./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe010_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.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe010_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 eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe010_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe010_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-eb4cb34-m [2024-06-21 21:38:49,513 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 21:38:49,560 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 21:38:49,568 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 21:38:49,568 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 21:38:49,590 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 21:38:49,591 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 21:38:49,591 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 21:38:49,591 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 21:38:49,591 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 21:38:49,592 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 21:38:49,592 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 21:38:49,592 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 21:38:49,592 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 21:38:49,593 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 21:38:49,593 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 21:38:49,593 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 21:38:49,593 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 21:38:49,594 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 21:38:49,594 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 21:38:49,594 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 21:38:49,594 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 21:38:49,594 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 21:38:49,595 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 21:38:49,595 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 21:38:49,595 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 21:38:49,595 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 21:38:49,595 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 21:38:49,595 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 21:38:49,596 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 21:38:49,596 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 21:38:49,596 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 21:38:49,596 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:38:49,596 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 21:38:49,596 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 21:38:49,597 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 21:38:49,597 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 21:38:49,597 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 21:38:49,597 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 21:38:49,597 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 21:38:49,597 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 21:38:49,598 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 21:38:49,598 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 21:38:49,598 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 21:38:49,802 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 21:38:49,823 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 21:38:49,825 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 21:38:49,826 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 21:38:49,826 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 21:38:49,827 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe010_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml [2024-06-21 21:38:49,946 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 21:38:49,946 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 21:38:49,947 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe010_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-21 21:38:50,936 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 21:38:51,140 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 21:38:51,140 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe010_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-21 21:38:51,155 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22e3b7473/e80d521b24bb4fae91392b9d660421e2/FLAG20b81fbbf [2024-06-21 21:38:51,164 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22e3b7473/e80d521b24bb4fae91392b9d660421e2 [2024-06-21 21:38:51,165 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 21:38:51,166 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 21:38:51,166 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 21:38:51,166 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 21:38:51,171 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 21:38:51,171 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:38:49" (1/2) ... [2024-06-21 21:38:51,172 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@91749fd and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:38:51, skipping insertion in model container [2024-06-21 21:38:51,173 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:38:49" (1/2) ... [2024-06-21 21:38:51,174 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3ce2869d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:38:51, skipping insertion in model container [2024-06-21 21:38:51,174 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:38:51" (2/2) ... [2024-06-21 21:38:51,174 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@91749fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:38:51, skipping insertion in model container [2024-06-21 21:38:51,175 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:38:51" (2/2) ... [2024-06-21 21:38:51,175 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 21:38:51,248 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 21:38:51,249 INFO L97 edCorrectnessWitness]: Location invariant before [L796-L796] (((((((((((((! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((((((((((((0 <= __unbuffered_cnt && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (x == 0 || x == 1)) && (y$w_buff0 == 0 || y$w_buff0 == 2)) && (y$w_buff1 == 0 || y$w_buff1 == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt) [2024-06-21 21:38:51,250 INFO L97 edCorrectnessWitness]: Location invariant before [L795-L795] (((((((((((((! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((((((((((((0 <= __unbuffered_cnt && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (x == 0 || x == 1)) && (y$w_buff0 == 0 || y$w_buff0 == 2)) && (y$w_buff1 == 0 || y$w_buff1 == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt) [2024-06-21 21:38:51,250 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 21:38:51,250 INFO L106 edCorrectnessWitness]: ghost_update [L793-L793] multithreaded = 1; [2024-06-21 21:38:51,293 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 21:38:51,595 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:38:51,605 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 21:38:51,694 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:38:51,722 INFO L206 MainTranslator]: Completed translation [2024-06-21 21:38:51,723 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:38:51 WrapperNode [2024-06-21 21:38:51,723 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 21:38:51,724 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 21:38:51,727 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 21:38:51,727 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 21:38:51,732 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:38:51" (1/1) ... [2024-06-21 21:38:51,754 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:38:51" (1/1) ... [2024-06-21 21:38:51,782 INFO L138 Inliner]: procedures = 174, calls = 34, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 131 [2024-06-21 21:38:51,786 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 21:38:51,786 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 21:38:51,786 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 21:38:51,786 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 21:38:51,800 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:38:51" (1/1) ... [2024-06-21 21:38:51,800 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:38:51" (1/1) ... [2024-06-21 21:38:51,802 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:38:51" (1/1) ... [2024-06-21 21:38:51,829 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 21:38:51,829 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:38:51" (1/1) ... [2024-06-21 21:38:51,830 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:38:51" (1/1) ... [2024-06-21 21:38:51,835 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:38:51" (1/1) ... [2024-06-21 21:38:51,837 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:38:51" (1/1) ... [2024-06-21 21:38:51,857 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:38:51" (1/1) ... [2024-06-21 21:38:51,859 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:38:51" (1/1) ... [2024-06-21 21:38:51,861 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 21:38:51,861 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 21:38:51,861 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 21:38:51,862 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 21:38:51,862 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:38:51" (1/1) ... [2024-06-21 21:38:51,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:38:51,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 21:38:51,904 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 21:38:51,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 21:38:51,937 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 21:38:51,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 21:38:51,938 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 21:38:51,938 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 21:38:51,938 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 21:38:51,938 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 21:38:51,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 21:38:51,938 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 21:38:51,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 21:38:51,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 21:38:51,940 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 21:38:52,051 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 21:38:52,053 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 21:38:52,329 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 21:38:52,329 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 21:38:52,442 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 21:38:52,442 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 21:38:52,444 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:38:52 BoogieIcfgContainer [2024-06-21 21:38:52,444 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 21:38:52,447 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 21:38:52,447 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 21:38:52,449 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 21:38:52,450 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:38:49" (1/4) ... [2024-06-21 21:38:52,451 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ab42cd5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:38:52, skipping insertion in model container [2024-06-21 21:38:52,451 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 09:38:51" (2/4) ... [2024-06-21 21:38:52,451 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ab42cd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 09:38:52, skipping insertion in model container [2024-06-21 21:38:52,451 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:38:51" (3/4) ... [2024-06-21 21:38:52,451 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ab42cd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 09:38:52, skipping insertion in model container [2024-06-21 21:38:52,451 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:38:52" (4/4) ... [2024-06-21 21:38:52,452 INFO L112 eAbstractionObserver]: Analyzing ICFG safe010_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-21 21:38:52,464 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 21:38:52,465 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-21 21:38:52,465 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 21:38:52,491 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 21:38:52,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 29 transitions, 66 flow [2024-06-21 21:38:52,536 INFO L124 PetriNetUnfolderBase]: 0/27 cut-off events. [2024-06-21 21:38:52,536 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:38:52,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 27 events. 0/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 39 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 21:38:52,538 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 29 transitions, 66 flow [2024-06-21 21:38:52,540 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 21 transitions, 48 flow [2024-06-21 21:38:52,553 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 21:38:52,558 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;@d85683e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 21:38:52,558 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-21 21:38:52,561 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 21:38:52,561 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 21:38:52,561 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:38:52,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:52,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 21:38:52,562 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:38:52,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:52,568 INFO L85 PathProgramCache]: Analyzing trace with hash 324002771, now seen corresponding path program 1 times [2024-06-21 21:38:52,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:52,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346504692] [2024-06-21 21:38:52,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:52,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:52,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:53,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:53,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:53,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346504692] [2024-06-21 21:38:53,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346504692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:53,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:53,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 21:38:53,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974795157] [2024-06-21 21:38:53,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:53,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 21:38:53,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:53,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 21:38:53,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 21:38:53,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2024-06-21 21:38:53,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:53,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:53,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2024-06-21 21:38:53,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:53,343 INFO L124 PetriNetUnfolderBase]: 135/252 cut-off events. [2024-06-21 21:38:53,343 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-06-21 21:38:53,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 518 conditions, 252 events. 135/252 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 871 event pairs, 79 based on Foata normal form. 1/246 useless extension candidates. Maximal degree in co-relation 507. Up to 243 conditions per place. [2024-06-21 21:38:53,348 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 20 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2024-06-21 21:38:53,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 27 transitions, 109 flow [2024-06-21 21:38:53,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 21:38:53,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 21:38:53,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2024-06-21 21:38:53,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5632183908045977 [2024-06-21 21:38:53,366 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 48 flow. Second operand 3 states and 49 transitions. [2024-06-21 21:38:53,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 27 transitions, 109 flow [2024-06-21 21:38:53,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 27 transitions, 106 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-21 21:38:53,370 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 67 flow [2024-06-21 21:38:53,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2024-06-21 21:38:53,374 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 1 predicate places. [2024-06-21 21:38:53,375 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 67 flow [2024-06-21 21:38:53,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:53,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:53,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:53,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 21:38:53,376 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:38:53,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:53,377 INFO L85 PathProgramCache]: Analyzing trace with hash 2129050674, now seen corresponding path program 1 times [2024-06-21 21:38:53,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:53,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527280318] [2024-06-21 21:38:53,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:53,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:53,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:53,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:53,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:53,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527280318] [2024-06-21 21:38:53,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527280318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:53,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:53,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 21:38:53,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303395258] [2024-06-21 21:38:53,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:53,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 21:38:53,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:53,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 21:38:53,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 21:38:53,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2024-06-21 21:38:53,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 67 flow. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:53,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:53,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2024-06-21 21:38:53,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:53,836 INFO L124 PetriNetUnfolderBase]: 132/247 cut-off events. [2024-06-21 21:38:53,836 INFO L125 PetriNetUnfolderBase]: For 50/53 co-relation queries the response was YES. [2024-06-21 21:38:53,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 581 conditions, 247 events. 132/247 cut-off events. For 50/53 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 840 event pairs, 64 based on Foata normal form. 4/249 useless extension candidates. Maximal degree in co-relation 569. Up to 229 conditions per place. [2024-06-21 21:38:53,844 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 24 selfloop transitions, 5 changer transitions 0/33 dead transitions. [2024-06-21 21:38:53,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 33 transitions, 151 flow [2024-06-21 21:38:53,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 21:38:53,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 21:38:53,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 63 transitions. [2024-06-21 21:38:53,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5431034482758621 [2024-06-21 21:38:53,846 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 67 flow. Second operand 4 states and 63 transitions. [2024-06-21 21:38:53,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 33 transitions, 151 flow [2024-06-21 21:38:53,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 33 transitions, 148 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 21:38:53,847 INFO L231 Difference]: Finished difference. Result has 32 places, 25 transitions, 91 flow [2024-06-21 21:38:53,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=91, PETRI_PLACES=32, PETRI_TRANSITIONS=25} [2024-06-21 21:38:53,848 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 4 predicate places. [2024-06-21 21:38:53,848 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 25 transitions, 91 flow [2024-06-21 21:38:53,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:53,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:53,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:53,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 21:38:53,848 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:38:53,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:53,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1576062548, now seen corresponding path program 1 times [2024-06-21 21:38:53,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:53,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539237317] [2024-06-21 21:38:53,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:53,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:53,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:54,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:54,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:54,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539237317] [2024-06-21 21:38:54,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539237317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:54,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:54,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 21:38:54,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956330750] [2024-06-21 21:38:54,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:54,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 21:38:54,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:54,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 21:38:54,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 21:38:54,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-21 21:38:54,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 91 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:54,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:54,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-21 21:38:54,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:54,346 INFO L124 PetriNetUnfolderBase]: 152/280 cut-off events. [2024-06-21 21:38:54,346 INFO L125 PetriNetUnfolderBase]: For 159/159 co-relation queries the response was YES. [2024-06-21 21:38:54,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 732 conditions, 280 events. 152/280 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 948 event pairs, 59 based on Foata normal form. 2/281 useless extension candidates. Maximal degree in co-relation 718. Up to 254 conditions per place. [2024-06-21 21:38:54,349 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 33 selfloop transitions, 7 changer transitions 0/43 dead transitions. [2024-06-21 21:38:54,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 43 transitions, 221 flow [2024-06-21 21:38:54,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:38:54,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:38:54,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 73 transitions. [2024-06-21 21:38:54,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503448275862069 [2024-06-21 21:38:54,350 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 91 flow. Second operand 5 states and 73 transitions. [2024-06-21 21:38:54,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 43 transitions, 221 flow [2024-06-21 21:38:54,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 43 transitions, 210 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-21 21:38:54,352 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 135 flow [2024-06-21 21:38:54,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=135, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2024-06-21 21:38:54,353 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 9 predicate places. [2024-06-21 21:38:54,353 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 135 flow [2024-06-21 21:38:54,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:54,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:54,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:54,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 21:38:54,354 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:38:54,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:54,354 INFO L85 PathProgramCache]: Analyzing trace with hash -2099849209, now seen corresponding path program 1 times [2024-06-21 21:38:54,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:54,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455293425] [2024-06-21 21:38:54,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:54,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:54,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:54,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:54,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:54,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455293425] [2024-06-21 21:38:54,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455293425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:54,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:54,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:38:54,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642414829] [2024-06-21 21:38:54,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:54,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:38:54,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:54,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:38:54,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:38:54,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-21 21:38:54,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 135 flow. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:54,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:54,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-21 21:38:54,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:55,003 INFO L124 PetriNetUnfolderBase]: 149/275 cut-off events. [2024-06-21 21:38:55,003 INFO L125 PetriNetUnfolderBase]: For 273/273 co-relation queries the response was YES. [2024-06-21 21:38:55,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 809 conditions, 275 events. 149/275 cut-off events. For 273/273 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 920 event pairs, 41 based on Foata normal form. 2/276 useless extension candidates. Maximal degree in co-relation 792. Up to 240 conditions per place. [2024-06-21 21:38:55,005 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 37 selfloop transitions, 9 changer transitions 0/49 dead transitions. [2024-06-21 21:38:55,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 49 transitions, 273 flow [2024-06-21 21:38:55,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:38:55,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:38:55,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 86 transitions. [2024-06-21 21:38:55,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4942528735632184 [2024-06-21 21:38:55,010 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 135 flow. Second operand 6 states and 86 transitions. [2024-06-21 21:38:55,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 49 transitions, 273 flow [2024-06-21 21:38:55,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 49 transitions, 273 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-21 21:38:55,014 INFO L231 Difference]: Finished difference. Result has 43 places, 33 transitions, 170 flow [2024-06-21 21:38:55,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=170, PETRI_PLACES=43, PETRI_TRANSITIONS=33} [2024-06-21 21:38:55,015 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 15 predicate places. [2024-06-21 21:38:55,015 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 33 transitions, 170 flow [2024-06-21 21:38:55,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:55,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:55,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:55,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 21:38:55,016 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)] === [2024-06-21 21:38:55,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:55,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1527310829, now seen corresponding path program 1 times [2024-06-21 21:38:55,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:55,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212086524] [2024-06-21 21:38:55,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:55,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:55,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:55,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:55,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:55,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212086524] [2024-06-21 21:38:55,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212086524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:55,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:55,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:38:55,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810888715] [2024-06-21 21:38:55,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:55,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:38:55,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:55,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:38:55,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:38:55,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-06-21 21:38:55,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 170 flow. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:55,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:55,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-06-21 21:38:55,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:55,756 INFO L124 PetriNetUnfolderBase]: 145/267 cut-off events. [2024-06-21 21:38:55,756 INFO L125 PetriNetUnfolderBase]: For 405/405 co-relation queries the response was YES. [2024-06-21 21:38:55,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 864 conditions, 267 events. 145/267 cut-off events. For 405/405 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 874 event pairs, 22 based on Foata normal form. 4/270 useless extension candidates. Maximal degree in co-relation 844. Up to 214 conditions per place. [2024-06-21 21:38:55,758 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 37 selfloop transitions, 10 changer transitions 0/50 dead transitions. [2024-06-21 21:38:55,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 50 transitions, 298 flow [2024-06-21 21:38:55,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:38:55,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:38:55,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 94 transitions. [2024-06-21 21:38:55,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630541871921182 [2024-06-21 21:38:55,759 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 170 flow. Second operand 7 states and 94 transitions. [2024-06-21 21:38:55,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 50 transitions, 298 flow [2024-06-21 21:38:55,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 50 transitions, 281 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-21 21:38:55,761 INFO L231 Difference]: Finished difference. Result has 45 places, 32 transitions, 167 flow [2024-06-21 21:38:55,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=167, PETRI_PLACES=45, PETRI_TRANSITIONS=32} [2024-06-21 21:38:55,762 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 17 predicate places. [2024-06-21 21:38:55,762 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 32 transitions, 167 flow [2024-06-21 21:38:55,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:55,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:55,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:55,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 21:38:55,763 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)] === [2024-06-21 21:38:55,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:55,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1307057581, now seen corresponding path program 1 times [2024-06-21 21:38:55,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:55,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652061715] [2024-06-21 21:38:55,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:55,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:55,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:56,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:56,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:56,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652061715] [2024-06-21 21:38:56,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652061715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:56,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:56,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:38:56,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475756001] [2024-06-21 21:38:56,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:56,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:38:56,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:56,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:38:56,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:38:56,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:38:56,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 32 transitions, 167 flow. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:56,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:56,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:38:56,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:56,320 INFO L124 PetriNetUnfolderBase]: 141/261 cut-off events. [2024-06-21 21:38:56,320 INFO L125 PetriNetUnfolderBase]: For 495/495 co-relation queries the response was YES. [2024-06-21 21:38:56,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 881 conditions, 261 events. 