transitions. [2024-06-04 14:56:08,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 104 transitions, 902 flow [2024-06-04 14:56:08,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:56:08,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:56:08,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 124 transitions. [2024-06-04 14:56:08,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-04 14:56:08,244 INFO L175 Difference]: Start difference. First operand has 130 places, 83 transitions, 606 flow. Second operand 11 states and 124 transitions. [2024-06-04 14:56:08,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 104 transitions, 902 flow [2024-06-04 14:56:08,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 104 transitions, 864 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-04 14:56:08,263 INFO L231 Difference]: Finished difference. Result has 124 places, 78 transitions, 564 flow [2024-06-04 14:56:08,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=568, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=564, PETRI_PLACES=124, PETRI_TRANSITIONS=78} [2024-06-04 14:56:08,263 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 94 predicate places. [2024-06-04 14:56:08,264 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 78 transitions, 564 flow [2024-06-04 14:56:08,264 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) [2024-06-04 14:56:08,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:08,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:08,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-04 14:56:08,264 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)] === [2024-06-04 14:56:08,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:08,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1379494768, now seen corresponding path program 10 times [2024-06-04 14:56:08,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:08,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814514991] [2024-06-04 14:56:08,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:08,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:08,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:09,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:09,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:09,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814514991] [2024-06-04 14:56:09,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814514991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:09,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:09,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:56:09,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759585867] [2024-06-04 14:56:09,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:09,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:56:09,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:09,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:56:09,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:56:09,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:56:09,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 78 transitions, 564 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) [2024-06-04 14:56:09,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:09,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:56:09,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:09,793 INFO L124 PetriNetUnfolderBase]: 205/414 cut-off events. [2024-06-04 14:56:09,793 INFO L125 PetriNetUnfolderBase]: For 14179/14179 co-relation queries the response was YES. [2024-06-04 14:56:09,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2163 conditions, 414 events. 205/414 cut-off events. For 14179/14179 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1754 event pairs, 47 based on Foata normal form. 2/416 useless extension candidates. Maximal degree in co-relation 2105. Up to 340 conditions per place. [2024-06-04 14:56:09,795 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 71 selfloop transitions, 23 changer transitions 0/96 dead transitions. [2024-06-04 14:56:09,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 96 transitions, 818 flow [2024-06-04 14:56:09,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 14:56:09,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 14:56:09,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 128 transitions. [2024-06-04 14:56:09,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34408602150537637 [2024-06-04 14:56:09,796 INFO L175 Difference]: Start difference. First operand has 124 places, 78 transitions, 564 flow. Second operand 12 states and 128 transitions. [2024-06-04 14:56:09,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 96 transitions, 818 flow [2024-06-04 14:56:09,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 96 transitions, 786 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-04 14:56:09,814 INFO L231 Difference]: Finished difference. Result has 122 places, 79 transitions, 608 flow [2024-06-04 14:56:09,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=608, PETRI_PLACES=122, PETRI_TRANSITIONS=79} [2024-06-04 14:56:09,814 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 92 predicate places. [2024-06-04 14:56:09,815 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 79 transitions, 608 flow [2024-06-04 14:56:09,815 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) [2024-06-04 14:56:09,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:09,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:09,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-04 14:56:09,815 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)] === [2024-06-04 14:56:09,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:09,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1928694736, now seen corresponding path program 23 times [2024-06-04 14:56:09,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:09,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537832594] [2024-06-04 14:56:09,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:09,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:09,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:10,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:10,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:10,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537832594] [2024-06-04 14:56:10,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537832594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:10,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:10,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:56:10,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951227423] [2024-06-04 14:56:10,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:10,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:56:10,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:10,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:56:10,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:56:10,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:56:10,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 79 transitions, 608 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) [2024-06-04 14:56:10,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:10,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:56:10,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:11,257 INFO L124 PetriNetUnfolderBase]: 221/450 cut-off events. [2024-06-04 14:56:11,258 INFO L125 PetriNetUnfolderBase]: For 18670/18670 co-relation queries the response was YES. [2024-06-04 14:56:11,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2286 conditions, 450 events. 221/450 cut-off events. For 18670/18670 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1993 event pairs, 51 based on Foata normal form. 10/460 useless extension candidates. Maximal degree in co-relation 2229. Up to 356 conditions per place. [2024-06-04 14:56:11,259 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 69 selfloop transitions, 17 changer transitions 11/99 dead transitions. [2024-06-04 14:56:11,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 99 transitions, 870 flow [2024-06-04 14:56:11,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:56:11,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:56:11,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-04 14:56:11,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36070381231671556 [2024-06-04 14:56:11,260 INFO L175 Difference]: Start difference. First operand has 122 places, 79 transitions, 608 flow. Second operand 11 states and 123 transitions. [2024-06-04 14:56:11,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 99 transitions, 870 flow [2024-06-04 14:56:11,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 99 transitions, 804 flow, removed 11 selfloop flow, removed 10 redundant places. [2024-06-04 14:56:11,277 INFO L231 Difference]: Finished difference. Result has 123 places, 76 transitions, 559 flow [2024-06-04 14:56:11,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=559, PETRI_PLACES=123, PETRI_TRANSITIONS=76} [2024-06-04 14:56:11,278 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 93 predicate places. [2024-06-04 14:56:11,278 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 76 transitions, 559 flow [2024-06-04 14:56:11,278 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) [2024-06-04 14:56:11,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:11,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:11,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-04 14:56:11,279 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)] === [2024-06-04 14:56:11,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:11,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1922265646, now seen corresponding path program 24 times [2024-06-04 14:56:11,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:11,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151387617] [2024-06-04 14:56:11,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:11,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:11,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:12,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:12,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:12,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151387617] [2024-06-04 14:56:12,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151387617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:12,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:12,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:56:12,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492343846] [2024-06-04 14:56:12,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:12,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:56:12,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:12,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:56:12,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:56:12,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:56:12,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 76 transitions, 559 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) [2024-06-04 14:56:12,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:12,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:56:12,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:12,652 INFO L124 PetriNetUnfolderBase]: 206/425 cut-off events. [2024-06-04 14:56:12,652 INFO L125 PetriNetUnfolderBase]: For 18022/18022 co-relation queries the response was YES. [2024-06-04 14:56:12,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2083 conditions, 425 events. 206/425 cut-off events. For 18022/18022 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1842 event pairs, 52 based on Foata normal form. 10/435 useless extension candidates. Maximal degree in co-relation 2025. Up to 340 conditions per place. [2024-06-04 14:56:12,654 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 69 selfloop transitions, 13 changer transitions 11/95 dead transitions. [2024-06-04 14:56:12,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 95 transitions, 809 flow [2024-06-04 14:56:12,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:56:12,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:56:12,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 121 transitions. [2024-06-04 14:56:12,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-04 14:56:12,655 INFO L175 Difference]: Start difference. First operand has 123 places, 76 transitions, 559 flow. Second operand 11 states and 121 transitions. [2024-06-04 14:56:12,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 95 transitions, 809 flow [2024-06-04 14:56:12,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 95 transitions, 771 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-04 14:56:12,673 INFO L231 Difference]: Finished difference. Result has 121 places, 73 transitions, 526 flow [2024-06-04 14:56:12,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=526, PETRI_PLACES=121, PETRI_TRANSITIONS=73} [2024-06-04 14:56:12,673 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 91 predicate places. [2024-06-04 14:56:12,674 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 73 transitions, 526 flow [2024-06-04 14:56:12,674 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) [2024-06-04 14:56:12,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:12,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:12,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-04 14:56:12,674 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)] === [2024-06-04 14:56:12,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:12,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1922019692, now seen corresponding path program 11 times [2024-06-04 14:56:12,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:12,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862157484] [2024-06-04 14:56:12,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:12,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:12,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:13,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:13,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:13,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862157484] [2024-06-04 14:56:13,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862157484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:13,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:13,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:56:13,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023453451] [2024-06-04 14:56:13,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:13,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:56:13,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:13,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:56:13,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:56:13,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:56:13,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 73 transitions, 526 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) [2024-06-04 14:56:13,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:13,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:56:13,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:13,919 INFO L124 PetriNetUnfolderBase]: 177/370 cut-off events. [2024-06-04 14:56:13,919 INFO L125 PetriNetUnfolderBase]: For 10726/10726 co-relation queries the response was YES. [2024-06-04 14:56:13,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1770 conditions, 370 events. 