141/261 cut-off events. For 495/495 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 853 event pairs, 36 based on Foata normal form. 2/262 useless extension candidates. Maximal degree in co-relation 859. Up to 244 conditions per place. [2024-06-21 21:38:56,322 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 31 selfloop transitions, 7 changer transitions 0/40 dead transitions. [2024-06-21 21:38:56,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 40 transitions, 263 flow [2024-06-21 21:38:56,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:38:56,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:38:56,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 55 transitions. [2024-06-21 21:38:56,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-21 21:38:56,324 INFO L175 Difference]: Start difference. First operand has 45 places, 32 transitions, 167 flow. Second operand 5 states and 55 transitions. [2024-06-21 21:38:56,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 40 transitions, 263 flow [2024-06-21 21:38:56,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 40 transitions, 236 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 21:38:56,326 INFO L231 Difference]: Finished difference. Result has 44 places, 34 transitions, 169 flow [2024-06-21 21:38:56,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=169, PETRI_PLACES=44, PETRI_TRANSITIONS=34} [2024-06-21 21:38:56,326 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 16 predicate places. [2024-06-21 21:38:56,327 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 34 transitions, 169 flow [2024-06-21 21:38:56,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:56,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:56,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:56,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 21:38:56,327 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:38:56,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:56,328 INFO L85 PathProgramCache]: Analyzing trace with hash 2100362180, now seen corresponding path program 1 times [2024-06-21 21:38:56,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:56,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625917921] [2024-06-21 21:38:56,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:56,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:56,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:56,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:56,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:56,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625917921] [2024-06-21 21:38:56,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625917921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:56,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:56,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:38:56,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620018754] [2024-06-21 21:38:56,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:56,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:38:56,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:56,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:38:56,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:38:56,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:38:56,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 169 flow. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 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) [2024-06-21 21:38:56,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:56,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:38:56,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:56,897 INFO L124 PetriNetUnfolderBase]: 144/266 cut-off events. [2024-06-21 21:38:56,897 INFO L125 PetriNetUnfolderBase]: For 609/609 co-relation queries the response was YES. [2024-06-21 21:38:56,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 920 conditions, 266 events. 144/266 cut-off events. For 609/609 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 866 event pairs, 35 based on Foata normal form. 1/266 useless extension candidates. Maximal degree in co-relation 897. Up to 225 conditions per place. [2024-06-21 21:38:56,899 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 36 selfloop transitions, 14 changer transitions 0/52 dead transitions. [2024-06-21 21:38:56,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 52 transitions, 335 flow [2024-06-21 21:38:56,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:38:56,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:38:56,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 79 transitions. [2024-06-21 21:38:56,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3891625615763547 [2024-06-21 21:38:56,901 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 169 flow. Second operand 7 states and 79 transitions. [2024-06-21 21:38:56,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 52 transitions, 335 flow [2024-06-21 21:38:56,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 52 transitions, 322 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-21 21:38:56,903 INFO L231 Difference]: Finished difference. Result has 48 places, 38 transitions, 213 flow [2024-06-21 21:38:56,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=213, PETRI_PLACES=48, PETRI_TRANSITIONS=38} [2024-06-21 21:38:56,903 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 20 predicate places. [2024-06-21 21:38:56,903 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 38 transitions, 213 flow [2024-06-21 21:38:56,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 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) [2024-06-21 21:38:56,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:56,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:56,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 21:38:56,904 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:38:56,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:56,905 INFO L85 PathProgramCache]: Analyzing trace with hash 2100482150, now seen corresponding path program 2 times [2024-06-21 21:38:56,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:56,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832698654] [2024-06-21 21:38:56,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:56,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:56,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:57,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:57,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:57,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832698654] [2024-06-21 21:38:57,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832698654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:57,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:57,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:38:57,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376454557] [2024-06-21 21:38:57,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:57,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:38:57,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:57,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:38:57,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:38:57,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:38:57,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 38 transitions, 213 flow. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 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) [2024-06-21 21:38:57,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:57,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:38:57,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:57,611 INFO L124 PetriNetUnfolderBase]: 150/276 cut-off events. [2024-06-21 21:38:57,611 INFO L125 PetriNetUnfolderBase]: For 814/814 co-relation queries the response was YES. [2024-06-21 21:38:57,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1030 conditions, 276 events. 150/276 cut-off events. For 814/814 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 911 event pairs, 35 based on Foata normal form. 1/276 useless extension candidates. Maximal degree in co-relation 1006. Up to 247 conditions per place. [2024-06-21 21:38:57,613 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 37 selfloop transitions, 13 changer transitions 0/52 dead transitions. [2024-06-21 21:38:57,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 52 transitions, 365 flow [2024-06-21 21:38:57,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:38:57,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:38:57,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 74 transitions. [2024-06-21 21:38:57,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3645320197044335 [2024-06-21 21:38:57,614 INFO L175 Difference]: Start difference. First operand has 48 places, 38 transitions, 213 flow. Second operand 7 states and 74 transitions. [2024-06-21 21:38:57,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 52 transitions, 365 flow [2024-06-21 21:38:57,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 52 transitions, 346 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 21:38:57,616 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 257 flow [2024-06-21 21:38:57,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=257, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2024-06-21 21:38:57,617 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 24 predicate places. [2024-06-21 21:38:57,617 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 257 flow [2024-06-21 21:38:57,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 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) [2024-06-21 21:38:57,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:57,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:57,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 21:38:57,618 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:38:57,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:57,618 INFO L85 PathProgramCache]: Analyzing trace with hash 2100482336, now seen corresponding path program 1 times [2024-06-21 21:38:57,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:57,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600327305] [2024-06-21 21:38:57,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:57,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:57,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:57,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:57,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:57,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600327305] [2024-06-21 21:38:57,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600327305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:57,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:57,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:38:57,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390933382] [2024-06-21 21:38:57,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:57,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:38:57,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:57,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:38:57,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:38:58,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:38:58,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 257 flow. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 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) [2024-06-21 21:38:58,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:58,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:38:58,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:58,169 INFO L124 PetriNetUnfolderBase]: 156/286 cut-off events. [2024-06-21 21:38:58,170 INFO L125 PetriNetUnfolderBase]: For 1050/1050 co-relation queries the response was YES. [2024-06-21 21:38:58,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1109 conditions, 286 events. 156/286 cut-off events. For 1050/1050 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 954 event pairs, 35 based on Foata normal form. 2/287 useless extension candidates. Maximal degree in co-relation 1083. Up to 235 conditions per place. [2024-06-21 21:38:58,172 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 43 selfloop transitions, 15 changer transitions 0/60 dead transitions. [2024-06-21 21:38:58,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 60 transitions, 437 flow [2024-06-21 21:38:58,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:38:58,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:38:58,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 80 transitions. [2024-06-21 21:38:58,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39408866995073893 [2024-06-21 21:38:58,185 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 257 flow. Second operand 7 states and 80 transitions. [2024-06-21 21:38:58,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 60 transitions, 437 flow [2024-06-21 21:38:58,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 60 transitions, 408 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 21:38:58,188 INFO L231 Difference]: Finished difference. Result has 55 places, 46 transitions, 283 flow [2024-06-21 21:38:58,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=283, PETRI_PLACES=55, PETRI_TRANSITIONS=46} [2024-06-21 21:38:58,189 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 27 predicate places. [2024-06-21 21:38:58,189 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 283 flow [2024-06-21 21:38:58,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 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) [2024-06-21 21:38:58,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:58,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:58,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 21:38:58,190 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:38:58,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:58,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1816654842, now seen corresponding path program 2 times [2024-06-21 21:38:58,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:58,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135378492] [2024-06-21 21:38:58,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:58,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:58,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:58,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:58,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:58,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135378492] [2024-06-21 21:38:58,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135378492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:58,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:58,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:38:58,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798460204] [2024-06-21 21:38:58,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:58,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:38:58,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:58,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:38:58,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:38:58,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:38:58,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 283 flow. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 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) [2024-06-21 21:38:58,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:58,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:38:58,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:58,794 INFO L124 PetriNetUnfolderBase]: 162/296 cut-off events. [2024-06-21 21:38:58,794 INFO L125 PetriNetUnfolderBase]: For 1308/1308 co-relation queries the response was YES. [2024-06-21 21:38:58,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1201 conditions, 296 events. 162/296 cut-off events. For 1308/1308 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 997 event pairs, 34 based on Foata normal form. 2/297 useless extension candidates. Maximal degree in co-relation 1174. Up to 273 conditions per place. [2024-06-21 21:38:58,796 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 44 selfloop transitions, 11 changer transitions 0/57 dead transitions. [2024-06-21 21:38:58,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 57 transitions, 429 flow [2024-06-21 21:38:58,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:38:58,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:38:58,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 64 transitions. [2024-06-21 21:38:58,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.367816091954023 [2024-06-21 21:38:58,798 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 283 flow. Second operand 6 states and 64 transitions. [2024-06-21 21:38:58,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 57 transitions, 429 flow [2024-06-21 21:38:58,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 57 transitions, 414 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 21:38:58,801 INFO L231 Difference]: Finished difference. Result has 59 places, 50 transitions, 324 flow [2024-06-21 21:38:58,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=324, PETRI_PLACES=59, PETRI_TRANSITIONS=50} [2024-06-21 21:38:58,802 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 31 predicate places. [2024-06-21 21:38:58,802 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 50 transitions, 324 flow [2024-06-21 21:38:58,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 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) [2024-06-21 21:38:58,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:58,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:58,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 21:38:58,802 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:38:58,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:58,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1816891992, now seen corresponding path program 3 times [2024-06-21 21:38:58,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:58,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54072198] [2024-06-21 21:38:58,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:58,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:58,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:59,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:59,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:59,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54072198] [2024-06-21 21:38:59,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54072198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:59,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:59,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:38:59,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164370114] [2024-06-21 21:38:59,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:59,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:38:59,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:59,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:38:59,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:38:59,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:38:59,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 50 transitions, 324 flow. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 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) [2024-06-21 21:38:59,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:59,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:38:59,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:59,352 INFO L124 PetriNetUnfolderBase]: 163/298 cut-off events. [2024-06-21 21:38:59,352 INFO L125 PetriNetUnfolderBase]: For 1570/1570 co-relation queries the response was YES. [2024-06-21 21:38:59,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1285 conditions, 298 events. 163/298 cut-off events. For 1570/1570 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1008 event pairs, 35 based on Foata normal form. 2/299 useless extension candidates. Maximal degree in co-relation 1255. Up to 244 conditions per place. [2024-06-21 21:38:59,354 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 42 selfloop transitions, 20 changer transitions 0/64 dead transitions. [2024-06-21 21:38:59,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 64 transitions, 516 flow [2024-06-21 21:38:59,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:38:59,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:38:59,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 72 transitions. [2024-06-21 21:38:59,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41379310344827586 [2024-06-21 21:38:59,357 INFO L175 Difference]: Start difference. First operand has 59 places, 50 transitions, 324 flow. Second operand 6 states and 72 transitions. [2024-06-21 21:38:59,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 64 transitions, 516 flow [2024-06-21 21:38:59,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 64 transitions, 503 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 21:38:59,362 INFO L231 Difference]: Finished difference. Result has 63 places, 52 transitions, 375 flow [2024-06-21 21:38:59,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=375, PETRI_PLACES=63, PETRI_TRANSITIONS=52} [2024-06-21 21:38:59,363 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 35 predicate places. [2024-06-21 21:38:59,363 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 52 transitions, 375 flow [2024-06-21 21:38:59,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 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) [2024-06-21 21:38:59,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:59,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:59,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 21:38:59,364 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:38:59,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:59,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1674161306, now seen corresponding path program 3 times [2024-06-21 21:38:59,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:59,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644809391] [2024-06-21 21:38:59,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:59,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:59,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:59,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:59,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:59,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644809391] [2024-06-21 21:38:59,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644809391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:59,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:59,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:38:59,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188398066] [2024-06-21 21:38:59,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:59,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:38:59,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:59,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:38:59,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:38:59,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:38:59,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 52 transitions, 375 flow. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 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) [2024-06-21 21:38:59,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:59,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:38:59,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:59,921 INFO L124 PetriNetUnfolderBase]: 161/295 cut-off events. [2024-06-21 21:38:59,921 INFO L125 PetriNetUnfolderBase]: For 1800/1800 co-relation queries the response was YES. [2024-06-21 21:38:59,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1327 conditions, 295 events. 161/295 cut-off events. For 1800/1800 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 989 event pairs, 33 based on Foata normal form. 1/295 useless extension candidates. Maximal degree in co-relation 1295. Up to 260 conditions per place. [2024-06-21 21:38:59,923 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 49 selfloop transitions, 13 changer transitions 0/64 dead transitions. [2024-06-21 21:38:59,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 64 transitions, 529 flow [2024-06-21 21:38:59,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:38:59,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:38:59,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 70 transitions. [2024-06-21 21:38:59,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40229885057471265 [2024-06-21 21:38:59,925 INFO L175 Difference]: Start difference. First operand has 63 places, 52 transitions, 375 flow. Second operand 6 states and 70 transitions. [2024-06-21 21:38:59,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 64 transitions, 529 flow [2024-06-21 21:38:59,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 64 transitions, 491 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 21:38:59,929 INFO L231 Difference]: Finished difference. Result has 65 places, 52 transitions, 371 flow [2024-06-21 21:38:59,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=371, PETRI_PLACES=65, PETRI_TRANSITIONS=52} [2024-06-21 21:38:59,929 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 37 predicate places. [2024-06-21 21:38:59,929 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 52 transitions, 371 flow [2024-06-21 21:38:59,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 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) [2024-06-21 21:38:59,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:59,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:59,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 21:38:59,930 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:38:59,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:59,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1816645914, now seen corresponding path program 1 times [2024-06-21 21:38:59,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:59,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095507031] [2024-06-21 21:38:59,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:59,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:59,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:00,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:00,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:00,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095507031] [2024-06-21 21:39:00,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095507031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:00,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:00,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:39:00,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929327737] [2024-06-21 21:39:00,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:00,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:39:00,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:00,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:39:00,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:39:00,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:00,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 52 transitions, 371 flow. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:00,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:00,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:00,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:00,731 INFO L124 PetriNetUnfolderBase]: 158/290 cut-off events. [2024-06-21 21:39:00,732 INFO L125 PetriNetUnfolderBase]: For 1727/1727 co-relation queries the response was YES. [2024-06-21 21:39:00,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1276 conditions, 290 events. 158/290 cut-off events. For 1727/1727 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 957 event pairs, 32 based on Foata normal form. 2/291 useless extension candidates. Maximal degree in co-relation 1244. Up to 267 conditions per place. [2024-06-21 21:39:00,733 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 48 selfloop transitions, 9 changer transitions 0/59 dead transitions. [2024-06-21 21:39:00,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 59 transitions, 501 flow [2024-06-21 21:39:00,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:39:00,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:39:00,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 62 transitions. [2024-06-21 21:39:00,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3563218390804598 [2024-06-21 21:39:00,735 INFO L175 Difference]: Start difference. First operand has 65 places, 52 transitions, 371 flow. Second operand 6 states and 62 transitions. [2024-06-21 21:39:00,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 59 transitions, 501 flow [2024-06-21 21:39:00,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 59 transitions, 468 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 21:39:00,738 INFO L231 Difference]: Finished difference. Result has 66 places, 52 transitions, 360 flow [2024-06-21 21:39:00,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=360, PETRI_PLACES=66, PETRI_TRANSITIONS=52} [2024-06-21 21:39:00,738 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 38 predicate places. [2024-06-21 21:39:00,739 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 52 transitions, 360 flow [2024-06-21 21:39:00,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:00,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:00,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:00,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 21:39:00,739 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:00,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:00,740 INFO L85 PathProgramCache]: Analyzing trace with hash 956687977, now seen corresponding path program 1 times [2024-06-21 21:39:00,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:00,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569606078] [2024-06-21 21:39:00,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:00,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:00,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:01,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:01,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:01,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569606078] [2024-06-21 21:39:01,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569606078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:01,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:01,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:39:01,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212960661] [2024-06-21 21:39:01,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:01,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:39:01,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:01,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:39:01,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:39:01,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:01,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 52 transitions, 360 flow. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:01,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:01,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:01,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:01,615 INFO L124 PetriNetUnfolderBase]: 187/342 cut-off events. [2024-06-21 21:39:01,615 INFO L125 PetriNetUnfolderBase]: For 2144/2144 co-relation queries the response was YES. [2024-06-21 21:39:01,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1499 conditions, 342 events. 187/342 cut-off events. For 2144/2144 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1213 event pairs, 41 based on Foata normal form. 1/342 useless extension candidates. Maximal degree in co-relation 1466. Up to 287 conditions per place. [2024-06-21 21:39:01,618 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 54 selfloop transitions, 26 changer transitions 0/82 dead transitions. [2024-06-21 21:39:01,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 82 transitions, 701 flow [2024-06-21 21:39:01,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:39:01,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:39:01,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 99 transitions. [2024-06-21 21:39:01,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3413793103448276 [2024-06-21 21:39:01,619 INFO L175 Difference]: Start difference. First operand has 66 places, 52 transitions, 360 flow. Second operand 10 states and 99 transitions. [2024-06-21 21:39:01,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 82 transitions, 701 flow [2024-06-21 21:39:01,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 82 transitions, 679 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 21:39:01,624 INFO L231 Difference]: Finished difference. Result has 77 places, 69 transitions, 571 flow [2024-06-21 21:39:01,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=571, PETRI_PLACES=77, PETRI_TRANSITIONS=69} [2024-06-21 21:39:01,625 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 49 predicate places. [2024-06-21 21:39:01,625 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 69 transitions, 571 flow [2024-06-21 21:39:01,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:01,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:01,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:01,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 21:39:01,625 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:01,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:01,626 INFO L85 PathProgramCache]: Analyzing trace with hash 686719030, now seen corresponding path program 1 times [2024-06-21 21:39:01,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:01,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671296833] [2024-06-21 21:39:01,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:01,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:01,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:02,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:02,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:02,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671296833] [2024-06-21 21:39:02,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671296833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:02,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:02,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:39:02,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315645659] [2024-06-21 21:39:02,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:02,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:39:02,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:02,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:39:02,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:39:02,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:02,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 69 transitions, 571 flow. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:02,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:02,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:02,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:02,252 INFO L124 PetriNetUnfolderBase]: 216/388 cut-off events. [2024-06-21 21:39:02,252 INFO L125 PetriNetUnfolderBase]: For 3081/3083 co-relation queries the response was YES. [2024-06-21 21:39:02,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1869 conditions, 388 events. 