177/370 cut-off events. For 10726/10726 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1537 event pairs, 47 based on Foata normal form. 2/372 useless extension candidates. Maximal degree in co-relation 1713. Up to 315 conditions per place. [2024-06-04 14:56:13,920 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 69 selfloop transitions, 15 changer transitions 0/86 dead transitions. [2024-06-04 14:56:13,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 86 transitions, 724 flow [2024-06-04 14:56:13,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:56:13,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:56:13,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 108 transitions. [2024-06-04 14:56:13,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34838709677419355 [2024-06-04 14:56:13,921 INFO L175 Difference]: Start difference. First operand has 121 places, 73 transitions, 526 flow. Second operand 10 states and 108 transitions. [2024-06-04 14:56:13,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 86 transitions, 724 flow [2024-06-04 14:56:13,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 86 transitions, 692 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-04 14:56:13,934 INFO L231 Difference]: Finished difference. Result has 118 places, 73 transitions, 528 flow [2024-06-04 14:56:13,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=528, PETRI_PLACES=118, PETRI_TRANSITIONS=73} [2024-06-04 14:56:13,935 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 88 predicate places. [2024-06-04 14:56:13,935 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 73 transitions, 528 flow [2024-06-04 14:56:13,935 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) [2024-06-04 14:56:13,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:13,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:13,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-04 14:56:13,936 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)] === [2024-06-04 14:56:13,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:13,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1204997808, now seen corresponding path program 25 times [2024-06-04 14:56:13,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:13,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539201475] [2024-06-04 14:56:13,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:13,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:13,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:14,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:14,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:14,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539201475] [2024-06-04 14:56:14,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539201475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:14,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:14,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:56:14,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661616169] [2024-06-04 14:56:14,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:14,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:56:14,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:14,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:56:14,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:56:14,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:56:14,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 73 transitions, 528 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) [2024-06-04 14:56:14,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:14,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:56:14,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:15,197 INFO L124 PetriNetUnfolderBase]: 167/352 cut-off events. [2024-06-04 14:56:15,198 INFO L125 PetriNetUnfolderBase]: For 8880/8880 co-relation queries the response was YES. [2024-06-04 14:56:15,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1433 conditions, 352 events. 167/352 cut-off events. For 8880/8880 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1460 event pairs, 27 based on Foata normal form. 8/360 useless extension candidates. Maximal degree in co-relation 1377. Up to 250 conditions per place. [2024-06-04 14:56:15,199 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 57 selfloop transitions, 19 changer transitions 12/90 dead transitions. [2024-06-04 14:56:15,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 90 transitions, 746 flow [2024-06-04 14:56:15,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:56:15,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:56:15,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 120 transitions. [2024-06-04 14:56:15,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3519061583577713 [2024-06-04 14:56:15,200 INFO L175 Difference]: Start difference. First operand has 118 places, 73 transitions, 528 flow. Second operand 11 states and 120 transitions. [2024-06-04 14:56:15,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 90 transitions, 746 flow [2024-06-04 14:56:15,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 90 transitions, 670 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-04 14:56:15,210 INFO L231 Difference]: Finished difference. Result has 120 places, 68 transitions, 454 flow [2024-06-04 14:56:15,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=454, PETRI_PLACES=120, PETRI_TRANSITIONS=68} [2024-06-04 14:56:15,210 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 90 predicate places. [2024-06-04 14:56:15,210 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 68 transitions, 454 flow [2024-06-04 14:56:15,210 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) [2024-06-04 14:56:15,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:15,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:15,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-04 14:56:15,211 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)] === [2024-06-04 14:56:15,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:15,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1862506733, now seen corresponding path program 1 times [2024-06-04 14:56:15,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:15,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935523482] [2024-06-04 14:56:15,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:15,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:15,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:16,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:16,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:16,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935523482] [2024-06-04 14:56:16,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935523482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:16,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:16,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:56:16,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618538509] [2024-06-04 14:56:16,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:16,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:56:16,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:16,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:56:16,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:56:16,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:56:16,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 68 transitions, 454 flow. Second operand has 11 states, 11 states have (on average 7.545454545454546) internal successors, (83), 11 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:16,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:16,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:56:16,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:16,655 INFO L124 PetriNetUnfolderBase]: 155/328 cut-off events. [2024-06-04 14:56:16,655 INFO L125 PetriNetUnfolderBase]: For 7994/7994 co-relation queries the response was YES. [2024-06-04 14:56:16,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1270 conditions, 328 events. 155/328 cut-off events. For 7994/7994 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1343 event pairs, 29 based on Foata normal form. 6/334 useless extension candidates. Maximal degree in co-relation 1213. Up to 202 conditions per place. [2024-06-04 14:56:16,656 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 53 selfloop transitions, 15 changer transitions 15/85 dead transitions. [2024-06-04 14:56:16,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 85 transitions, 666 flow [2024-06-04 14:56:16,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:56:16,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:56:16,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-04 14:56:16,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-04 14:56:16,657 INFO L175 Difference]: Start difference. First operand has 120 places, 68 transitions, 454 flow. Second operand 10 states and 110 transitions. [2024-06-04 14:56:16,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 85 transitions, 666 flow [2024-06-04 14:56:16,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 85 transitions, 596 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-04 14:56:16,665 INFO L231 Difference]: Finished difference. Result has 110 places, 62 transitions, 390 flow [2024-06-04 14:56:16,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=390, PETRI_PLACES=110, PETRI_TRANSITIONS=62} [2024-06-04 14:56:16,666 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 80 predicate places. [2024-06-04 14:56:16,666 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 62 transitions, 