216/388 cut-off events. For 3081/3083 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1437 event pairs, 33 based on Foata normal form. 6/393 useless extension candidates. Maximal degree in co-relation 1830. Up to 186 conditions per place. [2024-06-21 21:39:02,255 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 57 selfloop transitions, 40 changer transitions 0/99 dead transitions. [2024-06-21 21:39:02,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 99 transitions, 969 flow [2024-06-21 21:39:02,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:39:02,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:39:02,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 101 transitions. [2024-06-21 21:39:02,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4353448275862069 [2024-06-21 21:39:02,257 INFO L175 Difference]: Start difference. First operand has 77 places, 69 transitions, 571 flow. Second operand 8 states and 101 transitions. [2024-06-21 21:39:02,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 99 transitions, 969 flow [2024-06-21 21:39:02,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 99 transitions, 952 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-21 21:39:02,262 INFO L231 Difference]: Finished difference. Result has 84 places, 77 transitions, 715 flow [2024-06-21 21:39:02,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=715, PETRI_PLACES=84, PETRI_TRANSITIONS=77} [2024-06-21 21:39:02,262 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 56 predicate places. [2024-06-21 21:39:02,263 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 77 transitions, 715 flow [2024-06-21 21:39:02,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:02,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:02,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:02,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 21:39:02,263 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:02,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:02,264 INFO L85 PathProgramCache]: Analyzing trace with hash 960410767, now seen corresponding path program 2 times [2024-06-21 21:39:02,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:02,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949093599] [2024-06-21 21:39:02,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:02,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:02,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:02,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:02,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:02,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949093599] [2024-06-21 21:39:02,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949093599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:02,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:02,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:39:02,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121210449] [2024-06-21 21:39:02,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:02,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:39:02,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:02,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:39:02,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:39:02,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:02,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 77 transitions, 715 flow. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:02,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:02,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:02,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:03,140 INFO L124 PetriNetUnfolderBase]: 235/420 cut-off events. [2024-06-21 21:39:03,140 INFO L125 PetriNetUnfolderBase]: For 3879/3881 co-relation queries the response was YES. [2024-06-21 21:39:03,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2227 conditions, 420 events. 235/420 cut-off events. For 3879/3881 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1590 event pairs, 35 based on Foata normal form. 6/425 useless extension candidates. Maximal degree in co-relation 2185. Up to 320 conditions per place. [2024-06-21 21:39:03,143 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 67 selfloop transitions, 31 changer transitions 0/100 dead transitions. [2024-06-21 21:39:03,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 100 transitions, 1075 flow [2024-06-21 21:39:03,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:39:03,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:39:03,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 94 transitions. [2024-06-21 21:39:03,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4051724137931034 [2024-06-21 21:39:03,145 INFO L175 Difference]: Start difference. First operand has 84 places, 77 transitions, 715 flow. Second operand 8 states and 94 transitions. [2024-06-21 21:39:03,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 100 transitions, 1075 flow [2024-06-21 21:39:03,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 100 transitions, 1028 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-21 21:39:03,151 INFO L231 Difference]: Finished difference. Result has 90 places, 84 transitions, 821 flow [2024-06-21 21:39:03,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=821, PETRI_PLACES=90, PETRI_TRANSITIONS=84} [2024-06-21 21:39:03,152 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 62 predicate places. [2024-06-21 21:39:03,152 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 84 transitions, 821 flow [2024-06-21 21:39:03,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:03,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:03,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:03,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 21:39:03,153 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:03,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:03,153 INFO L85 PathProgramCache]: Analyzing trace with hash 960410922, now seen corresponding path program 2 times [2024-06-21 21:39:03,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:03,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112800199] [2024-06-21 21:39:03,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:03,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:03,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:03,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:03,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:03,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112800199] [2024-06-21 21:39:03,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112800199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:03,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:03,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:39:03,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127547274] [2024-06-21 21:39:03,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:03,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:39:03,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:03,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:39:03,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:39:03,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:03,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 84 transitions, 821 flow. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:03,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:03,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:03,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:03,846 INFO L124 PetriNetUnfolderBase]: 247/440 cut-off events. [2024-06-21 21:39:03,846 INFO L125 PetriNetUnfolderBase]: For 4464/4466 co-relation queries the response was YES. [2024-06-21 21:39:03,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2446 conditions, 440 events. 247/440 cut-off events. For 4464/4466 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1679 event pairs, 35 based on Foata normal form. 6/445 useless extension candidates. Maximal degree in co-relation 2401. Up to 324 conditions per place. [2024-06-21 21:39:03,850 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 68 selfloop transitions, 34 changer transitions 0/104 dead transitions. [2024-06-21 21:39:03,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 104 transitions, 1170 flow [2024-06-21 21:39:03,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:39:03,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:39:03,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 95 transitions. [2024-06-21 21:39:03,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40948275862068967 [2024-06-21 21:39:03,852 INFO L175 Difference]: Start difference. First operand has 90 places, 84 transitions, 821 flow. Second operand 8 states and 95 transitions. [2024-06-21 21:39:03,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 104 transitions, 1170 flow [2024-06-21 21:39:03,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 104 transitions, 1123 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 21:39:03,865 INFO L231 Difference]: Finished difference. Result has 94 places, 88 transitions, 897 flow [2024-06-21 21:39:03,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=774, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=897, PETRI_PLACES=94, PETRI_TRANSITIONS=88} [2024-06-21 21:39:03,866 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 66 predicate places. [2024-06-21 21:39:03,866 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 88 transitions, 897 flow [2024-06-21 21:39:03,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:03,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:03,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:03,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 21:39:03,867 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:03,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:03,867 INFO L85 PathProgramCache]: Analyzing trace with hash 960416502, now seen corresponding path program 3 times [2024-06-21 21:39:03,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:03,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391920106] [2024-06-21 21:39:03,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:03,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:03,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:04,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:04,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:04,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391920106] [2024-06-21 21:39:04,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391920106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:04,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:04,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:39:04,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970239586] [2024-06-21 21:39:04,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:04,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:39:04,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:04,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:39:04,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:39:04,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:04,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 88 transitions, 897 flow. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:04,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:04,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:04,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:04,596 INFO L124 PetriNetUnfolderBase]: 241/430 cut-off events. [2024-06-21 21:39:04,596 INFO L125 PetriNetUnfolderBase]: For 4470/4472 co-relation queries the response was YES. [2024-06-21 21:39:04,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2471 conditions, 430 events. 241/430 cut-off events. For 4470/4472 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1640 event pairs, 33 based on Foata normal form. 4/433 useless extension candidates. Maximal degree in co-relation 2424. Up to 320 conditions per place. [2024-06-21 21:39:04,600 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 67 selfloop transitions, 37 changer transitions 0/106 dead transitions. [2024-06-21 21:39:04,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 106 transitions, 1189 flow [2024-06-21 21:39:04,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:39:04,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:39:04,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-21 21:39:04,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-21 21:39:04,601 INFO L175 Difference]: Start difference. First operand has 94 places, 88 transitions, 897 flow. Second operand 10 states and 110 transitions. [2024-06-21 21:39:04,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 106 transitions, 1189 flow [2024-06-21 21:39:04,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 106 transitions, 1119 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 21:39:04,625 INFO L231 Difference]: Finished difference. Result has 99 places, 88 transitions, 906 flow [2024-06-21 21:39:04,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=827, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=906, PETRI_PLACES=99, PETRI_TRANSITIONS=88} [2024-06-21 21:39:04,626 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 71 predicate places. [2024-06-21 21:39:04,626 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 88 transitions, 906 flow [2024-06-21 21:39:04,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:04,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:04,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:04,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 21:39:04,627 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:04,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:04,627 INFO L85 PathProgramCache]: Analyzing trace with hash -359176997, now seen corresponding path program 1 times [2024-06-21 21:39:04,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:04,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947018815] [2024-06-21 21:39:04,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:04,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:04,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:05,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:05,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:05,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947018815] [2024-06-21 21:39:05,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947018815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:05,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:05,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:39:05,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86320451] [2024-06-21 21:39:05,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:05,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:39:05,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:05,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:39:05,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:39:05,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:05,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 88 transitions, 906 flow. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:05,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:05,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:05,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:05,514 INFO L124 PetriNetUnfolderBase]: 239/429 cut-off events. [2024-06-21 21:39:05,514 INFO L125 PetriNetUnfolderBase]: For 4622/4622 co-relation queries the response was YES. [2024-06-21 21:39:05,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2460 conditions, 429 events. 239/429 cut-off events. For 4622/4622 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1633 event pairs, 47 based on Foata normal form. 1/429 useless extension candidates. Maximal degree in co-relation 2412. Up to 400 conditions per place. [2024-06-21 21:39:05,517 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 79 selfloop transitions, 13 changer transitions 0/94 dead transitions. [2024-06-21 21:39:05,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 94 transitions, 1106 flow [2024-06-21 21:39:05,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:39:05,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:39:05,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 64 transitions. [2024-06-21 21:39:05,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.367816091954023 [2024-06-21 21:39:05,520 INFO L175 Difference]: Start difference. First operand has 99 places, 88 transitions, 906 flow. Second operand 6 states and 64 transitions. [2024-06-21 21:39:05,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 94 transitions, 1106 flow [2024-06-21 21:39:05,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 94 transitions, 1017 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-21 21:39:05,528 INFO L231 Difference]: Finished difference. Result has 96 places, 88 transitions, 851 flow [2024-06-21 21:39:05,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=817, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=851, PETRI_PLACES=96, PETRI_TRANSITIONS=88} [2024-06-21 21:39:05,529 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 68 predicate places. [2024-06-21 21:39:05,529 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 88 transitions, 851 flow [2024-06-21 21:39:05,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:05,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:05,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:05,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 21:39:05,530 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:05,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:05,530 INFO L85 PathProgramCache]: Analyzing trace with hash -481724550, now seen corresponding path program 4 times [2024-06-21 21:39:05,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:05,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549394639] [2024-06-21 21:39:05,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:05,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:05,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:05,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:05,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:05,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549394639] [2024-06-21 21:39:05,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549394639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:05,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:05,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:39:05,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074450315] [2024-06-21 21:39:05,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:05,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:39:05,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:05,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:39:05,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:39:06,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:06,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 88 transitions, 851 flow. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:06,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:06,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:06,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:06,251 INFO L124 PetriNetUnfolderBase]: 245/439 cut-off events. [2024-06-21 21:39:06,251 INFO L125 PetriNetUnfolderBase]: For 5110/5110 co-relation queries the response was YES. [2024-06-21 21:39:06,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2455 conditions, 439 events. 245/439 cut-off events. For 5110/5110 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1687 event pairs, 47 based on Foata normal form. 2/440 useless extension candidates. Maximal degree in co-relation 2406. Up to 405 conditions per place. [2024-06-21 21:39:06,254 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 81 selfloop transitions, 16 changer transitions 0/99 dead transitions. [2024-06-21 21:39:06,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 99 transitions, 1089 flow [2024-06-21 21:39:06,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:39:06,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:39:06,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 86 transitions. [2024-06-21 21:39:06,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32950191570881227 [2024-06-21 21:39:06,256 INFO L175 Difference]: Start difference. First operand has 96 places, 88 transitions, 851 flow. Second operand 9 states and 86 transitions. [2024-06-21 21:39:06,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 99 transitions, 1089 flow [2024-06-21 21:39:06,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 99 transitions, 1048 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 21:39:06,265 INFO L231 Difference]: Finished difference. Result has 100 places, 90 transitions, 871 flow [2024-06-21 21:39:06,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=871, PETRI_PLACES=100, PETRI_TRANSITIONS=90} [2024-06-21 21:39:06,266 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 72 predicate places. [2024-06-21 21:39:06,266 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 90 transitions, 871 flow [2024-06-21 21:39:06,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:06,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:06,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:06,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 21:39:06,267 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:06,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:06,267 INFO L85 PathProgramCache]: Analyzing trace with hash -885799169, now seen corresponding path program 3 times [2024-06-21 21:39:06,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:06,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086934937] [2024-06-21 21:39:06,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:06,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:06,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:06,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:06,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:06,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086934937] [2024-06-21 21:39:06,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086934937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:06,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:06,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:39:06,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041466115] [2024-06-21 21:39:06,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:06,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:39:06,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:06,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:39:06,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:39:06,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:06,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 90 transitions, 871 flow. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:06,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:06,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:06,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:07,053 INFO L124 PetriNetUnfolderBase]: 243/434 cut-off events. [2024-06-21 21:39:07,053 INFO L125 PetriNetUnfolderBase]: For 4650/4652 co-relation queries the response was YES. [2024-06-21 21:39:07,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2442 conditions, 434 events. 243/434 cut-off events. For 4650/4652 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1662 event pairs, 44 based on Foata normal form. 3/436 useless extension candidates. Maximal degree in co-relation 2392. Up to 374 conditions per place. [2024-06-21 21:39:07,056 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 80 selfloop transitions, 23 changer transitions 0/105 dead transitions. [2024-06-21 21:39:07,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 105 transitions, 1121 flow [2024-06-21 21:39:07,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:39:07,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:39:07,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 82 transitions. [2024-06-21 21:39:07,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4039408866995074 [2024-06-21 21:39:07,058 INFO L175 Difference]: Start difference. First operand has 100 places, 90 transitions, 871 flow. Second operand 7 states and 82 transitions. [2024-06-21 21:39:07,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 105 transitions, 1121 flow [2024-06-21 21:39:07,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 105 transitions, 1065 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-21 21:39:07,067 INFO L231 Difference]: Finished difference. Result has 99 places, 90 transitions, 872 flow [2024-06-21 21:39:07,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=872, PETRI_PLACES=99, PETRI_TRANSITIONS=90} [2024-06-21 21:39:07,067 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 71 predicate places. [2024-06-21 21:39:07,068 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 90 transitions, 872 flow [2024-06-21 21:39:07,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:07,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:07,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:07,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 21:39:07,068 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:07,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:07,069 INFO L85 PathProgramCache]: Analyzing trace with hash -489076200, now seen corresponding path program 5 times [2024-06-21 21:39:07,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:07,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374749588] [2024-06-21 21:39:07,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:07,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:07,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:07,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:07,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:07,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374749588] [2024-06-21 21:39:07,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374749588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:07,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:07,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:39:07,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826688681] [2024-06-21 21:39:07,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:07,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:39:07,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:07,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:39:07,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:39:07,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:07,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 90 transitions, 872 flow. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:07,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:07,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:07,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:07,732 INFO L124 PetriNetUnfolderBase]: 264/470 cut-off events. [2024-06-21 21:39:07,732 INFO L125 PetriNetUnfolderBase]: For 6065/6065 co-relation queries the response was YES. [2024-06-21 21:39:07,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2713 conditions, 470 events. 264/470 cut-off events. For 6065/6065 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1833 event pairs, 47 based on Foata normal form. 2/471 useless extension candidates. Maximal degree in co-relation 2665. Up to 325 conditions per place. [2024-06-21 21:39:07,735 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 77 selfloop transitions, 31 changer transitions 0/110 dead transitions. [2024-06-21 21:39:07,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 110 transitions, 1276 flow [2024-06-21 21:39:07,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:39:07,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:39:07,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 86 transitions. [2024-06-21 21:39:07,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236453201970443 [2024-06-21 21:39:07,737 INFO L175 Difference]: Start difference. First operand has 99 places, 90 transitions, 872 flow. Second operand 7 states and 86 transitions. [2024-06-21 21:39:07,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 110 transitions, 1276 flow [2024-06-21 21:39:07,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 110 transitions, 1235 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 21:39:07,748 INFO L231 Difference]: Finished difference. Result has 102 places, 95 transitions, 970 flow [2024-06-21 21:39:07,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=970, PETRI_PLACES=102, PETRI_TRANSITIONS=95} [2024-06-21 21:39:07,749 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 74 predicate places. [2024-06-21 21:39:07,750 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 95 transitions, 970 flow [2024-06-21 21:39:07,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:07,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:07,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:07,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 21:39:07,750 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:07,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:07,751 INFO L85 PathProgramCache]: Analyzing trace with hash -156614220, now seen corresponding path program 6 times [2024-06-21 21:39:07,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:07,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985169991] [2024-06-21 21:39:07,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:07,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:07,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:08,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:08,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:08,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985169991] [2024-06-21 21:39:08,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985169991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:08,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:08,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:39:08,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997521852] [2024-06-21 21:39:08,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:08,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:39:08,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:08,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:39:08,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:39:08,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:08,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 95 transitions, 970 flow. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:08,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:08,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:08,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:08,419 INFO L124 PetriNetUnfolderBase]: 256/456 cut-off events. [2024-06-21 21:39:08,420 INFO L125 PetriNetUnfolderBase]: For 6293/6295 co-relation queries the response was YES. [2024-06-21 21:39:08,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2677 conditions, 456 events. 256/456 cut-off events. For 6293/6295 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1782 event pairs, 36 based on Foata normal form. 6/461 useless extension candidates. Maximal degree in co-relation 2627. Up to 321 conditions per place. [2024-06-21 21:39:08,425 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 76 selfloop transitions, 34 changer transitions 0/112 dead transitions. [2024-06-21 21:39:08,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 112 transitions, 1294 flow [2024-06-21 21:39:08,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:39:08,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:39:08,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 88 transitions. [2024-06-21 21:39:08,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43349753694581283 [2024-06-21 21:39:08,426 INFO L175 Difference]: Start difference. First operand has 102 places, 95 transitions, 970 flow. Second operand 7 states and 88 transitions. [2024-06-21 21:39:08,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 112 transitions, 1294 flow [2024-06-21 21:39:08,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 112 transitions, 1224 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-21 21:39:08,439 INFO L231 Difference]: Finished difference. Result has 106 places, 95 transitions, 975 flow [2024-06-21 21:39:08,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=900, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=975, PETRI_PLACES=106, PETRI_TRANSITIONS=95} [2024-06-21 21:39:08,440 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 78 predicate places. [2024-06-21 21:39:08,440 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 95 transitions, 975 flow [2024-06-21 21:39:08,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:08,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:08,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:08,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 21:39:08,441 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:08,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:08,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1530765041, now seen corresponding path program 4 times [2024-06-21 21:39:08,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:08,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237961504] [2024-06-21 21:39:08,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:08,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:08,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:08,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:08,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:08,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237961504] [2024-06-21 21:39:08,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237961504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:08,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:08,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:39:08,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753422698] [2024-06-21 21:39:08,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:08,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:39:08,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:08,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:39:08,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:39:09,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:09,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 95 transitions, 975 flow. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:09,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:09,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:09,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:09,282 INFO L124 PetriNetUnfolderBase]: 270/481 cut-off events. [2024-06-21 21:39:09,283 INFO L125 PetriNetUnfolderBase]: For 6384/6384 co-relation queries the response was YES. [2024-06-21 21:39:09,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2822 conditions, 481 events. 270/481 cut-off events. For 6384/6384 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1923 event pairs, 43 based on Foata normal form. 1/481 useless extension candidates. Maximal degree in co-relation 2771. Up to 401 conditions per place. [2024-06-21 21:39:09,287 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 85 selfloop transitions, 35 changer transitions 0/122 dead transitions. [2024-06-21 21:39:09,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 122 transitions, 1406 flow [2024-06-21 21:39:09,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:39:09,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:39:09,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 106 transitions. [2024-06-21 21:39:09,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36551724137931035 [2024-06-21 21:39:09,288 INFO L175 Difference]: Start difference. First operand has 106 places, 95 transitions, 975 flow. Second operand 10 states and 106 transitions. [2024-06-21 21:39:09,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 122 transitions, 1406 flow [2024-06-21 21:39:09,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 122 transitions, 1319 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 21:39:09,302 INFO L231 Difference]: Finished difference. Result has 115 places, 107 transitions, 1158 flow [2024-06-21 21:39:09,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=899, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1158, PETRI_PLACES=115, PETRI_TRANSITIONS=107} [2024-06-21 21:39:09,302 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 87 predicate places. [2024-06-21 21:39:09,302 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 107 transitions, 1158 flow [2024-06-21 21:39:09,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:09,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:09,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:09,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 21:39:09,303 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:09,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:09,303 INFO L85 PathProgramCache]: Analyzing trace with hash 968788493, now seen corresponding path program 5 times [2024-06-21 21:39:09,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:09,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202709202] [2024-06-21 21:39:09,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:09,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:09,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:09,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:09,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:09,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202709202] [2024-06-21 21:39:09,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202709202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:09,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:09,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:39:09,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374340569] [2024-06-21 21:39:09,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:09,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:39:09,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:09,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:39:09,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:39:09,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:09,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 107 transitions, 1158 flow. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:09,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:09,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:09,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:10,045 INFO L124 PetriNetUnfolderBase]: 298/528 cut-off events. [2024-06-21 21:39:10,045 INFO L125 PetriNetUnfolderBase]: For 7915/7915 co-relation queries the response was YES. [2024-06-21 21:39:10,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3205 conditions, 528 events. 298/528 cut-off events. For 7915/7915 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2167 event pairs, 35 based on Foata normal form. 1/528 useless extension candidates. Maximal degree in co-relation 3149. Up to 385 conditions per place. [2024-06-21 21:39:10,050 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 97 selfloop transitions, 49 changer transitions 0/148 dead transitions. [2024-06-21 21:39:10,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 148 transitions, 1805 flow [2024-06-21 21:39:10,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:39:10,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:39:10,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 110 transitions. [2024-06-21 21:39:10,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421455938697318 [2024-06-21 21:39:10,051 INFO L175 Difference]: Start difference. First operand has 115 places, 107 transitions, 1158 flow. Second operand 9 states and 110 transitions. [2024-06-21 21:39:10,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 148 transitions, 1805 flow [2024-06-21 21:39:10,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 148 transitions, 1726 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-21 21:39:10,067 INFO L231 Difference]: Finished difference. Result has 124 places, 130 transitions, 1497 flow [2024-06-21 21:39:10,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1081, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1497, PETRI_PLACES=124, PETRI_TRANSITIONS=130} [2024-06-21 21:39:10,067 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 96 predicate places. [2024-06-21 21:39:10,067 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 130 transitions, 1497 flow [2024-06-21 21:39:10,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:10,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:10,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:10,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 21:39:10,068 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:10,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:10,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1561576053, now seen corresponding path program 6 times [2024-06-21 21:39:10,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:10,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648995343] [2024-06-21 21:39:10,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:10,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:10,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:10,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:10,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:10,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648995343] [2024-06-21 21:39:10,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648995343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:10,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:10,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:39:10,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533931654] [2024-06-21 21:39:10,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:10,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:39:10,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:10,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:39:10,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:39:10,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:10,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 130 transitions, 1497 flow. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:10,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:10,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:10,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:10,860 INFO L124 PetriNetUnfolderBase]: 292/518 cut-off events. [2024-06-21 21:39:10,860 INFO L125 PetriNetUnfolderBase]: For 8608/8608 co-relation queries the response was YES. [2024-06-21 21:39:10,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3378 conditions, 518 events. 292/518 cut-off events. For 8608/8608 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2104 event pairs, 31 based on Foata normal form. 2/519 useless extension candidates. Maximal degree in co-relation 3318. Up to 401 conditions per place. [2024-06-21 21:39:10,864 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 93 selfloop transitions, 57 changer transitions 0/152 dead transitions. [2024-06-21 21:39:10,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 152 transitions, 1895 flow [2024-06-21 21:39:10,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:39:10,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:39:10,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 116 transitions. [2024-06-21 21:39:10,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-21 21:39:10,865 INFO L175 Difference]: Start difference. First operand has 124 places, 130 transitions, 1497 flow. Second operand 11 states and 116 transitions. [2024-06-21 21:39:10,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 152 transitions, 1895 flow [2024-06-21 21:39:10,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 152 transitions, 1850 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-21 21:39:10,891 INFO L231 Difference]: Finished difference. Result has 134 places, 134 transitions, 1655 flow [2024-06-21 21:39:10,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1454, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1655, PETRI_PLACES=134, PETRI_TRANSITIONS=134} [2024-06-21 21:39:10,891 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 106 predicate places. [2024-06-21 21:39:10,891 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 134 transitions, 1655 flow [2024-06-21 21:39:10,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:10,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:10,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:10,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 21:39:10,892 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:10,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:10,892 INFO L85 PathProgramCache]: Analyzing trace with hash -410184659, now seen corresponding path program 1 times [2024-06-21 21:39:10,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:10,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418740482] [2024-06-21 21:39:10,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:10,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:10,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:11,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:11,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:11,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418740482] [2024-06-21 21:39:11,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418740482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:11,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:11,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:11,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477943630] [2024-06-21 21:39:11,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:11,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:11,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:11,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:11,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:11,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:11,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 134 transitions, 1655 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:11,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:11,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:11,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:11,805 INFO L124 PetriNetUnfolderBase]: 296/526 cut-off events. [2024-06-21 21:39:11,805 INFO L125 PetriNetUnfolderBase]: For 9470/9470 co-relation queries the response was YES. [2024-06-21 21:39:11,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3561 conditions, 526 events. 296/526 cut-off events. For 9470/9470 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2164 event pairs, 17 based on Foata normal form. 2/527 useless extension candidates. Maximal degree in co-relation 3498. Up to 351 conditions per place. [2024-06-21 21:39:11,814 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 95 selfloop transitions, 55 changer transitions 0/152 dead transitions. [2024-06-21 21:39:11,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 152 transitions, 2059 flow [2024-06-21 21:39:11,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:39:11,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:39:11,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 98 transitions. [2024-06-21 21:39:11,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37547892720306514 [2024-06-21 21:39:11,817 INFO L175 Difference]: Start difference. First operand has 134 places, 134 transitions, 1655 flow. Second operand 9 states and 98 transitions. [2024-06-21 21:39:11,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 152 transitions, 2059 flow [2024-06-21 21:39:11,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 152 transitions, 1940 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-21 21:39:11,839 INFO L231 Difference]: Finished difference. Result has 136 places, 135 transitions, 1666 flow [2024-06-21 21:39:11,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1538, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1666, PETRI_PLACES=136, PETRI_TRANSITIONS=135} [2024-06-21 21:39:11,840 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 108 predicate places. [2024-06-21 21:39:11,840 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 135 transitions, 1666 flow [2024-06-21 21:39:11,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:11,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:11,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:11,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 21:39:11,840 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:11,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:11,841 INFO L85 PathProgramCache]: Analyzing trace with hash -189347099, now seen corresponding path program 2 times [2024-06-21 21:39:11,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:11,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205532834] [2024-06-21 21:39:11,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:11,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:11,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:12,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:12,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:12,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205532834] [2024-06-21 21:39:12,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205532834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:12,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:12,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:12,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302074786] [2024-06-21 21:39:12,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:12,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:12,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:12,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:12,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:12,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:12,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 135 transitions, 1666 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:12,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:12,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:12,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:12,802 INFO L124 PetriNetUnfolderBase]: 300/534 cut-off events. [2024-06-21 21:39:12,803 INFO L125 PetriNetUnfolderBase]: For 9475/9475 co-relation queries the response was YES. [2024-06-21 21:39:12,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3593 conditions, 534 events. 300/534 cut-off events. For 9475/9475 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2209 event pairs, 48 based on Foata normal form. 2/535 useless extension candidates. Maximal degree in co-relation 3531. Up to 473 conditions per place. [2024-06-21 21:39:12,807 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 119 selfloop transitions, 29 changer transitions 0/150 dead transitions. [2024-06-21 21:39:12,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 150 transitions, 2020 flow [2024-06-21 21:39:12,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:39:12,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:39:12,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 106 transitions. [2024-06-21 21:39:12,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3322884012539185 [2024-06-21 21:39:12,808 INFO L175 Difference]: Start difference. First operand has 136 places, 135 transitions, 1666 flow. Second operand 11 states and 106 transitions. [2024-06-21 21:39:12,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 150 transitions, 2020 flow [2024-06-21 21:39:12,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 150 transitions, 1875 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 21:39:12,830 INFO L231 Difference]: Finished difference. Result has 140 places, 136 transitions, 1601 flow [2024-06-21 21:39:12,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1528, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1601, PETRI_PLACES=140, PETRI_TRANSITIONS=136} [2024-06-21 21:39:12,834 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 112 predicate places. [2024-06-21 21:39:12,835 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 136 transitions, 1601 flow [2024-06-21 21:39:12,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:12,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:12,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:12,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 21:39:12,835 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:12,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:12,836 INFO L85 PathProgramCache]: Analyzing trace with hash -186545815, now seen corresponding path program 1 times [2024-06-21 21:39:12,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:12,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737477863] [2024-06-21 21:39:12,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:12,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:12,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:13,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:13,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:13,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737477863] [2024-06-21 21:39:13,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737477863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:13,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:13,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:13,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208252706] [2024-06-21 21:39:13,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:13,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:13,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:13,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:13,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:13,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:13,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 136 transitions, 1601 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:13,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:13,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:13,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:13,586 INFO L124 PetriNetUnfolderBase]: 292/522 cut-off events. [2024-06-21 21:39:13,586 INFO L125 PetriNetUnfolderBase]: For 9067/9067 co-relation queries the response was YES. [2024-06-21 21:39:13,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3332 conditions, 522 events. 292/522 cut-off events. For 9067/9067 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2156 event pairs, 30 based on Foata normal form. 4/525 useless extension candidates. Maximal degree in co-relation 3270. Up to 242 conditions per place. [2024-06-21 21:39:13,590 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 75 selfloop transitions, 76 changer transitions 0/153 dead transitions. [2024-06-21 21:39:13,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 153 transitions, 2014 flow [2024-06-21 21:39:13,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:39:13,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:39:13,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 106 transitions. [2024-06-21 21:39:13,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4061302681992337 [2024-06-21 21:39:13,591 INFO L175 Difference]: Start difference. First operand has 140 places, 136 transitions, 1601 flow. Second operand 9 states and 106 transitions. [2024-06-21 21:39:13,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 153 transitions, 2014 flow [2024-06-21 21:39:13,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 153 transitions, 1940 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-21 21:39:13,612 INFO L231 Difference]: Finished difference. Result has 140 places, 136 transitions, 1688 flow [2024-06-21 21:39:13,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1527, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1688, PETRI_PLACES=140, PETRI_TRANSITIONS=136} [2024-06-21 21:39:13,613 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 112 predicate places. [2024-06-21 21:39:13,613 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 136 transitions, 1688 flow [2024-06-21 21:39:13,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:13,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:13,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:13,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 21:39:13,614 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:13,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:13,614 INFO L85 PathProgramCache]: Analyzing trace with hash -71259419, now seen corresponding path program 3 times [2024-06-21 21:39:13,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:13,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858266801] [2024-06-21 21:39:13,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:13,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:13,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:14,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:14,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:14,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858266801] [2024-06-21 21:39:14,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858266801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:14,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:14,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:14,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089189102] [2024-06-21 21:39:14,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:14,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:14,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:14,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:14,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:14,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:14,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 136 transitions, 1688 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:14,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:14,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:14,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:14,525 INFO L124 PetriNetUnfolderBase]: 296/530 cut-off events. [2024-06-21 21:39:14,525 INFO L125 PetriNetUnfolderBase]: For 9445/9445 co-relation queries the response was YES. [2024-06-21 21:39:14,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3484 conditions, 530 events. 296/530 cut-off events. For 9445/9445 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2195 event pairs, 37 based on Foata normal form. 2/531 useless extension candidates. Maximal degree in co-relation 3421. Up to 476 conditions per place. [2024-06-21 21:39:14,529 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 121 selfloop transitions, 25 changer transitions 0/148 dead transitions. [2024-06-21 21:39:14,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 148 transitions, 2017 flow [2024-06-21 21:39:14,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:39:14,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:39:14,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 90 transitions. [2024-06-21 21:39:14,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3448275862068966 [2024-06-21 21:39:14,531 INFO L175 Difference]: Start difference. First operand has 140 places, 136 transitions, 1688 flow. Second operand 9 states and 90 transitions. [2024-06-21 21:39:14,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 148 transitions, 2017 flow [2024-06-21 21:39:14,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 148 transitions, 1837 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 21:39:14,553 INFO L231 Difference]: Finished difference. Result has 141 places, 137 transitions, 1576 flow [2024-06-21 21:39:14,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1508, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1576, PETRI_PLACES=141, PETRI_TRANSITIONS=137} [2024-06-21 21:39:14,553 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 113 predicate places. [2024-06-21 21:39:14,553 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 137 transitions, 1576 flow [2024-06-21 21:39:14,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:14,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:14,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:14,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 21:39:14,554 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:14,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:14,554 INFO L85 PathProgramCache]: Analyzing trace with hash -291851831, now seen corresponding path program 1 times [2024-06-21 21:39:14,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:14,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729972514] [2024-06-21 21:39:14,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:14,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:14,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:15,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:15,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:15,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729972514] [2024-06-21 21:39:15,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729972514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:15,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:15,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:15,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664155584] [2024-06-21 21:39:15,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:15,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:15,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:15,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:15,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:15,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:15,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 137 transitions, 1576 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:15,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:15,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:15,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:15,397 INFO L124 PetriNetUnfolderBase]: 300/538 cut-off events. [2024-06-21 21:39:15,397 INFO L125 PetriNetUnfolderBase]: For 9551/9551 co-relation queries the response was YES. [2024-06-21 21:39:15,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3382 conditions, 538 events. 300/538 cut-off events. For 9551/9551 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2240 event pairs, 42 based on Foata normal form. 2/539 useless extension candidates. Maximal degree in co-relation 3318. Up to 469 conditions per place. [2024-06-21 21:39:15,400 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 118 selfloop transitions, 29 changer transitions 0/149 dead transitions. [2024-06-21 21:39:15,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 149 transitions, 1905 flow [2024-06-21 21:39:15,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:39:15,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:39:15,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 87 transitions. [2024-06-21 21:39:15,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 21:39:15,401 INFO L175 Difference]: Start difference. First operand has 141 places, 137 transitions, 1576 flow. Second operand 8 states and 87 transitions. [2024-06-21 21:39:15,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 149 transitions, 1905 flow [2024-06-21 21:39:15,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 149 transitions, 1856 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 21:39:15,424 INFO L231 Difference]: Finished difference. Result has 143 places, 138 transitions, 1597 flow [2024-06-21 21:39:15,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1527, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1597, PETRI_PLACES=143, PETRI_TRANSITIONS=138} [2024-06-21 21:39:15,424 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 115 predicate places. [2024-06-21 21:39:15,425 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 138 transitions, 1597 flow [2024-06-21 21:39:15,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:15,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:15,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:15,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 21:39:15,425 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:15,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:15,425 INFO L85 PathProgramCache]: Analyzing trace with hash -2039980603, now seen corresponding path program 2 times [2024-06-21 21:39:15,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:15,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009006332] [2024-06-21 21:39:15,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:15,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:15,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:16,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:16,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:16,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009006332] [2024-06-21 21:39:16,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009006332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:16,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:16,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:16,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959572557] [2024-06-21 21:39:16,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:16,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:16,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:16,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:16,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:16,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:16,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 138 transitions, 1597 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:16,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:16,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:16,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:16,236 INFO L124 PetriNetUnfolderBase]: 304/546 cut-off events. [2024-06-21 21:39:16,237 INFO L125 PetriNetUnfolderBase]: For 10272/10272 co-relation queries the response was YES. [2024-06-21 21:39:16,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3440 conditions, 546 events. 304/546 cut-off events. For 10272/10272 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2319 event pairs, 46 based on Foata normal form. 2/547 useless extension candidates. Maximal degree in co-relation 3375. Up to 512 conditions per place. [2024-06-21 21:39:16,240 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 134 selfloop transitions, 11 changer transitions 0/147 dead transitions. [2024-06-21 21:39:16,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 147 transitions, 1913 flow [2024-06-21 21:39:16,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:39:16,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:39:16,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 70 transitions. [2024-06-21 21:39:16,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3448275862068966 [2024-06-21 21:39:16,242 INFO L175 Difference]: Start difference. First operand has 143 places, 138 transitions, 1597 flow. Second operand 7 states and 70 transitions. [2024-06-21 21:39:16,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 147 transitions, 1913 flow [2024-06-21 21:39:16,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 147 transitions, 1853 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 21:39:16,267 INFO L231 Difference]: Finished difference. Result has 144 places, 139 transitions, 1573 flow [2024-06-21 21:39:16,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1537, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1573, PETRI_PLACES=144, PETRI_TRANSITIONS=139} [2024-06-21 21:39:16,268 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 116 predicate places. [2024-06-21 21:39:16,268 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 139 transitions, 1573 flow [2024-06-21 21:39:16,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:16,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:16,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:16,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 21:39:16,269 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:16,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:16,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1743929183, now seen corresponding path program 3 times [2024-06-21 21:39:16,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:16,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912566047] [2024-06-21 21:39:16,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:16,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:16,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:16,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:16,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:16,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912566047] [2024-06-21 21:39:16,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912566047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:16,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:16,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:16,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802657308] [2024-06-21 21:39:16,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:16,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:16,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:16,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:16,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:16,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:16,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 139 transitions, 1573 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:16,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:16,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:16,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:17,076 INFO L124 PetriNetUnfolderBase]: 308/554 cut-off events. [2024-06-21 21:39:17,076 INFO L125 PetriNetUnfolderBase]: For 10826/10826 co-relation queries the response was YES. [2024-06-21 21:39:17,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3458 conditions, 554 events. 308/554 cut-off events. For 10826/10826 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2359 event pairs, 42 based on Foata normal form. 2/555 useless extension candidates. Maximal degree in co-relation 3392. Up to 479 conditions per place. [2024-06-21 21:39:17,079 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 118 selfloop transitions, 30 changer transitions 0/150 dead transitions. [2024-06-21 21:39:17,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 150 transitions, 1906 flow [2024-06-21 21:39:17,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:39:17,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:39:17,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 79 transitions. [2024-06-21 21:39:17,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3891625615763547 [2024-06-21 21:39:17,080 INFO L175 Difference]: Start difference. First operand has 144 places, 139 transitions, 1573 flow. Second operand 7 states and 79 transitions. [2024-06-21 21:39:17,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 150 transitions, 1906 flow [2024-06-21 21:39:17,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 150 transitions, 1880 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 21:39:17,103 INFO L231 Difference]: Finished difference. Result has 146 places, 140 transitions, 1625 flow [2024-06-21 21:39:17,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1547, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1625, PETRI_PLACES=146, PETRI_TRANSITIONS=140} [2024-06-21 21:39:17,104 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 118 predicate places. [2024-06-21 21:39:17,104 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 140 transitions, 1625 flow [2024-06-21 21:39:17,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:17,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:17,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:17,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 21:39:17,104 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:17,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:17,104 INFO L85 PathProgramCache]: Analyzing trace with hash 2018507719, now seen corresponding path program 2 times [2024-06-21 21:39:17,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:17,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778944722] [2024-06-21 21:39:17,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:17,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:17,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:17,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:17,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:17,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778944722] [2024-06-21 21:39:17,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778944722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:17,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:17,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:17,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127899598] [2024-06-21 21:39:17,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:17,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:17,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:17,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:17,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:17,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:17,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 140 transitions, 1625 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:17,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:17,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:17,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:17,974 INFO L124 PetriNetUnfolderBase]: 314/564 cut-off events. [2024-06-21 21:39:17,975 INFO L125 PetriNetUnfolderBase]: For 11590/11590 co-relation queries the response was YES. [2024-06-21 21:39:17,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3580 conditions, 564 events. 