390 flow [2024-06-04 14:56:16,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.545454545454546) internal successors, (83), 11 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:16,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:16,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:16,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-04 14:56:16,666 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)] === [2024-06-04 14:56:16,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:16,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1373091429, now seen corresponding path program 2 times [2024-06-04 14:56:16,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:16,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53806704] [2024-06-04 14:56:16,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:16,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:16,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:17,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:17,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:17,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53806704] [2024-06-04 14:56:17,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53806704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:17,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:17,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-04 14:56:17,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048037307] [2024-06-04 14:56:17,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:17,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-04 14:56:17,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:17,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-04 14:56:17,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-04 14:56:17,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:56:17,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 62 transitions, 390 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) [2024-06-04 14:56:17,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:17,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:56:17,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:18,323 INFO L124 PetriNetUnfolderBase]: 143/304 cut-off events. [2024-06-04 14:56:18,323 INFO L125 PetriNetUnfolderBase]: For 7132/7132 co-relation queries the response was YES. [2024-06-04 14:56:18,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1126 conditions, 304 events. 143/304 cut-off events. For 7132/7132 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1205 event pairs, 31 based on Foata normal form. 6/310 useless extension candidates. Maximal degree in co-relation 1073. Up to 192 conditions per place. [2024-06-04 14:56:18,324 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 53 selfloop transitions, 14 changer transitions 11/80 dead transitions. [2024-06-04 14:56:18,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 80 transitions, 592 flow [2024-06-04 14:56:18,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:56:18,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:56:18,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 117 transitions. [2024-06-04 14:56:18,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34310850439882695 [2024-06-04 14:56:18,325 INFO L175 Difference]: Start difference. First operand has 110 places, 62 transitions, 390 flow. Second operand 11 states and 117 transitions. [2024-06-04 14:56:18,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 80 transitions, 592 flow [2024-06-04 14:56:18,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 80 transitions, 554 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-04 14:56:18,332 INFO L231 Difference]: Finished difference. Result has 104 places, 59 transitions, 367 flow [2024-06-04 14:56:18,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=93, 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=11, PETRI_FLOW=367, PETRI_PLACES=104, PETRI_TRANSITIONS=59} [2024-06-04 14:56:18,332 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 74 predicate places. [2024-06-04 14:56:18,332 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 59 transitions, 367 flow [2024-06-04 14:56:18,332 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) [2024-06-04 14:56:18,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:18,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:18,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-04 14:56:18,332 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)] === [2024-06-04 14:56:18,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:18,333 INFO L85 PathProgramCache]: Analyzing trace with hash 906451137, now seen corresponding path program 3 times [2024-06-04 14:56:18,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:18,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802736511] [2024-06-04 14:56:18,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:18,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:18,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:19,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:19,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:19,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802736511] [2024-06-04 14:56:19,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802736511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:19,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:19,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-04 14:56:19,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747952905] [2024-06-04 14:56:19,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:19,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-04 14:56:19,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:19,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-04 14:56:19,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-04 14:56:19,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:56:19,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 59 transitions, 367 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) [2024-06-04 14:56:19,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:19,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:56:19,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:19,937 INFO L124 PetriNetUnfolderBase]: 133/286 cut-off events. [2024-06-04 14:56:19,937 INFO L125 PetriNetUnfolderBase]: For 5944/5944 co-relation queries the response was YES. [2024-06-04 14:56:19,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1047 conditions, 286 events. 133/286 cut-off events. For 5944/5944 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1097 event pairs, 29 based on Foata normal form. 6/292 useless extension candidates. Maximal degree in co-relation 997. Up to 174 conditions per place. [2024-06-04 14:56:19,939 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 44 selfloop transitions, 9 changer transitions 22/77 dead transitions. [2024-06-04 14:56:19,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 77 transitions, 561 flow [2024-06-04 14:56:19,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:56:19,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:56:19,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 116 transitions. [2024-06-04 14:56:19,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34017595307917886 [2024-06-04 14:56:19,940 INFO L175 Difference]: Start difference. First operand has 104 places, 59 transitions, 367 flow. Second operand 11 states and 116 transitions. [2024-06-04 14:56:19,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 77 transitions, 561 flow [2024-06-04 14:56:19,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 77 transitions, 527 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-04 14:56:19,948 INFO L231 Difference]: Finished difference. Result has 100 places, 52 transitions, 319 flow [2024-06-04 14:56:19,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=319, PETRI_PLACES=100, PETRI_TRANSITIONS=52} [2024-06-04 14:56:19,948 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 70 predicate places. [2024-06-04 14:56:19,949 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 52 transitions, 319 flow [2024-06-04 14:56:19,949 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) [2024-06-04 14:56:19,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:19,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:19,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-04 14:56:19,949 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)] === [2024-06-04 14:56:19,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:19,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1292083973, now seen corresponding path program 4 times [2024-06-04 14:56:19,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:19,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947318797] [2024-06-04 14:56:19,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:19,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:19,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:20,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:20,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:20,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947318797] [2024-06-04 14:56:20,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947318797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:20,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:20,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-04 14:56:20,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249476411] [2024-06-04 14:56:20,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:20,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-04 14:56:20,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:20,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-04 14:56:20,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-04 14:56:21,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:56:21,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 52 transitions, 319 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) [2024-06-04 14:56:21,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:21,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:56:21,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:21,403 INFO L124 PetriNetUnfolderBase]: 115/247 cut-off events. [2024-06-04 14:56:21,403 INFO L125 PetriNetUnfolderBase]: For 5162/5162 co-relation queries the response was YES. [2024-06-04 14:56:21,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 908 conditions, 247 events. 115/247 cut-off events. For 5162/5162 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 904 event pairs, 25 based on Foata normal form. 6/253 useless extension candidates. Maximal degree in co-relation 860. Up to 174 conditions per place. [2024-06-04 14:56:21,404 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 39 selfloop transitions, 12 changer transitions 13/66 dead transitions. [2024-06-04 14:56:21,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 66 transitions, 481 flow [2024-06-04 14:56:21,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:56:21,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:56:21,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 112 transitions. [2024-06-04 14:56:21,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3284457478005865 [2024-06-04 14:56:21,407 INFO L175 Difference]: Start difference. First operand has 100 places, 52 transitions, 319 flow. Second operand 11 states and 112 transitions. [2024-06-04 14:56:21,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 66 transitions, 481 flow [2024-06-04 14:56:21,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 66 transitions, 449 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-04 14:56:21,412 INFO L231 Difference]: Finished difference. Result has 88 places, 47 transitions, 282 flow [2024-06-04 14:56:21,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=282, PETRI_PLACES=88, PETRI_TRANSITIONS=47} [2024-06-04 14:56:21,413 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 58 predicate places. [2024-06-04 14:56:21,413 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 47 transitions, 282 flow [2024-06-04 14:56:21,413 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) [2024-06-04 14:56:21,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:21,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:21,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-04 14:56:21,413 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)] === [2024-06-04 14:56:21,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:21,413 INFO L85 PathProgramCache]: Analyzing trace with hash -212093393, now seen corresponding path program 5 times [2024-06-04 14:56:21,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:21,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978158742] [2024-06-04 14:56:21,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:21,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:21,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:22,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:22,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:22,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978158742] [2024-06-04 14:56:22,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978158742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:22,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:22,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-04 14:56:22,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209828160] [2024-06-04 14:56:22,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:22,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-04 14:56:22,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:22,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-04 14:56:22,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-04 14:56:22,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:56:22,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 47 transitions, 282 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) [2024-06-04 14:56:22,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:22,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:56:22,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:23,055 INFO L124 PetriNetUnfolderBase]: 102/224 cut-off events. [2024-06-04 14:56:23,056 INFO L125 PetriNetUnfolderBase]: For 3540/3540 co-relation queries the response was YES. [2024-06-04 14:56:23,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 802 conditions, 224 events. 102/224 cut-off events. For 3540/3540 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 791 event pairs, 23 based on Foata normal form. 6/230 useless extension candidates. Maximal degree in co-relation 760. Up to 154 conditions per place. [2024-06-04 14:56:23,057 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 35 selfloop transitions, 8 changer transitions 16/61 dead transitions. [2024-06-04 14:56:23,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 61 transitions, 432 flow [2024-06-04 14:56:23,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:56:23,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:56:23,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 111 transitions. [2024-06-04 14:56:23,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3255131964809384 [2024-06-04 14:56:23,057 INFO L175 Difference]: Start difference. First operand has 88 places, 47 transitions, 282 flow. Second operand 11 states and 111 transitions. [2024-06-04 14:56:23,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 61 transitions, 432 flow [2024-06-04 14:56:23,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 61 transitions, 386 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-04 14:56:23,061 INFO L231 Difference]: Finished difference. Result has 82 places, 41 transitions, 215 flow [2024-06-04 14:56:23,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=215, PETRI_PLACES=82, PETRI_TRANSITIONS=41} [2024-06-04 14:56:23,061 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 52 predicate places. [2024-06-04 14:56:23,061 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 41 transitions, 215 flow [2024-06-04 14:56:23,062 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) [2024-06-04 14:56:23,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:23,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:23,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-04 14:56:23,062 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)] === [2024-06-04 14:56:23,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:23,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1499435649, now seen corresponding path program 6 times [2024-06-04 14:56:23,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:23,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653202859] [2024-06-04 