314/564 cut-off events. For 11590/11590 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2407 event pairs, 37 based on Foata normal form. 2/565 useless extension candidates. Maximal degree in co-relation 3513. Up to 414 conditions per place. [2024-06-21 21:39:17,979 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 115 selfloop transitions, 43 changer transitions 0/160 dead transitions. [2024-06-21 21:39:17,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 160 transitions, 2100 flow [2024-06-21 21:39:17,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:39:17,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:39:17,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 94 transitions. [2024-06-21 21:39:17,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4051724137931034 [2024-06-21 21:39:17,980 INFO L175 Difference]: Start difference. First operand has 146 places, 140 transitions, 1625 flow. Second operand 8 states and 94 transitions. [2024-06-21 21:39:17,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 160 transitions, 2100 flow [2024-06-21 21:39:18,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 160 transitions, 2032 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 21:39:18,007 INFO L231 Difference]: Finished difference. Result has 149 places, 142 transitions, 1677 flow [2024-06-21 21:39:18,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1559, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1677, PETRI_PLACES=149, PETRI_TRANSITIONS=142} [2024-06-21 21:39:18,007 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 121 predicate places. [2024-06-21 21:39:18,008 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 142 transitions, 1677 flow [2024-06-21 21:39:18,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:18,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:18,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:18,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 21:39:18,008 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:18,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:18,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1743749259, now seen corresponding path program 3 times [2024-06-21 21:39:18,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:18,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276755449] [2024-06-21 21:39:18,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:18,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:18,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:18,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:18,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:18,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276755449] [2024-06-21 21:39:18,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276755449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:18,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:18,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:39:18,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13279177] [2024-06-21 21:39:18,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:18,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:39:18,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:18,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:39:18,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:39:18,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:18,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 142 transitions, 1677 flow. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:18,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:18,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:18,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:18,836 INFO L124 PetriNetUnfolderBase]: 311/560 cut-off events. [2024-06-21 21:39:18,836 INFO L125 PetriNetUnfolderBase]: For 10811/10811 co-relation queries the response was YES. [2024-06-21 21:39:18,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3534 conditions, 560 events. 311/560 cut-off events. For 10811/10811 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2396 event pairs, 47 based on Foata normal form. 2/561 useless extension candidates. Maximal degree in co-relation 3466. Up to 467 conditions per place. [2024-06-21 21:39:18,840 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 115 selfloop transitions, 37 changer transitions 0/154 dead transitions. [2024-06-21 21:39:18,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 154 transitions, 2086 flow [2024-06-21 21:39:18,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:39:18,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:39:18,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 92 transitions. [2024-06-21 21:39:18,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3524904214559387 [2024-06-21 21:39:18,845 INFO L175 Difference]: Start difference. First operand has 149 places, 142 transitions, 1677 flow. Second operand 9 states and 92 transitions. [2024-06-21 21:39:18,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 154 transitions, 2086 flow [2024-06-21 21:39:18,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 154 transitions, 1984 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 21:39:18,872 INFO L231 Difference]: Finished difference. Result has 153 places, 143 transitions, 1694 flow [2024-06-21 21:39:18,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1577, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1694, PETRI_PLACES=153, PETRI_TRANSITIONS=143} [2024-06-21 21:39:18,873 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 125 predicate places. [2024-06-21 21:39:18,873 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 143 transitions, 1694 flow [2024-06-21 21:39:18,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:18,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:18,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:18,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 21:39:18,874 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:18,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:18,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1689969697, now seen corresponding path program 4 times [2024-06-21 21:39:18,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:18,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775884551] [2024-06-21 21:39:18,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:18,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:18,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:19,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:19,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:19,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775884551] [2024-06-21 21:39:19,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775884551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:19,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:19,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:19,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110530220] [2024-06-21 21:39:19,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:19,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:19,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:19,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:19,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:19,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:19,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 143 transitions, 1694 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:19,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:19,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:19,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:19,764 INFO L124 PetriNetUnfolderBase]: 315/568 cut-off events. [2024-06-21 21:39:19,764 INFO L125 PetriNetUnfolderBase]: For 11263/11263 co-relation queries the response was YES. [2024-06-21 21:39:19,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3591 conditions, 568 events. 315/568 cut-off events. For 11263/11263 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2442 event pairs, 17 based on Foata normal form. 2/569 useless extension candidates. Maximal degree in co-relation 3521. Up to 464 conditions per place. [2024-06-21 21:39:19,768 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 122 selfloop transitions, 34 changer transitions 0/158 dead transitions. [2024-06-21 21:39:19,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 158 transitions, 2055 flow [2024-06-21 21:39:19,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:39:19,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:39:19,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 90 transitions. [2024-06-21 21:39:19,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3879310344827586 [2024-06-21 21:39:19,769 INFO L175 Difference]: Start difference. First operand has 153 places, 143 transitions, 1694 flow. Second operand 8 states and 90 transitions. [2024-06-21 21:39:19,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 158 transitions, 2055 flow [2024-06-21 21:39:19,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 158 transitions, 1977 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-21 21:39:19,797 INFO L231 Difference]: Finished difference. Result has 153 places, 144 transitions, 1709 flow [2024-06-21 21:39:19,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1616, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1709, PETRI_PLACES=153, PETRI_TRANSITIONS=144} [2024-06-21 21:39:19,798 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 125 predicate places. [2024-06-21 21:39:19,798 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 144 transitions, 1709 flow [2024-06-21 21:39:19,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:19,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:19,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:19,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 21:39:19,799 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:19,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:19,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1750185293, now seen corresponding path program 4 times [2024-06-21 21:39:19,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:19,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707801754] [2024-06-21 21:39:19,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:19,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:19,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:20,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:20,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:20,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707801754] [2024-06-21 21:39:20,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707801754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:20,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:20,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:20,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302182037] [2024-06-21 21:39:20,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:20,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:20,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:20,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:20,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:20,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:20,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 144 transitions, 1709 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:20,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:20,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:20,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:20,714 INFO L124 PetriNetUnfolderBase]: 319/576 cut-off events. [2024-06-21 21:39:20,715 INFO L125 PetriNetUnfolderBase]: For 11458/11458 co-relation queries the response was YES. [2024-06-21 21:39:20,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3613 conditions, 576 events. 319/576 cut-off events. For 11458/11458 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2508 event pairs, 51 based on Foata normal form. 2/577 useless extension candidates. Maximal degree in co-relation 3544. Up to 544 conditions per place. [2024-06-21 21:39:20,718 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 137 selfloop transitions, 14 changer transitions 0/153 dead transitions. [2024-06-21 21:39:20,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 153 transitions, 2042 flow [2024-06-21 21:39:20,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:39:20,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:39:20,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 72 transitions. [2024-06-21 21:39:20,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35467980295566504 [2024-06-21 21:39:20,729 INFO L175 Difference]: Start difference. First operand has 153 places, 144 transitions, 1709 flow. Second operand 7 states and 72 transitions. [2024-06-21 21:39:20,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 153 transitions, 2042 flow [2024-06-21 21:39:20,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 153 transitions, 1964 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 21:39:20,758 INFO L231 Difference]: Finished difference. Result has 153 places, 145 transitions, 1675 flow [2024-06-21 21:39:20,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1631, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1675, PETRI_PLACES=153, PETRI_TRANSITIONS=145} [2024-06-21 21:39:20,758 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 125 predicate places. [2024-06-21 21:39:20,759 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 145 transitions, 1675 flow [2024-06-21 21:39:20,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:20,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:20,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:20,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 21:39:20,759 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:20,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:20,760 INFO L85 PathProgramCache]: Analyzing trace with hash -2048321091, now seen corresponding path program 1 times [2024-06-21 21:39:20,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:20,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533809143] [2024-06-21 21:39:20,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:20,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:20,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:21,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:21,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:21,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533809143] [2024-06-21 21:39:21,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533809143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:21,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:21,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:21,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520825528] [2024-06-21 21:39:21,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:21,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:21,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:21,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:21,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:21,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:21,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 145 transitions, 1675 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:21,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:21,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:21,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:21,613 INFO L124 PetriNetUnfolderBase]: 316/571 cut-off events. [2024-06-21 21:39:21,613 INFO L125 PetriNetUnfolderBase]: For 10246/10246 co-relation queries the response was YES. [2024-06-21 21:39:21,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3498 conditions, 571 events. 316/571 cut-off events. For 10246/10246 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2473 event pairs, 49 based on Foata normal form. 1/571 useless extension candidates. Maximal degree in co-relation 3429. Up to 531 conditions per place. [2024-06-21 21:39:21,617 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 131 selfloop transitions, 21 changer transitions 0/154 dead transitions. [2024-06-21 21:39:21,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 154 transitions, 2005 flow [2024-06-21 21:39:21,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:39:21,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:39:21,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 86 transitions. [2024-06-21 21:39:21,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32950191570881227 [2024-06-21 21:39:21,618 INFO L175 Difference]: Start difference. First operand has 153 places, 145 transitions, 1675 flow. Second operand 9 states and 86 transitions. [2024-06-21 21:39:21,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 154 transitions, 2005 flow [2024-06-21 21:39:21,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 154 transitions, 1961 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 21:39:21,642 INFO L231 Difference]: Finished difference. Result has 157 places, 145 transitions, 1683 flow [2024-06-21 21:39:21,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1631, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1683, PETRI_PLACES=157, PETRI_TRANSITIONS=145} [2024-06-21 21:39:21,643 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 129 predicate places. [2024-06-21 21:39:21,643 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 145 transitions, 1683 flow [2024-06-21 21:39:21,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:21,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:21,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:21,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 21:39:21,643 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:21,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:21,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1111234515, now seen corresponding path program 5 times [2024-06-21 21:39:21,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:21,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443039845] [2024-06-21 21:39:21,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:21,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:21,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:22,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:22,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:22,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443039845] [2024-06-21 21:39:22,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443039845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:22,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:22,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:22,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959582076] [2024-06-21 21:39:22,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:22,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:22,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:22,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:22,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:22,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:22,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 145 transitions, 1683 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:22,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:22,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:22,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:22,434 INFO L124 PetriNetUnfolderBase]: 313/566 cut-off events. [2024-06-21 21:39:22,434 INFO L125 PetriNetUnfolderBase]: For 10242/10242 co-relation queries the response was YES. [2024-06-21 21:39:22,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3428 conditions, 566 events. 313/566 cut-off events. For 10242/10242 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2455 event pairs, 49 based on Foata normal form. 2/567 useless extension candidates. Maximal degree in co-relation 3358. Up to 525 conditions per place. [2024-06-21 21:39:22,438 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 135 selfloop transitions, 16 changer transitions 0/153 dead transitions. [2024-06-21 21:39:22,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 153 transitions, 2006 flow [2024-06-21 21:39:22,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:39:22,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:39:22,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 72 transitions. [2024-06-21 21:39:22,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35467980295566504 [2024-06-21 21:39:22,439 INFO L175 Difference]: Start difference. First operand has 157 places, 145 transitions, 1683 flow. Second operand 7 states and 72 transitions. [2024-06-21 21:39:22,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 153 transitions, 2006 flow [2024-06-21 21:39:22,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 153 transitions, 1932 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 21:39:22,463 INFO L231 Difference]: Finished difference. Result has 156 places, 145 transitions, 1647 flow [2024-06-21 21:39:22,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1609, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1647, PETRI_PLACES=156, PETRI_TRANSITIONS=145} [2024-06-21 21:39:22,465 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 128 predicate places. [2024-06-21 21:39:22,465 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 145 transitions, 1647 flow [2024-06-21 21:39:22,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:22,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:22,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:22,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 21:39:22,466 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:22,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:22,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1164218153, now seen corresponding path program 5 times [2024-06-21 21:39:22,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:22,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102971865] [2024-06-21 21:39:22,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:22,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:22,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:22,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:22,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:22,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102971865] [2024-06-21 21:39:22,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102971865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:22,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:22,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:39:22,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199386740] [2024-06-21 21:39:22,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:22,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:39:22,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:22,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:39:22,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:39:22,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-06-21 21:39:22,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 145 transitions, 1647 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) [2024-06-21 21:39:22,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:22,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-06-21 21:39:22,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:23,195 INFO L124 PetriNetUnfolderBase]: 317/602 cut-off events. [2024-06-21 21:39:23,195 INFO L125 PetriNetUnfolderBase]: For 17533/17533 co-relation queries the response was YES. [2024-06-21 21:39:23,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3511 conditions, 602 events. 317/602 cut-off events. For 17533/17533 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2774 event pairs, 34 based on Foata normal form. 14/613 useless extension candidates. Maximal degree in co-relation 3440. Up to 247 conditions per place. [2024-06-21 21:39:23,198 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 64 selfloop transitions, 57 changer transitions 26/168 dead transitions. [2024-06-21 21:39:23,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 168 transitions, 2039 flow [2024-06-21 21:39:23,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:39:23,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:39:23,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2024-06-21 21:39:23,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4367816091954023 [2024-06-21 21:39:23,199 INFO L175 Difference]: Start difference. First operand has 156 places, 145 transitions, 1647 flow. Second operand 9 states and 114 transitions. [2024-06-21 21:39:23,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 168 transitions, 2039 flow [2024-06-21 21:39:23,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 168 transitions, 1977 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 21:39:23,223 INFO L231 Difference]: Finished difference. Result has 159 places, 130 transitions, 1560 flow [2024-06-21 21:39:23,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1585, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1560, PETRI_PLACES=159, PETRI_TRANSITIONS=130} [2024-06-21 21:39:23,224 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 131 predicate places. [2024-06-21 21:39:23,224 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 130 transitions, 1560 flow [2024-06-21 21:39:23,224 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) [2024-06-21 21:39:23,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:23,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:23,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 21:39:23,224 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:23,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:23,225 INFO L85 PathProgramCache]: Analyzing trace with hash 209076781, now seen corresponding path program 6 times [2024-06-21 21:39:23,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:23,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290904981] [2024-06-21 21:39:23,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:23,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:23,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:23,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:23,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:23,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290904981] [2024-06-21 21:39:23,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290904981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:23,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:23,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:23,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916623175] [2024-06-21 21:39:23,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:23,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:23,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:23,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:23,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:23,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:23,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 130 transitions, 1560 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:23,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:23,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:23,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:24,159 INFO L124 PetriNetUnfolderBase]: 280/515 cut-off events. [2024-06-21 21:39:24,159 INFO L125 PetriNetUnfolderBase]: For 9379/9379 co-relation queries the response was YES. [2024-06-21 21:39:24,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3165 conditions, 515 events. 280/515 cut-off events. For 9379/9379 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2194 event pairs, 26 based on Foata normal form. 2/516 useless extension candidates. Maximal degree in co-relation 3093. Up to 431 conditions per place. [2024-06-21 21:39:24,162 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 110 selfloop transitions, 35 changer transitions 0/147 dead transitions. [2024-06-21 21:39:24,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 147 transitions, 1898 flow [2024-06-21 21:39:24,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:39:24,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:39:24,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 114 transitions. [2024-06-21 21:39:24,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3573667711598746 [2024-06-21 21:39:24,165 INFO L175 Difference]: Start difference. First operand has 159 places, 130 transitions, 1560 flow. Second operand 11 states and 114 transitions. [2024-06-21 21:39:24,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 147 transitions, 1898 flow [2024-06-21 21:39:24,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 147 transitions, 1743 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-21 21:39:24,187 INFO L231 Difference]: Finished difference. Result has 154 places, 130 transitions, 1479 flow [2024-06-21 21:39:24,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1405, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1479, PETRI_PLACES=154, PETRI_TRANSITIONS=130} [2024-06-21 21:39:24,188 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 126 predicate places. [2024-06-21 21:39:24,188 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 130 transitions, 1479 flow [2024-06-21 21:39:24,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:24,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:24,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:24,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 21:39:24,189 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:24,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:24,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1576665833, now seen corresponding path program 1 times [2024-06-21 21:39:24,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:24,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747390294] [2024-06-21 21:39:24,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:24,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:24,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:24,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:24,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:24,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747390294] [2024-06-21 21:39:24,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747390294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:24,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:24,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:24,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870584317] [2024-06-21 21:39:24,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:24,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:24,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:24,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:24,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:24,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:24,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 130 transitions, 1479 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:24,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:24,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:24,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:24,903 INFO L124 PetriNetUnfolderBase]: 314/589 cut-off events. [2024-06-21 21:39:24,903 INFO L125 PetriNetUnfolderBase]: For 15812/15812 co-relation queries the response was YES. [2024-06-21 21:39:24,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3509 conditions, 589 events. 314/589 cut-off events. For 15812/15812 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2614 event pairs, 40 based on Foata normal form. 8/596 useless extension candidates. Maximal degree in co-relation 3440. Up to 197 conditions per place. [2024-06-21 21:39:24,906 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 79 selfloop transitions, 49 changer transitions 23/153 dead transitions. [2024-06-21 21:39:24,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 153 transitions, 1933 flow [2024-06-21 21:39:24,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:39:24,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:39:24,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 106 transitions. [2024-06-21 21:39:24,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4061302681992337 [2024-06-21 21:39:24,907 INFO L175 Difference]: Start difference. First operand has 154 places, 130 transitions, 1479 flow. Second operand 9 states and 106 transitions. [2024-06-21 21:39:24,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 153 transitions, 1933 flow [2024-06-21 21:39:24,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 153 transitions, 1844 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 21:39:24,935 INFO L231 Difference]: Finished difference. Result has 153 places, 117 transitions, 1323 flow [2024-06-21 21:39:24,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1390, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1323, PETRI_PLACES=153, PETRI_TRANSITIONS=117} [2024-06-21 21:39:24,936 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 125 predicate places. [2024-06-21 21:39:24,936 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 117 transitions, 1323 flow [2024-06-21 21:39:24,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:24,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:24,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:24,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 21:39:24,939 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:24,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:24,939 INFO L85 PathProgramCache]: Analyzing trace with hash 171056019, now seen corresponding path program 2 times [2024-06-21 21:39:24,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:24,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343185690] [2024-06-21 21:39:24,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:24,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:24,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:25,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:25,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:25,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343185690] [2024-06-21 21:39:25,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343185690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:25,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:25,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:25,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435215344] [2024-06-21 21:39:25,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:25,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:25,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:25,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:25,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:25,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:25,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 117 transitions, 1323 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:25,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:25,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:25,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:25,704 INFO L124 PetriNetUnfolderBase]: 341/628 cut-off events. [2024-06-21 21:39:25,704 INFO L125 PetriNetUnfolderBase]: For 19166/19166 co-relation queries the response was YES. [2024-06-21 21:39:25,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3698 conditions, 628 events. 