14:56:23,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:23,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:23,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:24,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:24,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:24,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653202859] [2024-06-04 14:56:24,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653202859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:24,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:24,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-04 14:56:24,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749788807] [2024-06-04 14:56:24,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:24,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-04 14:56:24,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:24,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-04 14:56:24,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-04 14:56:24,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:56:24,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 41 transitions, 215 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) [2024-06-04 14:56:24,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:24,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:56:24,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:24,582 INFO L124 PetriNetUnfolderBase]: 87/195 cut-off events. [2024-06-04 14:56:24,583 INFO L125 PetriNetUnfolderBase]: For 2906/2906 co-relation queries the response was YES. [2024-06-04 14:56:24,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 673 conditions, 195 events. 87/195 cut-off events. For 2906/2906 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 654 event pairs, 21 based on Foata normal form. 6/201 useless extension candidates. Maximal degree in co-relation 634. Up to 133 conditions per place. [2024-06-04 14:56:24,583 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 33 selfloop transitions, 9 changer transitions 11/55 dead transitions. [2024-06-04 14:56:24,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 55 transitions, 355 flow [2024-06-04 14:56:24,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:56:24,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:56:24,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 110 transitions. [2024-06-04 14:56:24,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3225806451612903 [2024-06-04 14:56:24,584 INFO L175 Difference]: Start difference. First operand has 82 places, 41 transitions, 215 flow. Second operand 11 states and 110 transitions. [2024-06-04 14:56:24,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 55 transitions, 355 flow [2024-06-04 14:56:24,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 55 transitions, 327 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-04 14:56:24,586 INFO L231 Difference]: Finished difference. Result has 74 places, 38 transitions, 194 flow [2024-06-04 14:56:24,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=194, PETRI_PLACES=74, PETRI_TRANSITIONS=38} [2024-06-04 14:56:24,587 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 44 predicate places. [2024-06-04 14:56:24,587 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 38 transitions, 194 flow [2024-06-04 14:56:24,587 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) [2024-06-04 14:56:24,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:24,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:24,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-04 14:56:24,587 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)] === [2024-06-04 14:56:24,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:24,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1285719127, now seen corresponding path program 7 times [2024-06-04 14:56:24,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:24,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012559474] [2024-06-04 14:56:24,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:24,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:24,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:25,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:25,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:25,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012559474] [2024-06-04 14:56:25,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012559474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:25,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:25,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:56:25,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599425250] [2024-06-04 14:56:25,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:25,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:56:25,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:25,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:56:25,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:56:25,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:56:25,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 38 transitions, 194 flow. Second operand has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:25,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:25,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:56:25,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:26,175 INFO L124 PetriNetUnfolderBase]: 77/177 cut-off events. [2024-06-04 14:56:26,175 INFO L125 PetriNetUnfolderBase]: For 2164/2164 co-relation queries the response was YES. [2024-06-04 14:56:26,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 599 conditions, 177 events. 77/177 cut-off events. For 2164/2164 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 561 event pairs, 27 based on Foata normal form. 6/183 useless extension candidates. Maximal degree in co-relation 564. Up to 102 conditions per place. [2024-06-04 14:56:26,175 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 28 selfloop transitions, 9 changer transitions 11/50 dead transitions. [2024-06-04 14:56:26,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 50 transitions, 320 flow [2024-06-04 14:56:26,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:56:26,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:56:26,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 104 transitions. [2024-06-04 14:56:26,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33548387096774196 [2024-06-04 14:56:26,176 INFO L175 Difference]: Start difference. First operand has 74 places, 38 transitions, 194 flow. Second operand 10 states and 104 transitions. [2024-06-04 14:56:26,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 50 transitions, 320 flow [2024-06-04 14:56:26,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 50 transitions, 296 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-04 14:56:26,178 INFO L231 Difference]: Finished difference. Result has 69 places, 34 transitions, 174 flow [2024-06-04 14:56:26,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=174, PETRI_PLACES=69, PETRI_TRANSITIONS=34} [2024-06-04 14:56:26,178 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 39 predicate places. [2024-06-04 14:56:26,178 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 34 transitions, 174 flow [2024-06-04 14:56:26,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:26,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:26,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:26,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-04 14:56:26,179 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)] === [2024-06-04 14:56:26,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:26,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1487067847, now seen corresponding path program 8 times [2024-06-04 14:56:26,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:26,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759322159] [2024-06-04 14:56:26,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:26,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:26,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:27,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:27,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:27,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759322159] [2024-06-04 14:56:27,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759322159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:27,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:27,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-04 14:56:27,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738320873] [2024-06-04 14:56:27,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:27,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-04 14:56:27,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:27,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-04 14:56:27,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-04 14:56:27,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:56:27,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 34 transitions, 174 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) [2024-06-04 14:56:27,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:27,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:56:27,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:27,891 INFO L124 PetriNetUnfolderBase]: 68/158 cut-off events. [2024-06-04 14:56:27,891 INFO L125 PetriNetUnfolderBase]: For 1742/1742 co-relation queries the response was YES. [2024-06-04 14:56:27,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 533 conditions, 158 events. 68/158 cut-off events. For 1742/1742 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 470 event pairs, 19 based on Foata normal form. 6/164 useless extension candidates. Maximal degree in co-relation 500. Up to 84 conditions per place. [2024-06-04 14:56:27,892 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 23 selfloop transitions, 6 changer transitions 17/48 dead transitions. [2024-06-04 14:56:27,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 48 transitions, 298 flow [2024-06-04 14:56:27,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:56:27,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:56:27,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 110 transitions. [2024-06-04 14:56:27,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3225806451612903 [2024-06-04 14:56:27,894 INFO L175 Difference]: Start difference. First operand has 69 places, 34 transitions, 174 flow. Second operand 11 states and 110 transitions. [2024-06-04 14:56:27,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 48 transitions, 298 flow [2024-06-04 14:56:27,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 48 transitions, 274 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-04 14:56:27,896 INFO L231 Difference]: Finished difference. Result has 65 places, 28 transitions, 139 flow [2024-06-04 14:56:27,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=139, PETRI_PLACES=65, PETRI_TRANSITIONS=28} [2024-06-04 14:56:27,896 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 35 predicate places. [2024-06-04 14:56:27,896 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 28 transitions, 139 flow [2024-06-04 14:56:27,897 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) [2024-06-04 14:56:27,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:27,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:27,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-04 14:56:27,897 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)] === [2024-06-04 14:56:27,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:27,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1278293283, now seen corresponding path program 9 times [2024-06-04 14:56:27,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:27,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020460947] [2024-06-04 14:56:27,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:27,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:27,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:28,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:28,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:28,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020460947] [2024-06-04 14:56:28,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020460947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:28,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:28,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-04 14:56:28,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414055844] [2024-06-04 14:56:28,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:28,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-04 14:56:28,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:28,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-04 14:56:28,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-04 14:56:29,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:56:29,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 28 transitions, 139 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) [2024-06-04 14:56:29,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:29,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:56:29,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:29,389 INFO L124 PetriNetUnfolderBase]: 54/128 cut-off events. [2024-06-04 14:56:29,389 INFO L125 PetriNetUnfolderBase]: For 1352/1352 co-relation queries the response was YES. [2024-06-04 14:56:29,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 433 conditions, 128 events. 54/128 cut-off events. For 1352/1352 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 330 event pairs, 17 based on Foata normal form. 6/134 useless extension candidates. Maximal degree in co-relation 402. Up to 66 conditions per place. [2024-06-04 14:56:29,390 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 18 selfloop transitions, 5 changer transitions 16/41 dead transitions. [2024-06-04 14:56:29,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 41 transitions, 245 flow [2024-06-04 14:56:29,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:56:29,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:56:29,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 106 transitions. [2024-06-04 14:56:29,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31085043988269795 [2024-06-04 14:56:29,391 INFO L175 Difference]: Start difference. First operand has 65 places, 28 transitions, 139 flow. Second operand 11 states and 106 transitions. [2024-06-04 14:56:29,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 41 transitions, 245 flow [2024-06-04 14:56:29,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 41 transitions, 223 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-04 14:56:29,392 INFO L231 Difference]: Finished difference. Result has 56 places, 22 transitions, 102 flow [2024-06-04 14:56:29,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=102, PETRI_PLACES=56, PETRI_TRANSITIONS=22} [2024-06-04 14:56:29,392 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 26 predicate places. [2024-06-04 14:56:29,393 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 22 transitions, 102 flow [2024-06-04 14:56:29,393 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) [2024-06-04 14:56:29,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:29,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:29,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-04 14:56:29,393 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)] === [2024-06-04 14:56:29,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:29,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1502319929, now seen corresponding path program 10 times [2024-06-04 14:56:29,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:29,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125349133] [2024-06-04 14:56:29,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:29,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:29,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:30,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:30,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:30,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125349133] [2024-06-04 14:56:30,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125349133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:30,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:30,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 14:56:30,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058026373] [2024-06-04 14:56:30,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:30,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 14:56:30,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:30,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 14:56:30,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-04 14:56:30,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-04 14:56:30,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 22 transitions, 102 flow. Second operand has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:30,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:30,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-04 14:56:30,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:30,585 INFO L124 PetriNetUnfolderBase]: 26/68 cut-off events. [2024-06-04 14:56:30,585 INFO L125 PetriNetUnfolderBase]: For 370/370 co-relation queries the response was YES. [2024-06-04 14:56:30,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191 conditions, 68 events. 