341/628 cut-off events. For 19166/19166 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2836 event pairs, 74 based on Foata normal form. 12/639 useless extension candidates. Maximal degree in co-relation 3639. Up to 394 conditions per place. [2024-06-21 21:39:25,708 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 99 selfloop transitions, 51 changer transitions 7/159 dead transitions. [2024-06-21 21:39:25,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 159 transitions, 1932 flow [2024-06-21 21:39:25,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:39:25,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:39:25,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 112 transitions. [2024-06-21 21:39:25,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38620689655172413 [2024-06-21 21:39:25,709 INFO L175 Difference]: Start difference. First operand has 153 places, 117 transitions, 1323 flow. Second operand 10 states and 112 transitions. [2024-06-21 21:39:25,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 159 transitions, 1932 flow [2024-06-21 21:39:25,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 159 transitions, 1742 flow, removed 3 selfloop flow, removed 16 redundant places. [2024-06-21 21:39:25,740 INFO L231 Difference]: Finished difference. Result has 144 places, 131 transitions, 1476 flow [2024-06-21 21:39:25,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1149, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1476, PETRI_PLACES=144, PETRI_TRANSITIONS=131} [2024-06-21 21:39:25,741 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 116 predicate places. [2024-06-21 21:39:25,741 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 131 transitions, 1476 flow [2024-06-21 21:39:25,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:25,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:25,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:25,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 21:39:25,742 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:25,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:25,743 INFO L85 PathProgramCache]: Analyzing trace with hash 171052299, now seen corresponding path program 3 times [2024-06-21 21:39:25,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:25,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5885773] [2024-06-21 21:39:25,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:25,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:25,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:26,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:26,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:26,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5885773] [2024-06-21 21:39:26,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5885773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:26,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:26,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:26,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481549105] [2024-06-21 21:39:26,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:26,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:26,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:26,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:26,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:26,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:26,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 131 transitions, 1476 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:26,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:26,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:26,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:26,489 INFO L124 PetriNetUnfolderBase]: 365/679 cut-off events. [2024-06-21 21:39:26,489 INFO L125 PetriNetUnfolderBase]: For 22260/22260 co-relation queries the response was YES. [2024-06-21 21:39:26,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4317 conditions, 679 events. 365/679 cut-off events. For 22260/22260 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3169 event pairs, 54 based on Foata normal form. 8/686 useless extension candidates. Maximal degree in co-relation 4262. Up to 259 conditions per place. [2024-06-21 21:39:26,493 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 78 selfloop transitions, 62 changer transitions 12/154 dead transitions. [2024-06-21 21:39:26,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 154 transitions, 1951 flow [2024-06-21 21:39:26,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:39:26,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:39:26,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 106 transitions. [2024-06-21 21:39:26,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4061302681992337 [2024-06-21 21:39:26,494 INFO L175 Difference]: Start difference. First operand has 144 places, 131 transitions, 1476 flow. Second operand 9 states and 106 transitions. [2024-06-21 21:39:26,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 154 transitions, 1951 flow [2024-06-21 21:39:26,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 154 transitions, 1893 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 21:39:26,528 INFO L231 Difference]: Finished difference. Result has 149 places, 124 transitions, 1475 flow [2024-06-21 21:39:26,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1418, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1475, PETRI_PLACES=149, PETRI_TRANSITIONS=124} [2024-06-21 21:39:26,528 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 121 predicate places. [2024-06-21 21:39:26,528 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 124 transitions, 1475 flow [2024-06-21 21:39:26,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:26,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:26,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:26,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 21:39:26,529 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:26,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:26,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1487952203, now seen corresponding path program 4 times [2024-06-21 21:39:26,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:26,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828410038] [2024-06-21 21:39:26,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:26,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:26,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:27,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:27,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:27,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828410038] [2024-06-21 21:39:27,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828410038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:27,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:27,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:27,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714839410] [2024-06-21 21:39:27,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:27,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:27,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:27,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:27,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:27,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:27,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 124 transitions, 1475 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:27,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:27,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:27,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:27,338 INFO L124 PetriNetUnfolderBase]: 353/660 cut-off events. [2024-06-21 21:39:27,338 INFO L125 PetriNetUnfolderBase]: For 24807/24807 co-relation queries the response was YES. [2024-06-21 21:39:27,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4288 conditions, 660 events. 353/660 cut-off events. For 24807/24807 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3064 event pairs, 66 based on Foata normal form. 10/669 useless extension candidates. Maximal degree in co-relation 4232. Up to 438 conditions per place. [2024-06-21 21:39:27,342 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 70 selfloop transitions, 56 changer transitions 15/143 dead transitions. [2024-06-21 21:39:27,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 143 transitions, 1836 flow [2024-06-21 21:39:27,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:39:27,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:39:27,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 103 transitions. [2024-06-21 21:39:27,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3946360153256705 [2024-06-21 21:39:27,343 INFO L175 Difference]: Start difference. First operand has 149 places, 124 transitions, 1475 flow. Second operand 9 states and 103 transitions. [2024-06-21 21:39:27,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 143 transitions, 1836 flow [2024-06-21 21:39:27,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 143 transitions, 1710 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 21:39:27,373 INFO L231 Difference]: Finished difference. Result has 146 places, 118 transitions, 1408 flow [2024-06-21 21:39:27,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1408, PETRI_PLACES=146, PETRI_TRANSITIONS=118} [2024-06-21 21:39:27,373 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 118 predicate places. [2024-06-21 21:39:27,374 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 118 transitions, 1408 flow [2024-06-21 21:39:27,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:27,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:27,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:27,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 21:39:27,374 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:27,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:27,375 INFO L85 PathProgramCache]: Analyzing trace with hash 2086080019, now seen corresponding path program 1 times [2024-06-21 21:39:27,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:27,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862863877] [2024-06-21 21:39:27,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:27,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:27,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:28,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:28,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:28,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862863877] [2024-06-21 21:39:28,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862863877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:28,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:28,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:39:28,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224866519] [2024-06-21 21:39:28,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:28,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:39:28,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:28,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:39:28,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:39:28,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:28,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 118 transitions, 1408 flow. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:28,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:28,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:28,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:28,389 INFO L124 PetriNetUnfolderBase]: 337/640 cut-off events. [2024-06-21 21:39:28,389 INFO L125 PetriNetUnfolderBase]: For 21766/21766 co-relation queries the response was YES. [2024-06-21 21:39:28,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4084 conditions, 640 events. 337/640 cut-off events. For 21766/21766 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3004 event pairs, 69 based on Foata normal form. 12/651 useless extension candidates. Maximal degree in co-relation 4029. Up to 443 conditions per place. [2024-06-21 21:39:28,393 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 82 selfloop transitions, 43 changer transitions 11/138 dead transitions. [2024-06-21 21:39:28,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 138 transitions, 1777 flow [2024-06-21 21:39:28,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:39:28,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:39:28,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 103 transitions. [2024-06-21 21:39:28,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3946360153256705 [2024-06-21 21:39:28,394 INFO L175 Difference]: Start difference. First operand has 146 places, 118 transitions, 1408 flow. Second operand 9 states and 103 transitions. [2024-06-21 21:39:28,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 138 transitions, 1777 flow [2024-06-21 21:39:28,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 138 transitions, 1644 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 21:39:28,422 INFO L231 Difference]: Finished difference. Result has 143 places, 113 transitions, 1335 flow [2024-06-21 21:39:28,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1278, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1335, PETRI_PLACES=143, PETRI_TRANSITIONS=113} [2024-06-21 21:39:28,423 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 115 predicate places. [2024-06-21 21:39:28,423 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 113 transitions, 1335 flow [2024-06-21 21:39:28,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:28,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:28,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:28,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 21:39:28,423 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:28,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:28,424 INFO L85 PathProgramCache]: Analyzing trace with hash 2085926197, now seen corresponding path program 5 times [2024-06-21 21:39:28,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:28,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146187181] [2024-06-21 21:39:28,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:28,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:28,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:28,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:28,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:28,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146187181] [2024-06-21 21:39:28,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146187181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:28,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:28,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:28,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208645545] [2024-06-21 21:39:28,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:28,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:28,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:28,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:28,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:28,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:28,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 113 transitions, 1335 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:28,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:28,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:28,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:29,201 INFO L124 PetriNetUnfolderBase]: 353/680 cut-off events. [2024-06-21 21:39:29,201 INFO L125 PetriNetUnfolderBase]: For 24139/24139 co-relation queries the response was YES. [2024-06-21 21:39:29,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4433 conditions, 680 events. 353/680 cut-off events. For 24139/24139 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3295 event pairs, 73 based on Foata normal form. 8/687 useless extension candidates. Maximal degree in co-relation 4381. Up to 411 conditions per place. [2024-06-21 21:39:29,204 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 88 selfloop transitions, 36 changer transitions 10/136 dead transitions. [2024-06-21 21:39:29,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 136 transitions, 1765 flow [2024-06-21 21:39:29,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:39:29,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:39:29,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 105 transitions. [2024-06-21 21:39:29,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40229885057471265 [2024-06-21 21:39:29,205 INFO L175 Difference]: Start difference. First operand has 143 places, 113 transitions, 1335 flow. Second operand 9 states and 105 transitions. [2024-06-21 21:39:29,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 136 transitions, 1765 flow [2024-06-21 21:39:29,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 136 transitions, 1623 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-21 21:39:29,230 INFO L231 Difference]: Finished difference. Result has 143 places, 108 transitions, 1211 flow [2024-06-21 21:39:29,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1193, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1211, PETRI_PLACES=143, PETRI_TRANSITIONS=108} [2024-06-21 21:39:29,230 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 115 predicate places. [2024-06-21 21:39:29,230 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 108 transitions, 1211 flow [2024-06-21 21:39:29,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:29,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:29,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:29,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 21:39:29,231 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:29,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:29,231 INFO L85 PathProgramCache]: Analyzing trace with hash 2086074067, now seen corresponding path program 6 times [2024-06-21 21:39:29,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:29,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204516265] [2024-06-21 21:39:29,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:29,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:29,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:29,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:29,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:29,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204516265] [2024-06-21 21:39:29,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204516265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:29,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:29,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:29,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812658808] [2024-06-21 21:39:29,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:29,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:29,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:29,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:29,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:29,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:29,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 108 transitions, 1211 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:29,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:29,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:29,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:30,106 INFO L124 PetriNetUnfolderBase]: 333/644 cut-off events. [2024-06-21 21:39:30,106 INFO L125 PetriNetUnfolderBase]: For 24115/24115 co-relation queries the response was YES. [2024-06-21 21:39:30,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4091 conditions, 644 events. 333/644 cut-off events. For 24115/24115 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3070 event pairs, 79 based on Foata normal form. 10/653 useless extension candidates. Maximal degree in co-relation 4039. Up to 473 conditions per place. [2024-06-21 21:39:30,110 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 75 selfloop transitions, 32 changer transitions 16/125 dead transitions. [2024-06-21 21:39:30,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 125 transitions, 1519 flow [2024-06-21 21:39:30,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:39:30,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:39:30,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 100 transitions. [2024-06-21 21:39:30,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3831417624521073 [2024-06-21 21:39:30,111 INFO L175 Difference]: Start difference. First operand has 143 places, 108 transitions, 1211 flow. Second operand 9 states and 100 transitions. [2024-06-21 21:39:30,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 125 transitions, 1519 flow [2024-06-21 21:39:30,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 125 transitions, 1436 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-21 21:39:30,137 INFO L231 Difference]: Finished difference. Result has 138 places, 100 transitions, 1122 flow [2024-06-21 21:39:30,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1128, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1122, PETRI_PLACES=138, PETRI_TRANSITIONS=100} [2024-06-21 21:39:30,138 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 110 predicate places. [2024-06-21 21:39:30,138 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 100 transitions, 1122 flow [2024-06-21 21:39:30,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:30,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:30,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:30,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 21:39:30,138 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:30,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:30,139 INFO L85 PathProgramCache]: Analyzing trace with hash 2091644209, now seen corresponding path program 2 times [2024-06-21 21:39:30,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:30,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762764078] [2024-06-21 21:39:30,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:30,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:30,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:30,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:30,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:30,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762764078] [2024-06-21 21:39:30,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762764078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:30,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:30,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:39:30,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662110830] [2024-06-21 21:39:30,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:30,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:39:30,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:30,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:39:30,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:39:30,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:30,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 100 transitions, 1122 flow. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:30,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:30,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:30,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:31,094 INFO L124 PetriNetUnfolderBase]: 286/567 cut-off events. [2024-06-21 21:39:31,094 INFO L125 PetriNetUnfolderBase]: For 18572/18572 co-relation queries the response was YES. [2024-06-21 21:39:31,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3639 conditions, 567 events. 286/567 cut-off events. For 18572/18572 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2650 event pairs, 72 based on Foata normal form. 2/568 useless extension candidates. Maximal degree in co-relation 3589. Up to 460 conditions per place. [2024-06-21 21:39:31,096 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 77 selfloop transitions, 37 changer transitions 0/116 dead transitions. [2024-06-21 21:39:31,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 116 transitions, 1412 flow [2024-06-21 21:39:31,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:39:31,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:39:31,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 108 transitions. [2024-06-21 21:39:31,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3385579937304075 [2024-06-21 21:39:31,097 INFO L175 Difference]: Start difference. First operand has 138 places, 100 transitions, 1122 flow. Second operand 11 states and 108 transitions. [2024-06-21 21:39:31,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 116 transitions, 1412 flow [2024-06-21 21:39:31,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 116 transitions, 1344 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 21:39:31,120 INFO L231 Difference]: Finished difference. Result has 138 places, 101 transitions, 1157 flow [2024-06-21 21:39:31,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1054, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1157, PETRI_PLACES=138, PETRI_TRANSITIONS=101} [2024-06-21 21:39:31,121 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 110 predicate places. [2024-06-21 21:39:31,121 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 101 transitions, 1157 flow [2024-06-21 21:39:31,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:31,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:31,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:31,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 21:39:31,121 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:31,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:31,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1370491627, now seen corresponding path program 3 times [2024-06-21 21:39:31,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:31,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590355391] [2024-06-21 21:39:31,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:31,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:31,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:31,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:31,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:31,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590355391] [2024-06-21 21:39:31,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590355391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:31,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:31,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:39:31,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530220989] [2024-06-21 21:39:31,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:31,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:39:31,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:31,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:39:31,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:39:31,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:31,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 101 transitions, 1157 flow. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:31,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:31,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:31,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:32,076 INFO L124 PetriNetUnfolderBase]: 290/575 cut-off events. [2024-06-21 21:39:32,076 INFO L125 PetriNetUnfolderBase]: For 17957/17957 co-relation queries the response was YES. [2024-06-21 21:39:32,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3694 conditions, 575 events. 290/575 cut-off events. For 17957/17957 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2702 event pairs, 72 based on Foata normal form. 2/576 useless extension candidates. Maximal degree in co-relation 3645. Up to 444 conditions per place. [2024-06-21 21:39:32,079 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 75 selfloop transitions, 40 changer transitions 0/117 dead transitions. [2024-06-21 21:39:32,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 117 transitions, 1449 flow [2024-06-21 21:39:32,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:39:32,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:39:32,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 109 transitions. [2024-06-21 21:39:32,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34169278996865204 [2024-06-21 21:39:32,080 INFO L175 Difference]: Start difference. First operand has 138 places, 101 transitions, 1157 flow. Second operand 11 states and 109 transitions. [2024-06-21 21:39:32,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 117 transitions, 1449 flow [2024-06-21 21:39:32,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 117 transitions, 1358 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-21 21:39:32,107 INFO L231 Difference]: Finished difference. Result has 140 places, 102 transitions, 1176 flow [2024-06-21 21:39:32,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1176, PETRI_PLACES=140, PETRI_TRANSITIONS=102} [2024-06-21 21:39:32,108 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 112 predicate places. [2024-06-21 21:39:32,108 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 102 transitions, 1176 flow [2024-06-21 21:39:32,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:32,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:32,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:32,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 21:39:32,108 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:32,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:32,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1856279635, now seen corresponding path program 7 times [2024-06-21 21:39:32,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:32,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690101447] [2024-06-21 21:39:32,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:32,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:32,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:32,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:32,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:32,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690101447] [2024-06-21 21:39:32,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690101447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:32,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:32,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:32,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055771708] [2024-06-21 21:39:32,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:32,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:32,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:32,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:32,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:32,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:32,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 102 transitions, 1176 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:32,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:32,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:32,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:32,840 INFO L124 PetriNetUnfolderBase]: 302/603 cut-off events. [2024-06-21 21:39:32,840 INFO L125 PetriNetUnfolderBase]: For 21349/21349 co-relation queries the response was YES. [2024-06-21 21:39:32,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3807 conditions, 603 events. 302/603 cut-off events. For 21349/21349 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2888 event pairs, 72 based on Foata normal form. 8/610 useless extension candidates. Maximal degree in co-relation 3757. Up to 346 conditions per place. [2024-06-21 21:39:32,843 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 82 selfloop transitions, 33 changer transitions 7/124 dead transitions. [2024-06-21 21:39:32,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 124 transitions, 1584 flow [2024-06-21 21:39:32,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:39:32,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:39:32,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 95 transitions. [2024-06-21 21:39:32,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40948275862068967 [2024-06-21 21:39:32,843 INFO L175 Difference]: Start difference. First operand has 140 places, 102 transitions, 1176 flow. Second operand 8 states and 95 transitions. [2024-06-21 21:39:32,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 124 transitions, 1584 flow [2024-06-21 21:39:32,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 124 transitions, 1484 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-21 21:39:32,875 INFO L231 Difference]: Finished difference. Result has 139 places, 100 transitions, 1126 flow [2024-06-21 21:39:32,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1076, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1126, PETRI_PLACES=139, PETRI_TRANSITIONS=100} [2024-06-21 21:39:32,876 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 111 predicate places. [2024-06-21 21:39:32,876 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 100 transitions, 1126 flow [2024-06-21 21:39:32,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:32,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:32,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:32,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 21:39:32,877 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:32,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:32,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1850763433, now seen corresponding path program 4 times [2024-06-21 21:39:32,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:32,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54377419] [2024-06-21 21:39:32,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:32,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:32,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:33,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:33,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:33,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54377419] [2024-06-21 21:39:33,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54377419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:33,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:33,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:39:33,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314270194] [2024-06-21 21:39:33,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:33,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:39:33,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:33,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:39:33,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:39:33,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:33,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 100 transitions, 1126 flow. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:33,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:33,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:33,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:33,782 INFO L124 PetriNetUnfolderBase]: 288/573 cut-off events. [2024-06-21 21:39:33,782 INFO L125 PetriNetUnfolderBase]: For 20397/20397 co-relation queries the response was YES. [2024-06-21 21:39:33,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3740 conditions, 573 events. 288/573 cut-off events. For 20397/20397 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2680 event pairs, 76 based on Foata normal form. 2/574 useless extension candidates. Maximal degree in co-relation 3689. Up to 446 conditions per place. [2024-06-21 21:39:33,785 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 79 selfloop transitions, 35 changer transitions 0/116 dead transitions. [2024-06-21 21:39:33,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 116 transitions, 1434 flow [2024-06-21 21:39:33,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:39:33,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:39:33,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 88 transitions. [2024-06-21 21:39:33,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-06-21 21:39:33,786 INFO L175 Difference]: Start difference. First operand has 139 places, 100 transitions, 1126 flow. Second operand 8 states and 88 transitions. [2024-06-21 21:39:33,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 116 transitions, 1434 flow [2024-06-21 21:39:33,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 116 transitions, 1374 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 21:39:33,816 INFO L231 Difference]: Finished difference. Result has 138 places, 101 transitions, 1168 flow [2024-06-21 21:39:33,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1168, PETRI_PLACES=138, PETRI_TRANSITIONS=101} [2024-06-21 21:39:33,816 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 110 predicate places. [2024-06-21 21:39:33,816 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 101 transitions, 1168 flow [2024-06-21 21:39:33,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:33,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:33,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:33,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 21:39:33,816 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:33,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:33,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1571420751, now seen corresponding path program 5 times [2024-06-21 21:39:33,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:33,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338146348] [2024-06-21 21:39:33,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:33,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:33,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:34,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:34,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:34,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338146348] [2024-06-21 21:39:34,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338146348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:34,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:34,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:39:34,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728948803] [2024-06-21 21:39:34,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:34,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:39:34,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:34,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:39:34,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:39:34,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:34,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 101 transitions, 1168 flow. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:34,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:34,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:34,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:34,706 INFO L124 PetriNetUnfolderBase]: 292/581 cut-off events. [2024-06-21 21:39:34,706 INFO L125 PetriNetUnfolderBase]: For 19655/19655 co-relation queries the response was YES. [2024-06-21 21:39:34,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3821 conditions, 581 events. 292/581 cut-off events. For 19655/19655 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2737 event pairs, 93 based on Foata normal form. 2/582 useless extension candidates. Maximal degree in co-relation 3771. Up to 541 conditions per place. [2024-06-21 21:39:34,713 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 98 selfloop transitions, 12 changer transitions 0/112 dead transitions. [2024-06-21 21:39:34,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 112 transitions, 1438 flow [2024-06-21 21:39:34,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:39:34,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:39:34,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 78 transitions. [2024-06-21 21:39:34,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33620689655172414 [2024-06-21 21:39:34,714 INFO L175 Difference]: Start difference. First operand has 138 places, 101 transitions, 1168 flow. Second operand 8 states and 78 transitions. [2024-06-21 21:39:34,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 112 transitions, 1438 flow [2024-06-21 21:39:34,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 112 transitions, 1346 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 21:39:34,744 INFO L231 Difference]: Finished difference. Result has 140 places, 102 transitions, 1134 flow [2024-06-21 21:39:34,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1076, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1134, PETRI_PLACES=140, PETRI_TRANSITIONS=102} [2024-06-21 21:39:34,744 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 112 predicate places. [2024-06-21 21:39:34,744 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 102 transitions, 1134 flow [2024-06-21 21:39:34,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:34,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:34,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:34,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 21:39:34,745 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:34,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:34,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1175907241, now seen corresponding path program 6 times [2024-06-21 21:39:34,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:34,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179719550] [2024-06-21 21:39:34,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:34,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:34,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:35,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:35,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:35,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179719550] [2024-06-21 21:39:35,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179719550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:35,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:35,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:39:35,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907849474] [2024-06-21 21:39:35,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:35,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:39:35,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:35,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:39:35,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:39:35,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:35,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 102 transitions, 1134 flow. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:35,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:35,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:35,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:35,632 INFO L124 PetriNetUnfolderBase]: 296/589 cut-off events. [2024-06-21 21:39:35,632 INFO L125 PetriNetUnfolderBase]: For 20949/20949 co-relation queries the response was YES. [2024-06-21 21:39:35,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3858 conditions, 589 events. 296/589 cut-off events. For 20949/20949 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2800 event pairs, 97 based on Foata normal form. 2/590 useless extension candidates. Maximal degree in co-relation 3807. Up to 543 conditions per place. [2024-06-21 21:39:35,636 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 91 selfloop transitions, 20 changer transitions 0/113 dead transitions. [2024-06-21 21:39:35,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 113 transitions, 1412 flow [2024-06-21 21:39:35,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:39:35,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:39:35,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 81 transitions. [2024-06-21 21:39:35,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34913793103448276 [2024-06-21 21:39:35,636 INFO L175 Difference]: Start difference. First operand has 140 places, 102 transitions, 1134 flow. Second operand 8 states and 81 transitions. [2024-06-21 21:39:35,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 113 transitions, 1412 flow [2024-06-21 21:39:35,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 113 transitions, 1364 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 21:39:35,668 INFO L231 Difference]: Finished difference. Result has 142 places, 103 transitions, 1163 flow [2024-06-21 21:39:35,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1086, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1163, PETRI_PLACES=142, PETRI_TRANSITIONS=103} [2024-06-21 21:39:35,669 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 114 predicate places. [2024-06-21 21:39:35,669 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 103 transitions, 1163 flow [2024-06-21 21:39:35,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:35,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:35,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:35,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 21:39:35,670 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:35,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:35,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1571680221, now seen corresponding path program 7 times [2024-06-21 21:39:35,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:35,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495511464] [2024-06-21 21:39:35,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:35,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:35,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:36,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:36,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:36,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495511464] [2024-06-21 21:39:36,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495511464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:36,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:36,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:39:36,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019457925] [2024-06-21 21:39:36,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:36,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:39:36,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:36,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:39:36,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:39:36,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:36,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 103 transitions, 1163 flow. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:36,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:36,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:36,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:36,636 INFO L124 PetriNetUnfolderBase]: 300/597 cut-off events. [2024-06-21 21:39:36,636 INFO L125 PetriNetUnfolderBase]: For 22484/22484 co-relation queries the response was YES. [2024-06-21 21:39:36,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3959 conditions, 597 events. 300/597 cut-off events. For 22484/22484 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2852 event pairs, 96 based on Foata normal form. 2/598 useless extension candidates. Maximal degree in co-relation 3907. Up to 527 conditions per place. [2024-06-21 21:39:36,639 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 92 selfloop transitions, 22 changer transitions 0/116 dead transitions. [2024-06-21 21:39:36,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 116 transitions, 1453 flow [2024-06-21 21:39:36,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:39:36,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:39:36,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 95 transitions. [2024-06-21 21:39:36,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3275862068965517 [2024-06-21 21:39:36,640 INFO L175 Difference]: Start difference. First operand has 142 places, 103 transitions, 1163 flow. Second operand 10 states and 95 transitions. [2024-06-21 21:39:36,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 116 transitions, 1453 flow [2024-06-21 21:39:36,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 116 transitions, 1388 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 21:39:36,671 INFO L231 Difference]: Finished difference. Result has 146 places, 104 transitions, 1181 flow [2024-06-21 21:39:36,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1098, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1181, PETRI_PLACES=146, PETRI_TRANSITIONS=104} [2024-06-21 21:39:36,671 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 118 predicate places. [2024-06-21 21:39:36,671 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 104 transitions, 1181 flow [2024-06-21 21:39:36,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:36,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:36,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:36,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 21:39:36,672 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:36,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:36,672 INFO L85 PathProgramCache]: Analyzing trace with hash -650002505, now seen corresponding path program 8 times [2024-06-21 21:39:36,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:36,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924525396] [2024-06-21 21:39:36,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:36,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:36,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:37,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:37,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:37,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924525396] [2024-06-21 21:39:37,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924525396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:37,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:37,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:37,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262466836] [2024-06-21 21:39:37,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:37,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:37,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:37,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:37,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:37,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:37,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 104 transitions, 1181 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:37,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:37,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:37,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:37,492 INFO L124 PetriNetUnfolderBase]: 316/633 cut-off events. [2024-06-21 21:39:37,492 INFO L125 PetriNetUnfolderBase]: For 27688/27688 co-relation queries the response was YES. [2024-06-21 21:39:37,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4077 conditions, 633 events. 316/633 cut-off events. For 27688/27688 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3100 event pairs, 88 based on Foata normal form. 10/642 useless extension candidates. Maximal degree in co-relation 4024. Up to 470 conditions per place. [2024-06-21 21:39:37,496 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 71 selfloop transitions, 30 changer transitions 18/121 dead transitions. [2024-06-21 21:39:37,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 121 transitions, 1483 flow [2024-06-21 21:39:37,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:39:37,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:39:37,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 93 transitions. [2024-06-21 21:39:37,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40086206896551724 [2024-06-21 21:39:37,497 INFO L175 Difference]: Start difference. First operand has 146 places, 104 transitions, 1181 flow. Second operand 8 states and 93 transitions. [2024-06-21 21:39:37,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 121 transitions, 1483 flow [2024-06-21 21:39:37,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 121 transitions, 1412 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 21:39:37,533 INFO L231 Difference]: Finished difference. Result has 146 places, 93 transitions, 1042 flow [2024-06-21 21:39:37,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1110, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1042, PETRI_PLACES=146, PETRI_TRANSITIONS=93} [2024-06-21 21:39:37,533 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 118 predicate places. [2024-06-21 21:39:37,533 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 93 transitions, 1042 flow [2024-06-21 21:39:37,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:37,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:37,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:37,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 21:39:37,534 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:37,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:37,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1772769471, now seen corresponding path program 8 times [2024-06-21 21:39:37,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:37,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067232160] [2024-06-21 21:39:37,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:37,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:37,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:38,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:38,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:38,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067232160] [2024-06-21 21:39:38,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067232160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:38,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:38,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:38,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981300456] [2024-06-21 21:39:38,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:38,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:38,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:38,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:38,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:38,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:38,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 93 transitions, 1042 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:38,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:38,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:38,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:38,317 INFO L124 PetriNetUnfolderBase]: 286/591 cut-off events. [2024-06-21 21:39:38,317 INFO L125 PetriNetUnfolderBase]: For 26666/26666 co-relation queries the response was YES. [2024-06-21 21:39:38,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3924 conditions, 591 events. 286/591 cut-off events. For 26666/26666 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2906 event pairs, 90 based on Foata normal form. 2/592 useless extension candidates. Maximal degree in co-relation 3870. Up to 398 conditions per place. [2024-06-21 21:39:38,320 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 84 selfloop transitions, 28 changer transitions 0/114 dead transitions. [2024-06-21 21:39:38,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 114 transitions, 1468 flow [2024-06-21 21:39:38,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:39:38,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:39:38,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 91 transitions. [2024-06-21 21:39:38,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3922413793103448 [2024-06-21 21:39:38,321 INFO L175 Difference]: Start difference. First operand has 146 places, 93 transitions, 1042 flow. Second operand 8 states and 91 transitions. [2024-06-21 21:39:38,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 114 transitions, 1468 flow [2024-06-21 21:39:38,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 114 transitions, 1371 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-21 21:39:38,357 INFO L231 Difference]: Finished difference. Result has 141 places, 95 transitions, 1079 flow [2024-06-21 21:39:38,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=949, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1079, PETRI_PLACES=141, PETRI_TRANSITIONS=95} [2024-06-21 21:39:38,357 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 113 predicate places. [2024-06-21 21:39:38,357 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 95 transitions, 1079 flow [2024-06-21 21:39:38,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:38,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:38,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:38,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 21:39:38,358 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:38,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:38,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1778491203, now seen corresponding path program 9 times [2024-06-21 21:39:38,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:38,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018806196] [2024-06-21 21:39:38,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:38,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:38,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:38,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:38,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:38,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018806196] [2024-06-21 21:39:38,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018806196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:38,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:38,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:38,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453065812] [2024-06-21 21:39:38,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:38,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:38,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:38,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:38,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:38,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:38,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 95 transitions, 1079 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:38,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:38,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:38,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:39,071 INFO L124 PetriNetUnfolderBase]: 270/563 cut-off events. [2024-06-21 21:39:39,071 INFO L125 PetriNetUnfolderBase]: For 24166/24166 co-relation queries the response was YES. [2024-06-21 21:39:39,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3376 conditions, 563 events. 270/563 cut-off events. For 24166/24166 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2742 event pairs, 78 based on Foata normal form. 12/574 useless extension candidates. Maximal degree in co-relation 3324. Up to 416 conditions per place. [2024-06-21 21:39:39,074 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 72 selfloop transitions, 29 changer transitions 9/112 dead transitions. [2024-06-21 21:39:39,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 112 transitions, 1363 flow [2024-06-21 21:39:39,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:39:39,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:39:39,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 91 transitions. [2024-06-21 21:39:39,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3922413793103448 [2024-06-21 21:39:39,075 INFO L175 Difference]: Start difference. First operand has 141 places, 95 transitions, 1079 flow. Second operand 8 states and 91 transitions. [2024-06-21 21:39:39,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 112 transitions, 1363 flow [2024-06-21 21:39:39,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 112 transitions, 1254 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 21:39:39,106 INFO L231 Difference]: Finished difference. Result has 143 places, 91 transitions, 988 flow [2024-06-21 21:39:39,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=970, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=988, PETRI_PLACES=143, PETRI_TRANSITIONS=91} [2024-06-21 21:39:39,107 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 115 predicate places. [2024-06-21 21:39:39,107 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 91 transitions, 988 flow [2024-06-21 21:39:39,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:39,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:39,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:39,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 21:39:39,107 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:39,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:39,107 INFO L85 PathProgramCache]: Analyzing trace with hash -2108549771, now seen corresponding path program 10 times [2024-06-21 21:39:39,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:39,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762593013] [2024-06-21 21:39:39,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:39,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:39,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:39,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:39,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:39,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762593013] [2024-06-21 21:39:39,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762593013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:39,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:39,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:39,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883830449] [2024-06-21 21:39:39,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:39,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:39,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:39,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:39,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:39,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:39,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 91 transitions, 988 flow. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:39,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:39,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:39,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:39,896 INFO L124 PetriNetUnfolderBase]: 244/517 cut-off events. [2024-06-21 21:39:39,897 INFO L125 PetriNetUnfolderBase]: For 21008/21008 co-relation queries the response was YES. [2024-06-21 21:39:39,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2894 conditions, 517 events. 244/517 cut-off events. For 21008/21008 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2476 event pairs, 72 based on Foata normal form. 12/528 useless extension candidates. Maximal degree in co-relation 2842. Up to 295 conditions per place. [2024-06-21 21:39:39,899 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 65 selfloop transitions, 31 changer transitions 12/110 dead transitions. [2024-06-21 21:39:39,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 110 transitions, 1270 flow [2024-06-21 21:39:39,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:39:39,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:39:39,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 108 transitions. [2024-06-21 21:39:39,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3724137931034483 [2024-06-21 21:39:39,900 INFO L175 Difference]: Start difference. First operand has 143 places, 91 transitions, 988 flow. Second operand 10 states and 108 transitions. [2024-06-21 21:39:39,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 110 transitions, 1270 flow [2024-06-21 21:39:39,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 110 transitions, 1184 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-21 21:39:39,929 INFO L231 Difference]: Finished difference. Result has 143 places, 82 transitions, 888 flow [2024-06-21 21:39:39,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=904, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=888, PETRI_PLACES=143, PETRI_TRANSITIONS=82} [2024-06-21 21:39:39,929 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 115 predicate places. [2024-06-21 21:39:39,929 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 82 transitions, 888 flow [2024-06-21 21:39:39,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:39,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:39,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:39,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 21:39:39,930 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:39,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:39,930 INFO L85 PathProgramCache]: Analyzing trace with hash -595097996, now seen corresponding path program 1 times [2024-06-21 21:39:39,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:39,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060146935] [2024-06-21 21:39:39,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:39,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:39,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:40,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:40,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:40,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060146935] [2024-06-21 21:39:40,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060146935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:40,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:40,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:39:40,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632092981] [2024-06-21 21:39:40,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:40,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:39:40,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:40,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:39:40,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:39:40,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:40,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 82 transitions, 888 flow. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 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) [2024-06-21 21:39:40,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:40,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:40,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:40,876 INFO L124 PetriNetUnfolderBase]: 207/443 cut-off events. [2024-06-21 21:39:40,876 INFO L125 PetriNetUnfolderBase]: For 14438/14438 co-relation queries the response was YES. [2024-06-21 21:39:40,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2406 conditions, 443 events. 207/443 cut-off events. For 14438/14438 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2029 event pairs, 55 based on Foata normal form. 6/448 useless extension candidates. Maximal degree in co-relation 2355. Up to 248 conditions per place. [2024-06-21 21:39:40,879 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 42 selfloop transitions, 33 changer transitions 20/97 dead transitions. [2024-06-21 21:39:40,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 97 transitions, 1118 flow [2024-06-21 21:39:40,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:39:40,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:39:40,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 98 transitions. [2024-06-21 21:39:40,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33793103448275863 [2024-06-21 21:39:40,880 INFO L175 Difference]: Start difference. First operand has 143 places, 82 transitions, 888 flow. Second operand 10 states and 98 transitions. [2024-06-21 21:39:40,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 97 transitions, 1118 flow [2024-06-21 21:39:40,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 97 transitions, 879 flow, removed 25 selfloop flow, removed 19 redundant places. [2024-06-21 21:39:40,900 INFO L231 Difference]: Finished difference. Result has 131 places, 72 transitions, 637 flow [2024-06-21 21:39:40,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=652, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=637, PETRI_PLACES=131, PETRI_TRANSITIONS=72} [2024-06-21 21:39:40,901 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 103 predicate places. [2024-06-21 21:39:40,901 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 72 transitions, 637 flow [2024-06-21 21:39:40,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 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) [2024-06-21 21:39:40,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:40,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:40,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 21:39:40,901 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:40,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:40,902 INFO L85 PathProgramCache]: Analyzing trace with hash 464433258, now seen corresponding path program 2 times [2024-06-21 21:39:40,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:40,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129905572] [2024-06-21 21:39:40,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:40,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:40,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:41,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:41,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:41,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129905572] [2024-06-21 21:39:41,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129905572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:41,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:41,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:39:41,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605209674] [2024-06-21 21:39:41,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:41,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:39:41,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:41,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:39:41,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:39:41,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:41,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 72 transitions, 637 flow. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 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) [2024-06-21 21:39:41,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:41,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:41,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:41,984 INFO L124 PetriNetUnfolderBase]: 185/395 cut-off events. [2024-06-21 21:39:41,984 INFO L125 PetriNetUnfolderBase]: For 13536/13536 co-relation queries the response was YES. [2024-06-21 21:39:41,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1915 conditions, 395 events. 185/395 cut-off events. For 13536/13536 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1737 event pairs, 48 based on Foata normal form. 6/400 useless extension candidates. Maximal degree in co-relation 1874. Up to 240 conditions per place. [2024-06-21 21:39:41,986 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 44 selfloop transitions, 34 changer transitions 10/90 dead transitions. [2024-06-21 21:39:41,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 90 transitions, 856 flow [2024-06-21 21:39:41,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:39:41,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:39:41,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 116 transitions. [2024-06-21 21:39:41,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-06-21 21:39:41,987 INFO L175 Difference]: Start difference. First operand has 131 places, 72 transitions, 637 flow. Second operand 12 states and 116 transitions. [2024-06-21 21:39:41,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 90 transitions, 856 flow [2024-06-21 21:39:42,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 90 transitions, 776 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-21 21:39:42,001 INFO L231 Difference]: Finished difference. Result has 120 places, 68 transitions, 601 flow [2024-06-21 21:39:42,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=557, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=601, PETRI_PLACES=120, PETRI_TRANSITIONS=68} [2024-06-21 21:39:42,001 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 92 predicate places. [2024-06-21 21:39:42,001 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 68 transitions, 601 flow [2024-06-21 21:39:42,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 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) [2024-06-21 21:39:42,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:42,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:42,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 21:39:42,002 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:42,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:42,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1296943432, now seen corresponding path program 3 times [2024-06-21 21:39:42,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:42,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926291217] [2024-06-21 21:39:42,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:42,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:42,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:42,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:42,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:42,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926291217] [2024-06-21 21:39:42,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926291217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:42,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:42,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:39:42,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081272666] [2024-06-21 21:39:42,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:42,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:39:42,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:42,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:39:42,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:39:42,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:42,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 68 transitions, 601 flow. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 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) [2024-06-21 21:39:42,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:42,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:42,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:43,304 INFO L124 PetriNetUnfolderBase]: 173/375 cut-off events. [2024-06-21 21:39:43,305 INFO L125 PetriNetUnfolderBase]: For 9153/9153 co-relation queries the response was YES. [2024-06-21 21:39:43,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1750 conditions, 375 events. 173/375 cut-off events. For 9153/9153 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1634 event pairs, 50 based on Foata normal form. 6/380 useless extension candidates. Maximal degree in co-relation 1714. Up to 244 conditions per place. [2024-06-21 21:39:43,307 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 41 selfloop transitions, 24 changer transitions 19/86 dead transitions. [2024-06-21 21:39:43,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 86 transitions, 813 flow [2024-06-21 21:39:43,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:39:43,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:39:43,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 114 transitions. [2024-06-21 21:39:43,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3275862068965517 [2024-06-21 21:39:43,307 INFO L175 Difference]: Start difference. First operand has 120 places, 68 transitions, 601 flow. Second operand 12 states and 114 transitions. [2024-06-21 21:39:43,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 86 transitions, 813 flow [2024-06-21 21:39:43,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 86 transitions, 735 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-21 21:39:43,319 INFO L231 Difference]: Finished difference. Result has 116 places, 59 transitions, 497 flow [2024-06-21 21:39:43,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=497, PETRI_PLACES=116, PETRI_TRANSITIONS=59} [2024-06-21 21:39:43,319 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 88 predicate places. [2024-06-21 21:39:43,319 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 59 transitions, 497 flow [2024-06-21 21:39:43,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 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) [2024-06-21 21:39:43,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:43,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:43,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 21:39:43,320 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:43,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:43,320 INFO L85 PathProgramCache]: Analyzing trace with hash 243971884, now seen corresponding path program 4 times [2024-06-21 21:39:43,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:43,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332357067] [2024-06-21 21:39:43,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:43,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:43,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:44,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:44,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:44,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332357067] [2024-06-21 21:39:44,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332357067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:44,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:44,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:39:44,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211464576] [2024-06-21 21:39:44,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:44,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:39:44,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:44,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:39:44,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:39:44,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:44,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 59 transitions, 497 flow. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 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) [2024-06-21 21:39:44,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:44,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:44,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:44,448 INFO L124 PetriNetUnfolderBase]: 138/302 cut-off events. [2024-06-21 21:39:44,448 INFO L125 PetriNetUnfolderBase]: For 6423/6423 co-relation queries the response was YES. [2024-06-21 21:39:44,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1329 conditions, 302 events. 138/302 cut-off events. For 6423/6423 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1211 event pairs, 37 based on Foata normal form. 6/307 useless extension candidates. Maximal degree in co-relation 1294. Up to 199 conditions per place. [2024-06-21 21:39:44,449 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 33 selfloop transitions, 15 changer transitions 23/73 dead transitions. [2024-06-21 21:39:44,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 73 transitions, 672 flow [2024-06-21 21:39:44,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:39:44,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:39:44,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 97 transitions. [2024-06-21 21:39:44,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33448275862068966 [2024-06-21 21:39:44,450 INFO L175 Difference]: Start difference. First operand has 116 places, 59 transitions, 497 flow. Second operand 10 states and 97 transitions. [2024-06-21 21:39:44,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 73 transitions, 672 flow [2024-06-21 21:39:44,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 73 transitions, 596 flow, removed 3 selfloop flow, removed 13 redundant places. [2024-06-21 21:39:44,457 INFO L231 Difference]: Finished difference. Result has 106 places, 48 transitions, 369 flow [2024-06-21 21:39:44,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=369, PETRI_PLACES=106, PETRI_TRANSITIONS=48} [2024-06-21 21:39:44,457 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 78 predicate places. [2024-06-21 21:39:44,457 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 48 transitions, 369 flow [2024-06-21 21:39:44,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 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) [2024-06-21 21:39:44,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:44,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:44,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 21:39:44,458 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:44,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:44,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1469402290, now seen corresponding path program 5 times [2024-06-21 21:39:44,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:44,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391107978] [2024-06-21 21:39:44,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:44,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:44,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:45,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:45,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:45,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391107978] [2024-06-21 21:39:45,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391107978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:45,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:45,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:45,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004079626] [2024-06-21 21:39:45,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:45,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:45,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:45,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:45,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:45,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:45,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 48 transitions, 369 flow. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:45,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:45,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:45,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:45,244 INFO L124 PetriNetUnfolderBase]: 119/254 cut-off events. [2024-06-21 21:39:45,244 INFO L125 PetriNetUnfolderBase]: For 5326/5326 co-relation queries the response was YES. [2024-06-21 21:39:45,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1093 conditions, 254 events. 119/254 cut-off events. For 5326/5326 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 953 event pairs, 30 based on Foata normal form. 6/260 useless extension candidates. Maximal degree in co-relation 1060. Up to 191 conditions per place. [2024-06-21 21:39:45,245 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 37 selfloop transitions, 7 changer transitions 14/60 dead transitions. [2024-06-21 21:39:45,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 60 transitions, 511 flow [2024-06-21 21:39:45,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:39:45,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:39:45,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 87 transitions. [2024-06-21 21:39:45,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3 [2024-06-21 21:39:45,246 INFO L175 Difference]: Start difference. First operand has 106 places, 48 transitions, 369 flow. Second operand 10 states and 87 transitions. [2024-06-21 21:39:45,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 60 transitions, 511 flow [2024-06-21 21:39:45,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 60 transitions, 435 flow, removed 4 selfloop flow, removed 16 redundant places. [2024-06-21 21:39:45,251 INFO L231 Difference]: Finished difference. Result has 86 places, 44 transitions, 290 flow [2024-06-21 21:39:45,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=290, PETRI_PLACES=86, PETRI_TRANSITIONS=44} [2024-06-21 21:39:45,252 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 58 predicate places. [2024-06-21 21:39:45,252 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 44 transitions, 290 flow [2024-06-21 21:39:45,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:45,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:45,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:45,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 21:39:45,253 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:45,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:45,253 INFO L85 PathProgramCache]: Analyzing trace with hash 2046535546, now seen corresponding path program 6 times [2024-06-21 21:39:45,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:45,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908112852] [2024-06-21 21:39:45,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:45,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:45,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:46,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:46,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:46,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908112852] [2024-06-21 21:39:46,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908112852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:46,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:46,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:39:46,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920960657] [2024-06-21 21:39:46,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:46,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:39:46,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:46,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:39:46,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:39:46,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:46,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 44 transitions, 290 flow. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 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) [2024-06-21 21:39:46,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:46,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:46,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:46,275 INFO L124 PetriNetUnfolderBase]: 105/228 cut-off events. [2024-06-21 21:39:46,275 INFO L125 PetriNetUnfolderBase]: For 4037/4037 co-relation queries the response was YES. [2024-06-21 21:39:46,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 941 conditions, 228 events. 105/228 cut-off events. For 4037/4037 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 815 event pairs, 33 based on Foata normal form. 6/234 useless extension candidates. Maximal degree in co-relation 911. Up to 135 conditions per place. [2024-06-21 21:39:46,276 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 25 selfloop transitions, 16 changer transitions 12/55 dead transitions. [2024-06-21 21:39:46,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 55 transitions, 421 flow [2024-06-21 21:39:46,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:39:46,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:39:46,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 83 transitions. [2024-06-21 21:39:46,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31800766283524906 [2024-06-21 21:39:46,277 INFO L175 Difference]: Start difference. First operand has 86 places, 44 transitions, 290 flow. Second operand 9 states and 83 transitions. [2024-06-21 21:39:46,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 55 transitions, 421 flow [2024-06-21 21:39:46,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 55 transitions, 399 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 21:39:46,281 INFO L231 Difference]: Finished difference. Result has 79 places, 40 transitions, 279 flow [2024-06-21 21:39:46,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=279, PETRI_PLACES=79, PETRI_TRANSITIONS=40} [2024-06-21 21:39:46,281 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 51 predicate places. [2024-06-21 21:39:46,281 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 40 transitions, 279 flow [2024-06-21 21:39:46,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 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) [2024-06-21 21:39:46,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:46,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:46,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 21:39:46,281 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:46,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:46,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1532834730, now seen corresponding path program 7 times [2024-06-21 21:39:46,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:46,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324581208] [2024-06-21 21:39:46,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:46,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:46,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:47,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:47,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:47,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324581208] [2024-06-21 21:39:47,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324581208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:47,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:47,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:39:47,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772357417] [2024-06-21 21:39:47,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:47,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:39:47,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:47,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:39:47,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:39:47,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:47,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 40 transitions, 279 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:47,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:47,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:47,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:47,306 INFO L124 PetriNetUnfolderBase]: 81/176 cut-off events. [2024-06-21 21:39:47,306 INFO L125 PetriNetUnfolderBase]: For 2054/2054 co-relation queries the response was YES. [2024-06-21 21:39:47,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 681 conditions, 176 events. 81/176 cut-off events. For 2054/2054 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 559 event pairs, 17 based on Foata normal form. 6/182 useless extension candidates. Maximal degree in co-relation 654. Up to 80 conditions per place. [2024-06-21 21:39:47,307 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 20 selfloop transitions, 10 changer transitions 18/50 dead transitions. [2024-06-21 21:39:47,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 50 transitions, 397 flow [2024-06-21 21:39:47,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:39:47,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:39:47,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 85 transitions. [2024-06-21 21:39:47,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29310344827586204 [2024-06-21 21:39:47,308 INFO L175 Difference]: Start difference. First operand has 79 places, 40 transitions, 279 flow. Second operand 10 states and 85 transitions. [2024-06-21 21:39:47,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 50 transitions, 397 flow [2024-06-21 21:39:47,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 50 transitions, 357 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 21:39:47,310 INFO L231 Difference]: Finished difference. Result has 74 places, 29 transitions, 180 flow [2024-06-21 21:39:47,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=180, PETRI_PLACES=74, PETRI_TRANSITIONS=29} [2024-06-21 21:39:47,310 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 46 predicate places. [2024-06-21 21:39:47,310 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 29 transitions, 180 flow [2024-06-21 21:39:47,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:47,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:47,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:47,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 21:39:47,311 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:47,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:47,311 INFO L85 PathProgramCache]: Analyzing trace with hash 962366376, now seen corresponding path program 8 times [2024-06-21 21:39:47,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:47,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926101470] [2024-06-21 21:39:47,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:47,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:47,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:48,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:48,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:48,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926101470] [2024-06-21 21:39:48,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926101470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:48,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:48,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:39:48,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417328627] [2024-06-21 21:39:48,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:48,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:39:48,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:48,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:39:48,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:39:48,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:48,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 29 transitions, 180 flow. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 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) [2024-06-21 21:39:48,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:48,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:48,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:48,343 INFO L124 PetriNetUnfolderBase]: 58/135 cut-off events. [2024-06-21 21:39:48,343 INFO L125 PetriNetUnfolderBase]: For 1431/1431 co-relation queries the response was YES. [2024-06-21 21:39:48,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 493 conditions, 135 events. 58/135 cut-off events. For 1431/1431 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 377 event pairs, 18 based on Foata normal form. 6/141 useless extension candidates. Maximal degree in co-relation 469. Up to 62 conditions per place. [2024-06-21 21:39:48,344 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 18 selfloop transitions, 6 changer transitions 15/41 dead transitions. [2024-06-21 21:39:48,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 41 transitions, 286 flow [2024-06-21 21:39:48,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:39:48,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:39:48,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 81 transitions. [2024-06-21 21:39:48,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3103448275862069 [2024-06-21 21:39:48,345 INFO L175 Difference]: Start difference. First operand has 74 places, 29 transitions, 180 flow. Second operand 9 states and 81 transitions. [2024-06-21 21:39:48,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 41 transitions, 286 flow [2024-06-21 21:39:48,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 41 transitions, 250 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-21 21:39:48,346 INFO L231 Difference]: Finished difference. Result has 60 places, 24 transitions, 134 flow [2024-06-21 21:39:48,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=134, PETRI_PLACES=60, PETRI_TRANSITIONS=24} [2024-06-21 21:39:48,346 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 32 predicate places. [2024-06-21 21:39:48,346 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 24 transitions, 134 flow [2024-06-21 21:39:48,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 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) [2024-06-21 21:39:48,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:48,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:48,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 21:39:48,347 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:39:48,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:48,348 INFO L85 PathProgramCache]: Analyzing trace with hash 2093617478, now seen corresponding path program 9 times [2024-06-21 21:39:48,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:48,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596732513] [2024-06-21 21:39:48,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:48,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:48,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:48,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:48,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:48,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596732513] [2024-06-21 21:39:48,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596732513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:48,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:48,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:48,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813362871] [2024-06-21 21:39:48,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:48,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:48,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:48,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:48,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:49,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-06-21 21:39:49,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 24 transitions, 134 flow. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:49,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:49,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-06-21 21:39:49,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:49,115 INFO L124 PetriNetUnfolderBase]: 30/75 cut-off events. [2024-06-21 21:39:49,115 INFO L125 PetriNetUnfolderBase]: For 419/419 co-relation queries the response was YES. [2024-06-21 21:39:49,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 75 events. 30/75 cut-off events. For 419/419 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 137 event pairs, 3 based on Foata normal form. 6/81 useless extension candidates. Maximal degree in co-relation 220. Up to 24 conditions per place. [2024-06-21 21:39:49,115 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 0 selfloop transitions, 0 changer transitions 29/29 dead transitions. [2024-06-21 21:39:49,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 29 transitions, 176 flow [2024-06-21 21:39:49,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:39:49,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:39:49,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 65 transitions. [2024-06-21 21:39:49,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2801724137931034 [2024-06-21 21:39:49,116 INFO L175 Difference]: Start difference. First operand has 60 places, 24 transitions, 134 flow. Second operand 8 states and 65 transitions. [2024-06-21 21:39:49,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 29 transitions, 176 flow [2024-06-21 21:39:49,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 29 transitions, 142 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-06-21 21:39:49,117 INFO L231 Difference]: Finished difference. Result has 47 places, 0 transitions, 0 flow [2024-06-21 21:39:49,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=47, PETRI_TRANSITIONS=0} [2024-06-21 21:39:49,117 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 19 predicate places. [2024-06-21 21:39:49,117 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 0 transitions, 0 flow [2024-06-21 21:39:49,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 10 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:49,119 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-21 21:39:49,120 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-21 21:39:49,120 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-21 21:39:49,120 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-21 21:39:49,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 21:39:49,120 INFO L445 BasicCegarLoop]: Path program histogram: [10, 9, 8, 6, 6, 6, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:49,122 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-21 21:39:49,122 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-21 21:39:49,125 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-21 21:39:49,125 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-21 21:39:49,126 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.06 09:39:49 BasicIcfg [2024-06-21 21:39:49,126 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-21 21:39:49,126 INFO L158 Benchmark]: Toolchain (without parser) took 57960.99ms. Allocated memory was 140.5MB in the beginning and 574.6MB in the end (delta: 434.1MB). Free memory was 60.7MB in the beginning and 506.0MB in the end (delta: -445.3MB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 21:39:49,127 INFO L158 Benchmark]: Witness Parser took 0.16ms. Allocated memory is still 140.5MB. Free memory is still 113.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 21:39:49,127 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 140.5MB. Free memory is still 108.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 21:39:49,127 INFO L158 Benchmark]: CACSL2BoogieTranslator took 556.76ms. Allocated memory is still 140.5MB. Free memory was 60.7MB in the beginning and 85.4MB in the end (delta: -24.8MB). Peak memory consumption was 9.3MB. Max. memory is 16.1GB. [2024-06-21 21:39:49,127 INFO L158 Benchmark]: Boogie Procedure Inliner took 62.10ms. Allocated memory is still 140.5MB. Free memory was 85.4MB in the beginning and 82.7MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 21:39:49,127 INFO L158 Benchmark]: Boogie Preprocessor took 74.77ms. Allocated memory is still 140.5MB. Free memory was 82.7MB in the beginning and 111.4MB in the end (delta: -28.6MB). Peak memory consumption was 6.5MB. Max. memory is 16.1GB. [2024-06-21 21:39:49,128 INFO L158 Benchmark]: RCFGBuilder took 582.85ms. Allocated memory is still 140.5MB. Free memory was 111.4MB in the beginning and 62.8MB in the end (delta: 48.6MB). Peak memory consumption was 48.2MB. Max. memory is 16.1GB. [2024-06-21 21:39:49,128 INFO L158 Benchmark]: TraceAbstraction took 56679.13ms. Allocated memory was 140.5MB in the beginning and 574.6MB in the end (delta: 434.1MB). Free memory was 61.9MB in the beginning and 506.0MB in the end (delta: -444.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 21:39:49,129 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.16ms. Allocated memory is still 140.5MB. Free memory is still 113.4MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.14ms. Allocated memory is still 140.5MB. Free memory is still 108.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 556.76ms. Allocated memory is still 140.5MB. Free memory was 60.7MB in the beginning and 85.4MB in the end (delta: -24.8MB). Peak memory consumption was 9.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 62.10ms. Allocated memory is still 140.5MB. Free memory was 85.4MB in the beginning and 82.7MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 74.77ms. Allocated memory is still 140.5MB. Free memory was 82.7MB in the beginning and 111.4MB in the end (delta: -28.6MB). Peak memory consumption was 6.5MB. Max. memory is 16.1GB. * RCFGBuilder took 582.85ms. Allocated memory is still 140.5MB. Free memory was 111.4MB in the beginning and 62.8MB in the end (delta: 48.6MB). Peak memory consumption was 48.2MB. Max. memory is 16.1GB. * TraceAbstraction took 56679.13ms. Allocated memory was 140.5MB in the beginning and 574.6MB in the end (delta: 434.1MB). Free memory was 61.9MB in the beginning and 506.0MB in the end (delta: -444.1MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 795]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 796]: 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, 46 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: 56.6s, OverallIterations: 68, TraceHistogramMax: 1, PathProgramHistogramMax: 10, EmptinessCheckTime: 0.0s, AutomataDifference: 18.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3356 SdHoareTripleChecker+Valid, 10.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2906 mSDsluCounter, 2068 SdHoareTripleChecker+Invalid, 8.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1720 mSDsCounter, 711 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 17145 IncrementalHoareTripleChecker+Invalid, 17856 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 711 mSolverCounterUnsat, 348 mSDtfsCounter, 17145 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 643 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 639 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 16.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1709occurred in iteration=36, InterpolantAutomatonStates: 565, 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, 0.3s SatisfiabilityAnalysisTime, 36.8s InterpolantComputationTime, 989 NumberOfCodeBlocks, 989 NumberOfCodeBlocksAsserted, 68 NumberOfCheckSat, 921 ConstructedInterpolants, 0 QuantifiedInterpolants, 40981 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 68 InterpolantComputations, 68 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-21 21:39:49,155 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