26/68 cut-off events. For 370/370 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 99 event pairs, 0 based on Foata normal form. 6/74 useless extension candidates. Maximal degree in co-relation 176. Up to 24 conditions per place. [2024-06-04 14:56:30,586 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 0 selfloop transitions, 0 changer transitions 31/31 dead transitions. [2024-06-04 14:56:30,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 31 transitions, 156 flow [2024-06-04 14:56:30,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:56:30,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:56:30,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 96 transitions. [2024-06-04 14:56:30,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28152492668621704 [2024-06-04 14:56:30,587 INFO L175 Difference]: Start difference. First operand has 56 places, 22 transitions, 102 flow. Second operand 11 states and 96 transitions. [2024-06-04 14:56:30,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 31 transitions, 156 flow [2024-06-04 14:56:30,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 31 transitions, 126 flow, removed 1 selfloop flow, removed 15 redundant places. [2024-06-04 14:56:30,587 INFO L231 Difference]: Finished difference. Result has 41 places, 0 transitions, 0 flow [2024-06-04 14:56:30,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=31, 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=11, PETRI_FLOW=0, PETRI_PLACES=41, PETRI_TRANSITIONS=0} [2024-06-04 14:56:30,587 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 11 predicate places. [2024-06-04 14:56:30,587 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 0 transitions, 0 flow [2024-06-04 14:56:30,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:30,590 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-04 14:56:30,590 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-04 14:56:30,590 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-04 14:56:30,590 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-04 14:56:30,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-04 14:56:30,590 INFO L445 BasicCegarLoop]: Path program histogram: [25, 16, 12, 11, 10, 8, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:30,592 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-04 14:56:30,592 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-04 14:56:30,595 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-04 14:56:30,595 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-04 14:56:30,596 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.06 02:56:30 BasicIcfg [2024-06-04 14:56:30,596 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-04 14:56:30,596 INFO L158 Benchmark]: Toolchain (without parser) took 146317.71ms. Allocated memory was 165.7MB in the beginning and 750.8MB in the end (delta: 585.1MB). Free memory was 120.0MB in the beginning and 650.9MB in the end (delta: -530.9MB). Peak memory consumption was 53.8MB. Max. memory is 16.1GB. [2024-06-04 14:56:30,596 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 117.4MB. Free memory was 89.9MB in the beginning and 89.8MB in the end (delta: 142.7kB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-04 14:56:30,596 INFO L158 Benchmark]: Witness Parser took 0.18ms. Allocated memory is still 165.7MB. Free memory is still 125.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-04 14:56:30,597 INFO L158 Benchmark]: CACSL2BoogieTranslator took 683.35ms. Allocated memory is still 165.7MB. Free memory was 120.0MB in the beginning and 87.1MB in the end (delta: 32.9MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. [2024-06-04 14:56:30,597 INFO L158 Benchmark]: Boogie Procedure Inliner took 58.65ms. Allocated memory is still 165.7MB. Free memory was 87.1MB in the beginning and 84.3MB in the end (delta: 2.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-04 14:56:30,597 INFO L158 Benchmark]: Boogie Preprocessor took 53.93ms. Allocated memory is still 165.7MB. Free memory was 84.3MB in the beginning and 80.9MB in the end (delta: 3.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-04 14:56:30,597 INFO L158 Benchmark]: RCFGBuilder took 826.20ms. Allocated memory is still 165.7MB. Free memory was 80.9MB in the beginning and 90.7MB in the end (delta: -9.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-06-04 14:56:30,597 INFO L158 Benchmark]: TraceAbstraction took 144686.70ms. Allocated memory was 165.7MB in the beginning and 750.8MB in the end (delta: 585.1MB). Free memory was 89.5MB in the beginning and 650.9MB in the end (delta: -561.4MB). Peak memory consumption was 25.7MB. Max. memory is 16.1GB. [2024-06-04 14:56:30,598 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 117.4MB. Free memory was 89.9MB in the beginning and 89.8MB in the end (delta: 142.7kB). There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.18ms. Allocated memory is still 165.7MB. Free memory is still 125.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 683.35ms. Allocated memory is still 165.7MB. Free memory was 120.0MB in the beginning and 87.1MB in the end (delta: 32.9MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 58.65ms. Allocated memory is still 165.7MB. Free memory was 87.1MB in the beginning and 84.3MB in the end (delta: 2.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 53.93ms. Allocated memory is still 165.7MB. Free memory was 84.3MB in the beginning and 80.9MB in the end (delta: 3.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 826.20ms. Allocated memory is still 165.7MB. Free memory was 80.9MB in the beginning and 90.7MB in the end (delta: -9.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 144686.70ms. Allocated memory was 165.7MB in the beginning and 750.8MB in the end (delta: 585.1MB). Free memory was 89.5MB in the beginning and 650.9MB in the end (delta: -561.4MB). Peak memory consumption was 25.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 813]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 814]: 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, 49 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: 144.6s, OverallIterations: 111, TraceHistogramMax: 1, PathProgramHistogramMax: 25, EmptinessCheckTime: 0.0s, AutomataDifference: 46.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6913 SdHoareTripleChecker+Valid, 26.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5889 mSDsluCounter, 3223 SdHoareTripleChecker+Invalid, 22.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2753 mSDsCounter, 1367 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 41483 IncrementalHoareTripleChecker+Invalid, 42850 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1367 mSolverCounterUnsat, 470 mSDtfsCounter, 41483 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1224 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2501 ImplicationChecksByTransitivity, 34.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1404occurred in iteration=60, InterpolantAutomatonStates: 1035, 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: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 96.5s InterpolantComputationTime, 1846 NumberOfCodeBlocks, 1846 NumberOfCodeBlocksAsserted, 111 NumberOfCheckSat, 1735 ConstructedInterpolants, 0 QuantifiedInterpolants, 70559 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 111 InterpolantComputations, 111 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! [2024-06-04 14:56:30,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE