./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix022_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix022_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix022_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix022_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 16:02:39,599 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 16:02:39,638 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 16:02:39,643 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 16:02:39,644 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 16:02:39,662 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 16:02:39,662 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 16:02:39,662 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 16:02:39,663 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 16:02:39,666 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 16:02:39,666 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 16:02:39,666 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 16:02:39,667 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 16:02:39,668 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 16:02:39,668 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 16:02:39,668 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 16:02:39,668 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 16:02:39,668 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 16:02:39,669 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 16:02:39,669 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 16:02:39,669 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 16:02:39,669 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 16:02:39,669 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 16:02:39,669 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 16:02:39,669 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 16:02:39,670 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 16:02:39,670 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 16:02:39,670 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 16:02:39,671 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 16:02:39,671 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 16:02:39,671 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 16:02:39,672 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 16:02:39,672 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:02:39,672 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 16:02:39,672 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 16:02:39,672 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 16:02:39,672 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 16:02:39,672 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 16:02:39,672 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 16:02:39,672 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 16:02:39,672 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 16:02:39,673 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 16:02:39,673 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 16:02:39,673 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 16:02:39,855 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 16:02:39,873 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 16:02:39,874 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 16:02:39,875 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 16:02:39,876 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 16:02:39,877 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix022_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-20 16:02:40,888 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 16:02:41,072 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 16:02:41,073 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix022_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-20 16:02:41,092 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b42580e3/1367dff1d1d245e29ded7d16f1926253/FLAG208b37d1e [2024-06-20 16:02:41,102 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b42580e3/1367dff1d1d245e29ded7d16f1926253 [2024-06-20 16:02:41,104 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 16:02:41,105 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 16:02:41,105 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix022_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml [2024-06-20 16:02:41,275 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 16:02:41,276 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 16:02:41,277 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 16:02:41,277 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 16:02:41,281 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 16:02:41,282 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:02:41" (1/2) ... [2024-06-20 16:02:41,283 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fee0bc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:02:41, skipping insertion in model container [2024-06-20 16:02:41,283 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:02:41" (1/2) ... [2024-06-20 16:02:41,284 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@462ba2de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:02:41, skipping insertion in model container [2024-06-20 16:02:41,284 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:02:41" (2/2) ... [2024-06-20 16:02:41,285 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fee0bc5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:02:41, skipping insertion in model container [2024-06-20 16:02:41,285 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:02:41" (2/2) ... [2024-06-20 16:02:41,286 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 16:02:41,334 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 16:02:41,335 INFO L97 edCorrectnessWitness]: Location invariant before [L814-L814] ((((((((((((((! multithreaded || y$r_buff1_thd2 == (_Bool)0) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$flush_delayed == (_Bool)0) [2024-06-20 16:02:41,335 INFO L97 edCorrectnessWitness]: Location invariant before [L813-L813] ((((((((((((((! multithreaded || y$r_buff1_thd2 == (_Bool)0) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$flush_delayed == (_Bool)0) [2024-06-20 16:02:41,336 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 16:02:41,336 INFO L106 edCorrectnessWitness]: ghost_update [L811-L811] multithreaded = 1; [2024-06-20 16:02:41,371 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 16:02:41,628 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:02:41,635 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 16:02:41,751 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:02:41,787 INFO L206 MainTranslator]: Completed translation [2024-06-20 16:02:41,788 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:02:41 WrapperNode [2024-06-20 16:02:41,788 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 16:02:41,789 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 16:02:41,789 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 16:02:41,789 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 16:02:41,794 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:02:41" (1/1) ... [2024-06-20 16:02:41,817 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:02:41" (1/1) ... [2024-06-20 16:02:41,844 INFO L138 Inliner]: procedures = 174, calls = 36, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 113 [2024-06-20 16:02:41,845 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 16:02:41,846 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 16:02:41,846 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 16:02:41,846 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 16:02:41,855 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:02:41" (1/1) ... [2024-06-20 16:02:41,855 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:02:41" (1/1) ... [2024-06-20 16:02:41,864 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:02:41" (1/1) ... [2024-06-20 16:02:41,877 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]. [2024-06-20 16:02:41,878 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:02:41" (1/1) ... [2024-06-20 16:02:41,878 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:02:41" (1/1) ... [2024-06-20 16:02:41,883 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:02:41" (1/1) ... [2024-06-20 16:02:41,885 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:02:41" (1/1) ... [2024-06-20 16:02:41,886 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:02:41" (1/1) ... [2024-06-20 16:02:41,887 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:02:41" (1/1) ... [2024-06-20 16:02:41,889 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 16:02:41,890 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 16:02:41,890 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 16:02:41,890 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 16:02:41,891 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:02:41" (1/1) ... [2024-06-20 16:02:41,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:02:41,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 16:02:41,918 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) [2024-06-20 16:02:41,933 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 [2024-06-20 16:02:41,948 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 16:02:41,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 16:02:41,948 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 16:02:41,949 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 16:02:41,949 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 16:02:41,949 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 16:02:41,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 16:02:41,949 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 16:02:41,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 16:02:41,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 16:02:41,951 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 16:02:42,078 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 16:02:42,080 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 16:02:42,409 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 16:02:42,409 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 16:02:42,578 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 16:02:42,578 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 16:02:42,580 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:02:42 BoogieIcfgContainer [2024-06-20 16:02:42,580 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 16:02:42,582 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 16:02:42,582 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 16:02:42,585 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 16:02:42,585 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 04:02:41" (1/4) ... [2024-06-20 16:02:42,586 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@561cdd04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:02:42, skipping insertion in model container [2024-06-20 16:02:42,586 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:02:41" (2/4) ... [2024-06-20 16:02:42,586 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@561cdd04 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:02:42, skipping insertion in model container [2024-06-20 16:02:42,586 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:02:41" (3/4) ... [2024-06-20 16:02:42,590 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@561cdd04 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:02:42, skipping insertion in model container [2024-06-20 16:02:42,590 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:02:42" (4/4) ... [2024-06-20 16:02:42,591 INFO L112 eAbstractionObserver]: Analyzing ICFG mix022_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-20 16:02:42,605 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 16:02:42,605 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-20 16:02:42,605 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 16:02:42,633 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 16:02:42,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 30 transitions, 68 flow [2024-06-20 16:02:42,671 INFO L124 PetriNetUnfolderBase]: 0/28 cut-off events. [2024-06-20 16:02:42,671 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:02:42,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 28 events. 0/28 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 40 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 16:02:42,674 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 30 transitions, 68 flow [2024-06-20 16:02:42,676 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 22 transitions, 50 flow [2024-06-20 16:02:42,682 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 16:02:42,686 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;@4232bc6d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 16:02:42,687 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-20 16:02:42,689 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 16:02:42,689 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 16:02:42,689 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:02:42,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:42,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 16:02:42,690 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)] === [2024-06-20 16:02:42,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:42,693 INFO L85 PathProgramCache]: Analyzing trace with hash 325944614, now seen corresponding path program 1 times [2024-06-20 16:02:42,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:42,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514049416] [2024-06-20 16:02:42,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:42,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:42,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:43,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:43,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:43,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514049416] [2024-06-20 16:02:43,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514049416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:43,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:43,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 16:02:43,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898242245] [2024-06-20 16:02:43,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:43,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 16:02:43,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:43,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 16:02:43,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 16:02:43,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 30 [2024-06-20 16:02:43,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:43,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:43,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 30 [2024-06-20 16:02:43,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:43,621 INFO L124 PetriNetUnfolderBase]: 162/306 cut-off events. [2024-06-20 16:02:43,622 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-06-20 16:02:43,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 617 conditions, 306 events. 162/306 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1107 event pairs, 97 based on Foata normal form. 1/301 useless extension candidates. Maximal degree in co-relation 606. Up to 288 conditions per place. [2024-06-20 16:02:43,627 INFO L140 encePairwiseOnDemand]: 25/30 looper letters, 21 selfloop transitions, 3 changer transitions 0/28 dead transitions. [2024-06-20 16:02:43,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 28 transitions, 113 flow [2024-06-20 16:02:43,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 16:02:43,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 16:02:43,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2024-06-20 16:02:43,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888888888888889 [2024-06-20 16:02:43,638 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 50 flow. Second operand 3 states and 53 transitions. [2024-06-20 16:02:43,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 28 transitions, 113 flow [2024-06-20 16:02:43,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 28 transitions, 110 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-20 16:02:43,642 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 69 flow [2024-06-20 16:02:43,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2024-06-20 16:02:43,647 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2024-06-20 16:02:43,647 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 69 flow [2024-06-20 16:02:43,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:43,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:43,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:43,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 16:02:43,648 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)] === [2024-06-20 16:02:43,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:43,648 INFO L85 PathProgramCache]: Analyzing trace with hash -299804411, now seen corresponding path program 1 times [2024-06-20 16:02:43,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:43,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573656216] [2024-06-20 16:02:43,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:43,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:43,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:44,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:44,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:44,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573656216] [2024-06-20 16:02:44,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573656216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:44,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:44,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 16:02:44,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049281105] [2024-06-20 16:02:44,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:44,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 16:02:44,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:44,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 16:02:44,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-20 16:02:44,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 30 [2024-06-20 16:02:44,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 69 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 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) [2024-06-20 16:02:44,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:44,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 30 [2024-06-20 16:02:44,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:44,183 INFO L124 PetriNetUnfolderBase]: 159/303 cut-off events. [2024-06-20 16:02:44,184 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2024-06-20 16:02:44,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 691 conditions, 303 events. 159/303 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1097 event pairs, 79 based on Foata normal form. 2/304 useless extension candidates. Maximal degree in co-relation 679. Up to 274 conditions per place. [2024-06-20 16:02:44,187 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 25 selfloop transitions, 5 changer transitions 0/34 dead transitions. [2024-06-20 16:02:44,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 34 transitions, 155 flow [2024-06-20 16:02:44,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 16:02:44,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 16:02:44,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 68 transitions. [2024-06-20 16:02:44,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-20 16:02:44,191 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 69 flow. Second operand 4 states and 68 transitions. [2024-06-20 16:02:44,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 34 transitions, 155 flow [2024-06-20 16:02:44,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 34 transitions, 152 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 16:02:44,195 INFO L231 Difference]: Finished difference. Result has 33 places, 26 transitions, 93 flow [2024-06-20 16:02:44,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=93, PETRI_PLACES=33, PETRI_TRANSITIONS=26} [2024-06-20 16:02:44,197 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 4 predicate places. [2024-06-20 16:02:44,197 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 26 transitions, 93 flow [2024-06-20 16:02:44,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 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) [2024-06-20 16:02:44,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:44,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:44,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 16:02:44,199 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)] === [2024-06-20 16:02:44,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:44,201 INFO L85 PathProgramCache]: Analyzing trace with hash -704001021, now seen corresponding path program 1 times [2024-06-20 16:02:44,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:44,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457734543] [2024-06-20 16:02:44,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:44,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:44,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:44,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:44,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:44,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457734543] [2024-06-20 16:02:44,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457734543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:44,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:44,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 16:02:44,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626548218] [2024-06-20 16:02:44,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:44,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 16:02:44,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:44,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 16:02:44,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-20 16:02:44,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-06-20 16:02:44,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 93 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:44,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:44,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-06-20 16:02:44,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:44,767 INFO L124 PetriNetUnfolderBase]: 187/338 cut-off events. [2024-06-20 16:02:44,767 INFO L125 PetriNetUnfolderBase]: For 197/197 co-relation queries the response was YES. [2024-06-20 16:02:44,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 866 conditions, 338 events. 187/338 cut-off events. For 197/197 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1201 event pairs, 67 based on Foata normal form. 3/340 useless extension candidates. Maximal degree in co-relation 852. Up to 293 conditions per place. [2024-06-20 16:02:44,771 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 34 selfloop transitions, 11 changer transitions 0/48 dead transitions. [2024-06-20 16:02:44,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 48 transitions, 249 flow [2024-06-20 16:02:44,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:02:44,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:02:44,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-06-20 16:02:44,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-20 16:02:44,775 INFO L175 Difference]: Start difference. First operand has 33 places, 26 transitions, 93 flow. Second operand 5 states and 85 transitions. [2024-06-20 16:02:44,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 48 transitions, 249 flow [2024-06-20 16:02:44,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 48 transitions, 240 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-20 16:02:44,777 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 160 flow [2024-06-20 16:02:44,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=160, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2024-06-20 16:02:44,778 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 9 predicate places. [2024-06-20 16:02:44,778 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 160 flow [2024-06-20 16:02:44,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:44,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:44,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:44,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 16:02:44,778 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)] === [2024-06-20 16:02:44,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:44,779 INFO L85 PathProgramCache]: Analyzing trace with hash -210665862, now seen corresponding path program 1 times [2024-06-20 16:02:44,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:44,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276932159] [2024-06-20 16:02:44,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:44,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:44,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:45,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:45,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:45,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276932159] [2024-06-20 16:02:45,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276932159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:45,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:45,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:02:45,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735181214] [2024-06-20 16:02:45,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:45,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:02:45,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:45,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:02:45,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:02:45,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-06-20 16:02:45,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 160 flow. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:45,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:45,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-06-20 16:02:45,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:45,636 INFO L124 PetriNetUnfolderBase]: 188/340 cut-off events. [2024-06-20 16:02:45,637 INFO L125 PetriNetUnfolderBase]: For 417/417 co-relation queries the response was YES. [2024-06-20 16:02:45,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1043 conditions, 340 events. 188/340 cut-off events. For 417/417 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1187 event pairs, 46 based on Foata normal form. 3/342 useless extension candidates. Maximal degree in co-relation 1026. Up to 282 conditions per place. [2024-06-20 16:02:45,639 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 38 selfloop transitions, 14 changer transitions 0/55 dead transitions. [2024-06-20 16:02:45,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 55 transitions, 334 flow [2024-06-20 16:02:45,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:02:45,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:02:45,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-20 16:02:45,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-20 16:02:45,641 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 160 flow. Second operand 6 states and 100 transitions. [2024-06-20 16:02:45,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 55 transitions, 334 flow [2024-06-20 16:02:45,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 55 transitions, 330 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-20 16:02:45,643 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 212 flow [2024-06-20 16:02:45,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=212, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-20 16:02:45,644 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 15 predicate places. [2024-06-20 16:02:45,644 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 212 flow [2024-06-20 16:02:45,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:45,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:45,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:45,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 16:02:45,645 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)] === [2024-06-20 16:02:45,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:45,646 INFO L85 PathProgramCache]: Analyzing trace with hash 2059888706, now seen corresponding path program 1 times [2024-06-20 16:02:45,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:45,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359158952] [2024-06-20 16:02:45,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:45,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:45,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:46,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:46,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:46,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359158952] [2024-06-20 16:02:46,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359158952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:46,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:46,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:02:46,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371849839] [2024-06-20 16:02:46,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:46,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:02:46,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:46,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:02:46,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:02:46,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-06-20 16:02:46,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 212 flow. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 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) [2024-06-20 16:02:46,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:46,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-06-20 16:02:46,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:46,490 INFO L124 PetriNetUnfolderBase]: 189/343 cut-off events. [2024-06-20 16:02:46,491 INFO L125 PetriNetUnfolderBase]: For 640/640 co-relation queries the response was YES. [2024-06-20 16:02:46,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1176 conditions, 343 events. 189/343 cut-off events. For 640/640 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1206 event pairs, 24 based on Foata normal form. 6/348 useless extension candidates. Maximal degree in co-relation 1156. Up to 259 conditions per place. [2024-06-20 16:02:46,493 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 38 selfloop transitions, 16 changer transitions 0/57 dead transitions. [2024-06-20 16:02:46,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 57 transitions, 380 flow [2024-06-20 16:02:46,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:02:46,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:02:46,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-20 16:02:46,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-20 16:02:46,495 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 212 flow. Second operand 7 states and 110 transitions. [2024-06-20 16:02:46,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 57 transitions, 380 flow [2024-06-20 16:02:46,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 57 transitions, 348 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-20 16:02:46,497 INFO L231 Difference]: Finished difference. Result has 46 places, 37 transitions, 215 flow [2024-06-20 16:02:46,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=215, PETRI_PLACES=46, PETRI_TRANSITIONS=37} [2024-06-20 16:02:46,498 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 17 predicate places. [2024-06-20 16:02:46,498 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 37 transitions, 215 flow [2024-06-20 16:02:46,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 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) [2024-06-20 16:02:46,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:46,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:46,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 16:02:46,499 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)] === [2024-06-20 16:02:46,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:46,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1384917533, now seen corresponding path program 1 times [2024-06-20 16:02:46,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:46,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254792608] [2024-06-20 16:02:46,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:46,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:46,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:46,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:46,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:46,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254792608] [2024-06-20 16:02:46,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254792608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:46,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:46,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:02:46,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141400039] [2024-06-20 16:02:46,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:46,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:02:46,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:46,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:02:46,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:02:46,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:02:46,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 37 transitions, 215 flow. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:46,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:46,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:02:46,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:47,080 INFO L124 PetriNetUnfolderBase]: 187/340 cut-off events. [2024-06-20 16:02:47,081 INFO L125 PetriNetUnfolderBase]: For 747/747 co-relation queries the response was YES. [2024-06-20 16:02:47,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1224 conditions, 340 events. 187/340 cut-off events. For 747/747 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1200 event pairs, 47 based on Foata normal form. 1/340 useless extension candidates. Maximal degree in co-relation 1202. Up to 329 conditions per place. [2024-06-20 16:02:47,083 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 34 selfloop transitions, 6 changer transitions 0/42 dead transitions. [2024-06-20 16:02:47,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 42 transitions, 307 flow [2024-06-20 16:02:47,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:02:47,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:02:47,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 59 transitions. [2024-06-20 16:02:47,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3933333333333333 [2024-06-20 16:02:47,084 INFO L175 Difference]: Start difference. First operand has 46 places, 37 transitions, 215 flow. Second operand 5 states and 59 transitions. [2024-06-20 16:02:47,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 42 transitions, 307 flow [2024-06-20 16:02:47,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 42 transitions, 266 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-20 16:02:47,086 INFO L231 Difference]: Finished difference. Result has 46 places, 37 transitions, 191 flow [2024-06-20 16:02:47,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=191, PETRI_PLACES=46, PETRI_TRANSITIONS=37} [2024-06-20 16:02:47,087 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 17 predicate places. [2024-06-20 16:02:47,087 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 37 transitions, 191 flow [2024-06-20 16:02:47,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:47,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:47,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:47,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 16:02:47,088 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)] === [2024-06-20 16:02:47,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:47,088 INFO L85 PathProgramCache]: Analyzing trace with hash -17632073, now seen corresponding path program 1 times [2024-06-20 16:02:47,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:47,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373300107] [2024-06-20 16:02:47,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:47,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:47,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:47,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:47,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:47,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373300107] [2024-06-20 16:02:47,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373300107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:47,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:47,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:02:47,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209420109] [2024-06-20 16:02:47,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:47,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:02:47,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:47,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:02:47,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:02:47,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:02:47,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 37 transitions, 191 flow. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:47,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:47,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:02:47,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:47,757 INFO L124 PetriNetUnfolderBase]: 181/331 cut-off events. [2024-06-20 16:02:47,757 INFO L125 PetriNetUnfolderBase]: For 877/877 co-relation queries the response was YES. [2024-06-20 16:02:47,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1152 conditions, 331 events. 181/331 cut-off events. For 877/877 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1146 event pairs, 44 based on Foata normal form. 3/333 useless extension candidates. Maximal degree in co-relation 1128. Up to 311 conditions per place. [2024-06-20 16:02:47,759 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 37 selfloop transitions, 8 changer transitions 0/47 dead transitions. [2024-06-20 16:02:47,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 47 transitions, 307 flow [2024-06-20 16:02:47,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:02:47,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:02:47,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 70 transitions. [2024-06-20 16:02:47,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-20 16:02:47,761 INFO L175 Difference]: Start difference. First operand has 46 places, 37 transitions, 191 flow. Second operand 6 states and 70 transitions. [2024-06-20 16:02:47,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 47 transitions, 307 flow [2024-06-20 16:02:47,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 47 transitions, 292 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-20 16:02:47,763 INFO L231 Difference]: Finished difference. Result has 48 places, 39 transitions, 209 flow [2024-06-20 16:02:47,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=209, PETRI_PLACES=48, PETRI_TRANSITIONS=39} [2024-06-20 16:02:47,764 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 19 predicate places. [2024-06-20 16:02:47,764 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 39 transitions, 209 flow [2024-06-20 16:02:47,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:47,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:47,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:47,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 16:02:47,765 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)] === [2024-06-20 16:02:47,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:47,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1376822006, now seen corresponding path program 1 times [2024-06-20 16:02:47,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:47,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742040137] [2024-06-20 16:02:47,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:47,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:47,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:48,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:48,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:48,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742040137] [2024-06-20 16:02:48,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742040137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:48,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:48,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:02:48,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300226229] [2024-06-20 16:02:48,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:48,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:02:48,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:48,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:02:48,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:02:48,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:02:48,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 39 transitions, 209 flow. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:48,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:48,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:02:48,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:48,377 INFO L124 PetriNetUnfolderBase]: 182/333 cut-off events. [2024-06-20 16:02:48,377 INFO L125 PetriNetUnfolderBase]: For 1009/1009 co-relation queries the response was YES. [2024-06-20 16:02:48,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1224 conditions, 333 events. 182/333 cut-off events. For 1009/1009 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1146 event pairs, 43 based on Foata normal form. 2/334 useless extension candidates. Maximal degree in co-relation 1200. Up to 288 conditions per place. [2024-06-20 16:02:48,380 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 36 selfloop transitions, 13 changer transitions 0/51 dead transitions. [2024-06-20 16:02:48,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 51 transitions, 358 flow [2024-06-20 16:02:48,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:02:48,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:02:48,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 76 transitions. [2024-06-20 16:02:48,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-06-20 16:02:48,382 INFO L175 Difference]: Start difference. First operand has 48 places, 39 transitions, 209 flow. Second operand 6 states and 76 transitions. [2024-06-20 16:02:48,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 51 transitions, 358 flow [2024-06-20 16:02:48,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 51 transitions, 341 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-20 16:02:48,385 INFO L231 Difference]: Finished difference. Result has 50 places, 41 transitions, 240 flow [2024-06-20 16:02:48,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=240, PETRI_PLACES=50, PETRI_TRANSITIONS=41} [2024-06-20 16:02:48,389 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 21 predicate places. [2024-06-20 16:02:48,389 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 41 transitions, 240 flow [2024-06-20 16:02:48,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:48,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:48,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:48,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 16:02:48,390 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)] === [2024-06-20 16:02:48,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:48,391 INFO L85 PathProgramCache]: Analyzing trace with hash -534088964, now seen corresponding path program 2 times [2024-06-20 16:02:48,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:48,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42696846] [2024-06-20 16:02:48,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:48,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:48,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:48,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:48,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:48,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42696846] [2024-06-20 16:02:48,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42696846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:48,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:48,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:02:48,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348391883] [2024-06-20 16:02:48,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:48,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:02:48,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:48,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:02:48,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:02:48,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:02:48,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 41 transitions, 240 flow. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:48,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:48,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:02:48,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:49,040 INFO L124 PetriNetUnfolderBase]: 177/323 cut-off events. [2024-06-20 16:02:49,040 INFO L125 PetriNetUnfolderBase]: For 1164/1164 co-relation queries the response was YES. [2024-06-20 16:02:49,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1226 conditions, 323 events. 177/323 cut-off events. For 1164/1164 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1094 event pairs, 42 based on Foata normal form. 1/323 useless extension candidates. Maximal degree in co-relation 1201. Up to 309 conditions per place. [2024-06-20 16:02:49,042 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 37 selfloop transitions, 8 changer transitions 0/47 dead transitions. [2024-06-20 16:02:49,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 47 transitions, 344 flow [2024-06-20 16:02:49,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:02:49,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:02:49,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 68 transitions. [2024-06-20 16:02:49,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37777777777777777 [2024-06-20 16:02:49,043 INFO L175 Difference]: Start difference. First operand has 50 places, 41 transitions, 240 flow. Second operand 6 states and 68 transitions. [2024-06-20 16:02:49,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 47 transitions, 344 flow [2024-06-20 16:02:49,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 47 transitions, 329 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-20 16:02:49,046 INFO L231 Difference]: Finished difference. Result has 53 places, 41 transitions, 246 flow [2024-06-20 16:02:49,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=246, PETRI_PLACES=53, PETRI_TRANSITIONS=41} [2024-06-20 16:02:49,046 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 24 predicate places. [2024-06-20 16:02:49,046 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 41 transitions, 246 flow [2024-06-20 16:02:49,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:49,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:49,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:49,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 16:02:49,047 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)] === [2024-06-20 16:02:49,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:49,047 INFO L85 PathProgramCache]: Analyzing trace with hash 268191758, now seen corresponding path program 1 times [2024-06-20 16:02:49,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:49,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808719134] [2024-06-20 16:02:49,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:49,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:49,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:49,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:49,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:49,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808719134] [2024-06-20 16:02:49,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808719134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:49,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:49,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:02:49,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437389767] [2024-06-20 16:02:49,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:49,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:02:49,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:49,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:02:49,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:02:49,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:02:49,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 41 transitions, 246 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:49,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:49,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:02:49,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:49,745 INFO L124 PetriNetUnfolderBase]: 215/385 cut-off events. [2024-06-20 16:02:49,745 INFO L125 PetriNetUnfolderBase]: For 1805/1805 co-relation queries the response was YES. [2024-06-20 16:02:49,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1461 conditions, 385 events. 215/385 cut-off events. For 1805/1805 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1393 event pairs, 48 based on Foata normal form. 6/390 useless extension candidates. Maximal degree in co-relation 1435. Up to 276 conditions per place. [2024-06-20 16:02:49,747 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 45 selfloop transitions, 17 changer transitions 0/64 dead transitions. [2024-06-20 16:02:49,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 64 transitions, 456 flow [2024-06-20 16:02:49,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:02:49,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:02:49,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 92 transitions. [2024-06-20 16:02:49,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-20 16:02:49,748 INFO L175 Difference]: Start difference. First operand has 53 places, 41 transitions, 246 flow. Second operand 7 states and 92 transitions. [2024-06-20 16:02:49,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 64 transitions, 456 flow [2024-06-20 16:02:49,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 64 transitions, 422 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 16:02:49,751 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 295 flow [2024-06-20 16:02:49,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=295, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2024-06-20 16:02:49,752 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 26 predicate places. [2024-06-20 16:02:49,752 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 295 flow [2024-06-20 16:02:49,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:49,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:49,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:49,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 16:02:49,753 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)] === [2024-06-20 16:02:49,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:49,753 INFO L85 PathProgramCache]: Analyzing trace with hash 623112284, now seen corresponding path program 2 times [2024-06-20 16:02:49,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:49,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405056775] [2024-06-20 16:02:49,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:49,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:49,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:50,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:50,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:50,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405056775] [2024-06-20 16:02:50,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405056775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:50,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:50,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:02:50,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309095421] [2024-06-20 16:02:50,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:50,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:02:50,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:50,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:02:50,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:02:50,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:02:50,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 295 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:50,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:50,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:02:50,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:50,441 INFO L124 PetriNetUnfolderBase]: 224/400 cut-off events. [2024-06-20 16:02:50,447 INFO L125 PetriNetUnfolderBase]: For 2141/2141 co-relation queries the response was YES. [2024-06-20 16:02:50,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1675 conditions, 400 events. 224/400 cut-off events. For 2141/2141 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1446 event pairs, 48 based on Foata normal form. 3/402 useless extension candidates. Maximal degree in co-relation 1647. Up to 360 conditions per place. [2024-06-20 16:02:50,449 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 49 selfloop transitions, 13 changer transitions 0/64 dead transitions. [2024-06-20 16:02:50,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 64 transitions, 497 flow [2024-06-20 16:02:50,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:02:50,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:02:50,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 84 transitions. [2024-06-20 16:02:50,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 16:02:50,452 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 295 flow. Second operand 7 states and 84 transitions. [2024-06-20 16:02:50,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 64 transitions, 497 flow [2024-06-20 16:02:50,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 64 transitions, 482 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-20 16:02:50,455 INFO L231 Difference]: Finished difference. Result has 60 places, 52 transitions, 343 flow [2024-06-20 16:02:50,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=343, PETRI_PLACES=60, PETRI_TRANSITIONS=52} [2024-06-20 16:02:50,456 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 31 predicate places. [2024-06-20 16:02:50,456 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 52 transitions, 343 flow [2024-06-20 16:02:50,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:50,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:50,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:50,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 16:02:50,457 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)] === [2024-06-20 16:02:50,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:50,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1955003612, now seen corresponding path program 3 times [2024-06-20 16:02:50,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:50,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274534348] [2024-06-20 16:02:50,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:50,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:50,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:50,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:50,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:50,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274534348] [2024-06-20 16:02:50,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274534348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:50,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:50,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:02:50,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701488544] [2024-06-20 16:02:50,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:50,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:02:50,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:50,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:02:50,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:02:50,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:02:50,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 52 transitions, 343 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:50,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:50,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:02:50,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:51,162 INFO L124 PetriNetUnfolderBase]: 218/391 cut-off events. [2024-06-20 16:02:51,162 INFO L125 PetriNetUnfolderBase]: For 2396/2396 co-relation queries the response was YES. [2024-06-20 16:02:51,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1679 conditions, 391 events. 218/391 cut-off events. For 2396/2396 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1413 event pairs, 50 based on Foata normal form. 3/393 useless extension candidates. Maximal degree in co-relation 1648. Up to 368 conditions per place. [2024-06-20 16:02:51,166 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 49 selfloop transitions, 10 changer transitions 0/61 dead transitions. [2024-06-20 16:02:51,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 61 transitions, 483 flow [2024-06-20 16:02:51,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:02:51,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:02:51,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 79 transitions. [2024-06-20 16:02:51,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3761904761904762 [2024-06-20 16:02:51,168 INFO L175 Difference]: Start difference. First operand has 60 places, 52 transitions, 343 flow. Second operand 7 states and 79 transitions. [2024-06-20 16:02:51,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 61 transitions, 483 flow [2024-06-20 16:02:51,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 61 transitions, 459 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-20 16:02:51,171 INFO L231 Difference]: Finished difference. Result has 64 places, 52 transitions, 344 flow [2024-06-20 16:02:51,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=344, PETRI_PLACES=64, PETRI_TRANSITIONS=52} [2024-06-20 16:02:51,172 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 35 predicate places. [2024-06-20 16:02:51,173 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 52 transitions, 344 flow [2024-06-20 16:02:51,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:51,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:51,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:51,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 16:02:51,173 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)] === [2024-06-20 16:02:51,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:51,174 INFO L85 PathProgramCache]: Analyzing trace with hash -279804311, now seen corresponding path program 1 times [2024-06-20 16:02:51,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:51,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052306566] [2024-06-20 16:02:51,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:51,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:51,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:51,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:51,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:51,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052306566] [2024-06-20 16:02:51,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052306566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:51,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:51,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:02:51,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765975745] [2024-06-20 16:02:51,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:51,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:02:51,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:51,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:02:51,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:02:51,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:02:51,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 52 transitions, 344 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:51,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:51,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:02:51,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:52,082 INFO L124 PetriNetUnfolderBase]: 216/388 cut-off events. [2024-06-20 16:02:52,083 INFO L125 PetriNetUnfolderBase]: For 2473/2473 co-relation queries the response was YES. [2024-06-20 16:02:52,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1686 conditions, 388 events. 216/388 cut-off events. For 2473/2473 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1401 event pairs, 50 based on Foata normal form. 1/388 useless extension candidates. Maximal degree in co-relation 1654. Up to 328 conditions per place. [2024-06-20 16:02:52,086 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 48 selfloop transitions, 18 changer transitions 0/68 dead transitions. [2024-06-20 16:02:52,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 68 transitions, 522 flow [2024-06-20 16:02:52,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:02:52,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:02:52,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 97 transitions. [2024-06-20 16:02:52,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4041666666666667 [2024-06-20 16:02:52,087 INFO L175 Difference]: Start difference. First operand has 64 places, 52 transitions, 344 flow. Second operand 8 states and 97 transitions. [2024-06-20 16:02:52,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 68 transitions, 522 flow [2024-06-20 16:02:52,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 68 transitions, 496 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-20 16:02:52,093 INFO L231 Difference]: Finished difference. Result has 66 places, 54 transitions, 376 flow [2024-06-20 16:02:52,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=376, PETRI_PLACES=66, PETRI_TRANSITIONS=54} [2024-06-20 16:02:52,094 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 37 predicate places. [2024-06-20 16:02:52,094 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 54 transitions, 376 flow [2024-06-20 16:02:52,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:52,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:52,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:52,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 16:02:52,095 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)] === [2024-06-20 16:02:52,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:52,095 INFO L85 PathProgramCache]: Analyzing trace with hash -275989296, now seen corresponding path program 1 times [2024-06-20 16:02:52,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:52,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805134677] [2024-06-20 16:02:52,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:52,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:52,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:52,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:52,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:52,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805134677] [2024-06-20 16:02:52,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805134677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:52,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:52,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:02:52,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339134848] [2024-06-20 16:02:52,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:52,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:02:52,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:52,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:02:52,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:02:52,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:02:52,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 54 transitions, 376 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:52,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:52,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:02:52,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:52,919 INFO L124 PetriNetUnfolderBase]: 225/403 cut-off events. [2024-06-20 16:02:52,919 INFO L125 PetriNetUnfolderBase]: For 3034/3034 co-relation queries the response was YES. [2024-06-20 16:02:52,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1808 conditions, 403 events. 225/403 cut-off events. For 3034/3034 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1472 event pairs, 47 based on Foata normal form. 3/405 useless extension candidates. Maximal degree in co-relation 1775. Up to 282 conditions per place. [2024-06-20 16:02:52,922 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 51 selfloop transitions, 21 changer transitions 0/74 dead transitions. [2024-06-20 16:02:52,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 74 transitions, 606 flow [2024-06-20 16:02:52,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:02:52,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:02:52,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 103 transitions. [2024-06-20 16:02:52,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42916666666666664 [2024-06-20 16:02:52,924 INFO L175 Difference]: Start difference. First operand has 66 places, 54 transitions, 376 flow. Second operand 8 states and 103 transitions. [2024-06-20 16:02:52,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 74 transitions, 606 flow [2024-06-20 16:02:52,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 74 transitions, 566 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 16:02:52,929 INFO L231 Difference]: Finished difference. Result has 68 places, 56 transitions, 397 flow [2024-06-20 16:02:52,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=397, PETRI_PLACES=68, PETRI_TRANSITIONS=56} [2024-06-20 16:02:52,929 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 39 predicate places. [2024-06-20 16:02:52,930 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 56 transitions, 397 flow [2024-06-20 16:02:52,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:52,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:52,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:52,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 16:02:52,930 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)] === [2024-06-20 16:02:52,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:52,931 INFO L85 PathProgramCache]: Analyzing trace with hash -275994876, now seen corresponding path program 2 times [2024-06-20 16:02:52,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:52,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003525616] [2024-06-20 16:02:52,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:52,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:52,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:53,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:53,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:53,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003525616] [2024-06-20 16:02:53,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003525616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:53,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:53,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:02:53,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093195661] [2024-06-20 16:02:53,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:53,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:02:53,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:53,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:02:53,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:02:53,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:02:53,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 56 transitions, 397 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:53,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:53,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:02:53,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:53,655 INFO L124 PetriNetUnfolderBase]: 234/418 cut-off events. [2024-06-20 16:02:53,655 INFO L125 PetriNetUnfolderBase]: For 3602/3602 co-relation queries the response was YES. [2024-06-20 16:02:53,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1924 conditions, 418 events. 234/418 cut-off events. For 3602/3602 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1551 event pairs, 45 based on Foata normal form. 3/420 useless extension candidates. Maximal degree in co-relation 1890. Up to 290 conditions per place. [2024-06-20 16:02:53,658 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 50 selfloop transitions, 26 changer transitions 0/78 dead transitions. [2024-06-20 16:02:53,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 78 transitions, 647 flow [2024-06-20 16:02:53,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:02:53,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:02:53,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 97 transitions. [2024-06-20 16:02:53,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-06-20 16:02:53,659 INFO L175 Difference]: Start difference. First operand has 68 places, 56 transitions, 397 flow. Second operand 7 states and 97 transitions. [2024-06-20 16:02:53,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 78 transitions, 647 flow [2024-06-20 16:02:53,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 78 transitions, 595 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 16:02:53,664 INFO L231 Difference]: Finished difference. Result has 69 places, 58 transitions, 420 flow [2024-06-20 16:02:53,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=420, PETRI_PLACES=69, PETRI_TRANSITIONS=58} [2024-06-20 16:02:53,665 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 40 predicate places. [2024-06-20 16:02:53,665 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 58 transitions, 420 flow [2024-06-20 16:02:53,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:53,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:53,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:53,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 16:02:53,666 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)] === [2024-06-20 16:02:53,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:53,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1463551134, now seen corresponding path program 3 times [2024-06-20 16:02:53,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:53,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394014467] [2024-06-20 16:02:53,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:53,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:53,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:54,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:54,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:54,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394014467] [2024-06-20 16:02:54,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394014467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:54,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:54,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:02:54,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108204412] [2024-06-20 16:02:54,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:54,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:02:54,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:54,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:02:54,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:02:54,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:02:54,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 58 transitions, 420 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:54,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:54,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:02:54,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:54,500 INFO L124 PetriNetUnfolderBase]: 243/433 cut-off events. [2024-06-20 16:02:54,501 INFO L125 PetriNetUnfolderBase]: For 4035/4035 co-relation queries the response was YES. [2024-06-20 16:02:54,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2026 conditions, 433 events. 243/433 cut-off events. For 4035/4035 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1615 event pairs, 53 based on Foata normal form. 3/435 useless extension candidates. Maximal degree in co-relation 1991. Up to 397 conditions per place. [2024-06-20 16:02:54,504 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 58 selfloop transitions, 12 changer transitions 0/72 dead transitions. [2024-06-20 16:02:54,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 72 transitions, 608 flow [2024-06-20 16:02:54,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:02:54,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:02:54,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 90 transitions. [2024-06-20 16:02:54,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-20 16:02:54,505 INFO L175 Difference]: Start difference. First operand has 69 places, 58 transitions, 420 flow. Second operand 8 states and 90 transitions. [2024-06-20 16:02:54,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 72 transitions, 608 flow [2024-06-20 16:02:54,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 72 transitions, 560 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-20 16:02:54,512 INFO L231 Difference]: Finished difference. Result has 73 places, 60 transitions, 423 flow [2024-06-20 16:02:54,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=423, PETRI_PLACES=73, PETRI_TRANSITIONS=60} [2024-06-20 16:02:54,512 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 44 predicate places. [2024-06-20 16:02:54,512 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 60 transitions, 423 flow [2024-06-20 16:02:54,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:54,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:54,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:54,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 16:02:54,513 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)] === [2024-06-20 16:02:54,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:54,514 INFO L85 PathProgramCache]: Analyzing trace with hash 475578283, now seen corresponding path program 1 times [2024-06-20 16:02:54,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:54,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311467596] [2024-06-20 16:02:54,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:54,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:54,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:55,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:55,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:55,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311467596] [2024-06-20 16:02:55,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311467596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:55,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:55,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:02:55,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829980579] [2024-06-20 16:02:55,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:55,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:02:55,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:55,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:02:55,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:02:55,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:02:55,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 60 transitions, 423 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:55,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:55,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:02:55,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:55,502 INFO L124 PetriNetUnfolderBase]: 239/427 cut-off events. [2024-06-20 16:02:55,502 INFO L125 PetriNetUnfolderBase]: For 4184/4184 co-relation queries the response was YES. [2024-06-20 16:02:55,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1967 conditions, 427 events. 239/427 cut-off events. For 4184/4184 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1589 event pairs, 49 based on Foata normal form. 2/428 useless extension candidates. Maximal degree in co-relation 1931. Up to 399 conditions per place. [2024-06-20 16:02:55,505 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 58 selfloop transitions, 12 changer transitions 0/72 dead transitions. [2024-06-20 16:02:55,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 72 transitions, 601 flow [2024-06-20 16:02:55,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:02:55,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:02:55,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 88 transitions. [2024-06-20 16:02:55,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-20 16:02:55,506 INFO L175 Difference]: Start difference. First operand has 73 places, 60 transitions, 423 flow. Second operand 8 states and 88 transitions. [2024-06-20 16:02:55,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 72 transitions, 601 flow [2024-06-20 16:02:55,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 72 transitions, 576 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 16:02:55,512 INFO L231 Difference]: Finished difference. Result has 75 places, 62 transitions, 447 flow [2024-06-20 16:02:55,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=447, PETRI_PLACES=75, PETRI_TRANSITIONS=62} [2024-06-20 16:02:55,513 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 46 predicate places. [2024-06-20 16:02:55,513 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 62 transitions, 447 flow [2024-06-20 16:02:55,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:55,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:55,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:55,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 16:02:55,514 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)] === [2024-06-20 16:02:55,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:55,514 INFO L85 PathProgramCache]: Analyzing trace with hash 468218976, now seen corresponding path program 4 times [2024-06-20 16:02:55,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:55,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395573634] [2024-06-20 16:02:55,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:55,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:55,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:56,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:56,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:56,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395573634] [2024-06-20 16:02:56,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395573634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:56,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:56,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:02:56,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842090642] [2024-06-20 16:02:56,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:56,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:02:56,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:56,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:02:56,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:02:56,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:02:56,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 62 transitions, 447 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:56,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:56,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:02:56,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:56,373 INFO L124 PetriNetUnfolderBase]: 233/418 cut-off events. [2024-06-20 16:02:56,373 INFO L125 PetriNetUnfolderBase]: For 4310/4310 co-relation queries the response was YES. [2024-06-20 16:02:56,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1932 conditions, 418 events. 233/418 cut-off events. For 4310/4310 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1567 event pairs, 44 based on Foata normal form. 3/420 useless extension candidates. Maximal degree in co-relation 1895. Up to 370 conditions per place. [2024-06-20 16:02:56,376 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 59 selfloop transitions, 15 changer transitions 0/76 dead transitions. [2024-06-20 16:02:56,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 76 transitions, 631 flow [2024-06-20 16:02:56,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:02:56,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:02:56,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 94 transitions. [2024-06-20 16:02:56,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39166666666666666 [2024-06-20 16:02:56,377 INFO L175 Difference]: Start difference. First operand has 75 places, 62 transitions, 447 flow. Second operand 8 states and 94 transitions. [2024-06-20 16:02:56,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 76 transitions, 631 flow [2024-06-20 16:02:56,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 76 transitions, 593 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 16:02:56,384 INFO L231 Difference]: Finished difference. Result has 77 places, 62 transitions, 444 flow [2024-06-20 16:02:56,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=444, PETRI_PLACES=77, PETRI_TRANSITIONS=62} [2024-06-20 16:02:56,385 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 48 predicate places. [2024-06-20 16:02:56,385 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 62 transitions, 444 flow [2024-06-20 16:02:56,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:56,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:56,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:56,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 16:02:56,387 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)] === [2024-06-20 16:02:56,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:56,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1290067713, now seen corresponding path program 1 times [2024-06-20 16:02:56,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:56,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913979482] [2024-06-20 16:02:56,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:56,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:56,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:57,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:57,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:57,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913979482] [2024-06-20 16:02:57,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913979482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:57,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:57,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:02:57,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134212690] [2024-06-20 16:02:57,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:57,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:02:57,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:57,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:02:57,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:02:57,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:02:57,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 62 transitions, 444 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:57,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:57,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:02:57,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:57,859 INFO L124 PetriNetUnfolderBase]: 230/413 cut-off events. [2024-06-20 16:02:57,859 INFO L125 PetriNetUnfolderBase]: For 4402/4402 co-relation queries the response was YES. [2024-06-20 16:02:57,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1906 conditions, 413 events. 230/413 cut-off events. For 4402/4402 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1521 event pairs, 46 based on Foata normal form. 2/414 useless extension candidates. Maximal degree in co-relation 1868. Up to 387 conditions per place. [2024-06-20 16:02:57,862 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 59 selfloop transitions, 11 changer transitions 0/72 dead transitions. [2024-06-20 16:02:57,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 72 transitions, 606 flow [2024-06-20 16:02:57,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:02:57,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:02:57,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 86 transitions. [2024-06-20 16:02:57,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35833333333333334 [2024-06-20 16:02:57,863 INFO L175 Difference]: Start difference. First operand has 77 places, 62 transitions, 444 flow. Second operand 8 states and 86 transitions. [2024-06-20 16:02:57,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 72 transitions, 606 flow [2024-06-20 16:02:57,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 72 transitions, 543 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-20 16:02:57,869 INFO L231 Difference]: Finished difference. Result has 77 places, 62 transitions, 407 flow [2024-06-20 16:02:57,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=407, PETRI_PLACES=77, PETRI_TRANSITIONS=62} [2024-06-20 16:02:57,869 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 48 predicate places. [2024-06-20 16:02:57,870 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 62 transitions, 407 flow [2024-06-20 16:02:57,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:57,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:57,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:57,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 16:02:57,870 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)] === [2024-06-20 16:02:57,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:57,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1208104863, now seen corresponding path program 1 times [2024-06-20 16:02:57,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:57,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462189558] [2024-06-20 16:02:57,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:57,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:57,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:58,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:58,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:58,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462189558] [2024-06-20 16:02:58,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462189558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:58,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:58,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:02:58,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869472508] [2024-06-20 16:02:58,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:58,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:02:58,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:58,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:02:58,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:02:58,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:02:58,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 62 transitions, 407 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) [2024-06-20 16:02:58,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:58,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:02:58,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:58,755 INFO L124 PetriNetUnfolderBase]: 234/421 cut-off events. [2024-06-20 16:02:58,755 INFO L125 PetriNetUnfolderBase]: For 4769/4769 co-relation queries the response was YES. [2024-06-20 16:02:58,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1904 conditions, 421 events. 234/421 cut-off events. For 4769/4769 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1567 event pairs, 33 based on Foata normal form. 2/422 useless extension candidates. Maximal degree in co-relation 1865. Up to 320 conditions per place. [2024-06-20 16:02:58,760 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 60 selfloop transitions, 18 changer transitions 0/80 dead transitions. [2024-06-20 16:02:58,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 80 transitions, 651 flow [2024-06-20 16:02:58,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:02:58,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:02:58,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 96 transitions. [2024-06-20 16:02:58,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 16:02:58,762 INFO L175 Difference]: Start difference. First operand has 77 places, 62 transitions, 407 flow. Second operand 8 states and 96 transitions. [2024-06-20 16:02:58,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 80 transitions, 651 flow [2024-06-20 16:02:58,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 80 transitions, 621 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-20 16:02:58,775 INFO L231 Difference]: Finished difference. Result has 78 places, 63 transitions, 427 flow [2024-06-20 16:02:58,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=427, PETRI_PLACES=78, PETRI_TRANSITIONS=63} [2024-06-20 16:02:58,776 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 49 predicate places. [2024-06-20 16:02:58,776 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 63 transitions, 427 flow [2024-06-20 16:02:58,776 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) [2024-06-20 16:02:58,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:58,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:58,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 16:02:58,777 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)] === [2024-06-20 16:02:58,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:58,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1208044413, now seen corresponding path program 2 times [2024-06-20 16:02:58,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:58,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613961028] [2024-06-20 16:02:58,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:58,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:58,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:59,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:59,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:59,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613961028] [2024-06-20 16:02:59,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613961028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:59,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:59,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:02:59,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812917710] [2024-06-20 16:02:59,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:59,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:02:59,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:59,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:02:59,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:02:59,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:02:59,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 63 transitions, 427 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) [2024-06-20 16:02:59,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:59,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:02:59,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:59,681 INFO L124 PetriNetUnfolderBase]: 241/434 cut-off events. [2024-06-20 16:02:59,681 INFO L125 PetriNetUnfolderBase]: For 5292/5292 co-relation queries the response was YES. [2024-06-20 16:02:59,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1998 conditions, 434 events. 241/434 cut-off events. For 5292/5292 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1640 event pairs, 50 based on Foata normal form. 2/435 useless extension candidates. Maximal degree in co-relation 1959. Up to 367 conditions per place. [2024-06-20 16:02:59,684 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 61 selfloop transitions, 18 changer transitions 0/81 dead transitions. [2024-06-20 16:02:59,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 81 transitions, 645 flow [2024-06-20 16:02:59,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:02:59,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:02:59,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 96 transitions. [2024-06-20 16:02:59,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 16:02:59,685 INFO L175 Difference]: Start difference. First operand has 78 places, 63 transitions, 427 flow. Second operand 8 states and 96 transitions. [2024-06-20 16:02:59,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 81 transitions, 645 flow [2024-06-20 16:02:59,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 81 transitions, 600 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-20 16:02:59,692 INFO L231 Difference]: Finished difference. Result has 81 places, 66 transitions, 448 flow [2024-06-20 16:02:59,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=448, PETRI_PLACES=81, PETRI_TRANSITIONS=66} [2024-06-20 16:02:59,693 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 52 predicate places. [2024-06-20 16:02:59,693 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 66 transitions, 448 flow [2024-06-20 16:02:59,693 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) [2024-06-20 16:02:59,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:59,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:59,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 16:02:59,694 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)] === [2024-06-20 16:02:59,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:59,694 INFO L85 PathProgramCache]: Analyzing trace with hash -83998065, now seen corresponding path program 1 times [2024-06-20 16:02:59,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:59,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49897465] [2024-06-20 16:02:59,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:59,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:59,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:00,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:00,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:00,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49897465] [2024-06-20 16:03:00,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49897465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:00,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:00,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:03:00,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970221727] [2024-06-20 16:03:00,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:00,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:03:00,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:00,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:03:00,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:03:00,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:00,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 66 transitions, 448 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) 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) [2024-06-20 16:03:00,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:00,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:00,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:00,612 INFO L124 PetriNetUnfolderBase]: 260/465 cut-off events. [2024-06-20 16:03:00,613 INFO L125 PetriNetUnfolderBase]: For 6530/6530 co-relation queries the response was YES. [2024-06-20 16:03:00,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2150 conditions, 465 events. 260/465 cut-off events. For 6530/6530 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1799 event pairs, 46 based on Foata normal form. 3/467 useless extension candidates. Maximal degree in co-relation 2110. Up to 267 conditions per place. [2024-06-20 16:03:00,616 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 56 selfloop transitions, 37 changer transitions 0/95 dead transitions. [2024-06-20 16:03:00,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 95 transitions, 768 flow [2024-06-20 16:03:00,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:03:00,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:03:00,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 128 transitions. [2024-06-20 16:03:00,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4266666666666667 [2024-06-20 16:03:00,618 INFO L175 Difference]: Start difference. First operand has 81 places, 66 transitions, 448 flow. Second operand 10 states and 128 transitions. [2024-06-20 16:03:00,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 95 transitions, 768 flow [2024-06-20 16:03:00,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 95 transitions, 729 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 16:03:00,629 INFO L231 Difference]: Finished difference. Result has 87 places, 72 transitions, 545 flow [2024-06-20 16:03:00,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=545, PETRI_PLACES=87, PETRI_TRANSITIONS=72} [2024-06-20 16:03:00,629 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 58 predicate places. [2024-06-20 16:03:00,629 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 72 transitions, 545 flow [2024-06-20 16:03:00,630 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) [2024-06-20 16:03:00,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:00,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:00,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 16:03:00,630 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)] === [2024-06-20 16:03:00,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:00,631 INFO L85 PathProgramCache]: Analyzing trace with hash -81201679, now seen corresponding path program 3 times [2024-06-20 16:03:00,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:00,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012702702] [2024-06-20 16:03:00,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:00,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:00,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:01,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:01,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:01,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012702702] [2024-06-20 16:03:01,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012702702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:01,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:01,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:03:01,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205492127] [2024-06-20 16:03:01,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:01,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:03:01,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:01,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:03:01,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:03:01,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:01,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 72 transitions, 545 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) [2024-06-20 16:03:01,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:01,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:01,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:01,554 INFO L124 PetriNetUnfolderBase]: 257/460 cut-off events. [2024-06-20 16:03:01,554 INFO L125 PetriNetUnfolderBase]: For 6544/6544 co-relation queries the response was YES. [2024-06-20 16:03:01,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2261 conditions, 460 events. 257/460 cut-off events. For 6544/6544 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1780 event pairs, 53 based on Foata normal form. 2/461 useless extension candidates. Maximal degree in co-relation 2220. Up to 408 conditions per place. [2024-06-20 16:03:01,557 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 66 selfloop transitions, 16 changer transitions 0/84 dead transitions. [2024-06-20 16:03:01,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 84 transitions, 737 flow [2024-06-20 16:03:01,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:03:01,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:03:01,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 93 transitions. [2024-06-20 16:03:01,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-06-20 16:03:01,559 INFO L175 Difference]: Start difference. First operand has 87 places, 72 transitions, 545 flow. Second operand 8 states and 93 transitions. [2024-06-20 16:03:01,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 84 transitions, 737 flow [2024-06-20 16:03:01,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 84 transitions, 677 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-20 16:03:01,568 INFO L231 Difference]: Finished difference. Result has 89 places, 72 transitions, 521 flow [2024-06-20 16:03:01,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=521, PETRI_PLACES=89, PETRI_TRANSITIONS=72} [2024-06-20 16:03:01,569 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 60 predicate places. [2024-06-20 16:03:01,569 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 72 transitions, 521 flow [2024-06-20 16:03:01,569 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) [2024-06-20 16:03:01,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:01,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:01,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 16:03:01,570 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)] === [2024-06-20 16:03:01,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:01,570 INFO L85 PathProgramCache]: Analyzing trace with hash 34089615, now seen corresponding path program 2 times [2024-06-20 16:03:01,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:01,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884857031] [2024-06-20 16:03:01,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:01,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:01,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:02,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:02,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:02,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884857031] [2024-06-20 16:03:02,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884857031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:02,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:02,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:03:02,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985942201] [2024-06-20 16:03:02,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:02,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:03:02,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:02,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:03:02,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:03:02,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:02,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 72 transitions, 521 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) [2024-06-20 16:03:02,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:02,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:02,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:02,409 INFO L124 PetriNetUnfolderBase]: 260/465 cut-off events. [2024-06-20 16:03:02,409 INFO L125 PetriNetUnfolderBase]: For 6710/6710 co-relation queries the response was YES. [2024-06-20 16:03:02,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2289 conditions, 465 events. 260/465 cut-off events. For 6710/6710 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1804 event pairs, 48 based on Foata normal form. 1/465 useless extension candidates. Maximal degree in co-relation 2246. Up to 370 conditions per place. [2024-06-20 16:03:02,413 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 72 selfloop transitions, 29 changer transitions 0/103 dead transitions. [2024-06-20 16:03:02,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 103 transitions, 907 flow [2024-06-20 16:03:02,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:03:02,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:03:02,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 105 transitions. [2024-06-20 16:03:02,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-20 16:03:02,415 INFO L175 Difference]: Start difference. First operand has 89 places, 72 transitions, 521 flow. Second operand 8 states and 105 transitions. [2024-06-20 16:03:02,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 103 transitions, 907 flow [2024-06-20 16:03:02,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 103 transitions, 856 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-20 16:03:02,424 INFO L231 Difference]: Finished difference. Result has 91 places, 85 transitions, 673 flow [2024-06-20 16:03:02,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=673, PETRI_PLACES=91, PETRI_TRANSITIONS=85} [2024-06-20 16:03:02,425 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 62 predicate places. [2024-06-20 16:03:02,425 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 85 transitions, 673 flow [2024-06-20 16:03:02,426 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) [2024-06-20 16:03:02,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:02,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:02,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 16:03:02,426 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)] === [2024-06-20 16:03:02,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:02,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1089951959, now seen corresponding path program 3 times [2024-06-20 16:03:02,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:02,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857573385] [2024-06-20 16:03:02,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:02,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:02,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:03,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:03,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:03,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857573385] [2024-06-20 16:03:03,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857573385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:03,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:03,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:03:03,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563656113] [2024-06-20 16:03:03,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:03,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:03:03,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:03,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:03:03,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:03:03,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:03,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 85 transitions, 673 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) [2024-06-20 16:03:03,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:03,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:03,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:03,419 INFO L124 PetriNetUnfolderBase]: 269/480 cut-off events. [2024-06-20 16:03:03,420 INFO L125 PetriNetUnfolderBase]: For 8016/8016 co-relation queries the response was YES. [2024-06-20 16:03:03,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2505 conditions, 480 events. 269/480 cut-off events. For 8016/8016 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1886 event pairs, 38 based on Foata normal form. 3/482 useless extension candidates. Maximal degree in co-relation 2459. Up to 339 conditions per place. [2024-06-20 16:03:03,423 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 66 selfloop transitions, 40 changer transitions 0/108 dead transitions. [2024-06-20 16:03:03,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 108 transitions, 976 flow [2024-06-20 16:03:03,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:03:03,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:03:03,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 107 transitions. [2024-06-20 16:03:03,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44583333333333336 [2024-06-20 16:03:03,424 INFO L175 Difference]: Start difference. First operand has 91 places, 85 transitions, 673 flow. Second operand 8 states and 107 transitions. [2024-06-20 16:03:03,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 108 transitions, 976 flow [2024-06-20 16:03:03,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 108 transitions, 940 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-20 16:03:03,434 INFO L231 Difference]: Finished difference. Result has 96 places, 89 transitions, 777 flow [2024-06-20 16:03:03,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=777, PETRI_PLACES=96, PETRI_TRANSITIONS=89} [2024-06-20 16:03:03,434 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 67 predicate places. [2024-06-20 16:03:03,435 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 89 transitions, 777 flow [2024-06-20 16:03:03,435 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) [2024-06-20 16:03:03,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:03,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:03,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 16:03:03,435 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)] === [2024-06-20 16:03:03,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:03,436 INFO L85 PathProgramCache]: Analyzing trace with hash 34267245, now seen corresponding path program 4 times [2024-06-20 16:03:03,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:03,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272999073] [2024-06-20 16:03:03,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:03,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:03,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:04,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:04,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:04,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272999073] [2024-06-20 16:03:04,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272999073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:04,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:04,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:03:04,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440959769] [2024-06-20 16:03:04,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:04,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:03:04,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:04,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:03:04,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:03:04,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:04,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 89 transitions, 777 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:04,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:04,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:04,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:04,470 INFO L124 PetriNetUnfolderBase]: 278/495 cut-off events. [2024-06-20 16:03:04,470 INFO L125 PetriNetUnfolderBase]: For 8778/8778 co-relation queries the response was YES. [2024-06-20 16:03:04,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2676 conditions, 495 events. 278/495 cut-off events. For 8778/8778 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1972 event pairs, 42 based on Foata normal form. 3/497 useless extension candidates. Maximal degree in co-relation 2629. Up to 354 conditions per place. [2024-06-20 16:03:04,474 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 74 selfloop transitions, 35 changer transitions 0/111 dead transitions. [2024-06-20 16:03:04,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 111 transitions, 1087 flow [2024-06-20 16:03:04,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:03:04,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:03:04,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 113 transitions. [2024-06-20 16:03:04,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4185185185185185 [2024-06-20 16:03:04,475 INFO L175 Difference]: Start difference. First operand has 96 places, 89 transitions, 777 flow. Second operand 9 states and 113 transitions. [2024-06-20 16:03:04,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 111 transitions, 1087 flow [2024-06-20 16:03:04,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 111 transitions, 1001 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 16:03:04,488 INFO L231 Difference]: Finished difference. Result has 99 places, 93 transitions, 823 flow [2024-06-20 16:03:04,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=691, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=823, PETRI_PLACES=99, PETRI_TRANSITIONS=93} [2024-06-20 16:03:04,489 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 70 predicate places. [2024-06-20 16:03:04,489 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 93 transitions, 823 flow [2024-06-20 16:03:04,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:04,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:04,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:04,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 16:03:04,490 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)] === [2024-06-20 16:03:04,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:04,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1868299821, now seen corresponding path program 5 times [2024-06-20 16:03:04,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:04,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141664919] [2024-06-20 16:03:04,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:04,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:04,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:05,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:05,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:05,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141664919] [2024-06-20 16:03:05,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141664919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:05,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:05,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:03:05,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470330575] [2024-06-20 16:03:05,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:05,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:03:05,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:05,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:03:05,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:03:05,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:05,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 93 transitions, 823 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:05,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:05,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:05,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:05,456 INFO L124 PetriNetUnfolderBase]: 287/510 cut-off events. [2024-06-20 16:03:05,456 INFO L125 PetriNetUnfolderBase]: For 9454/9454 co-relation queries the response was YES. [2024-06-20 16:03:05,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2794 conditions, 510 events. 287/510 cut-off events. For 9454/9454 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2024 event pairs, 46 based on Foata normal form. 3/512 useless extension candidates. Maximal degree in co-relation 2746. Up to 451 conditions per place. [2024-06-20 16:03:05,459 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 89 selfloop transitions, 22 changer transitions 0/113 dead transitions. [2024-06-20 16:03:05,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 113 transitions, 1142 flow [2024-06-20 16:03:05,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:03:05,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:03:05,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 105 transitions. [2024-06-20 16:03:05,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-20 16:03:05,462 INFO L175 Difference]: Start difference. First operand has 99 places, 93 transitions, 823 flow. Second operand 9 states and 105 transitions. [2024-06-20 16:03:05,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 113 transitions, 1142 flow [2024-06-20 16:03:05,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 113 transitions, 1058 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-20 16:03:05,475 INFO L231 Difference]: Finished difference. Result has 101 places, 97 transitions, 853 flow [2024-06-20 16:03:05,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=739, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=853, PETRI_PLACES=101, PETRI_TRANSITIONS=97} [2024-06-20 16:03:05,476 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 72 predicate places. [2024-06-20 16:03:05,476 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 97 transitions, 853 flow [2024-06-20 16:03:05,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:05,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:05,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:05,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 16:03:05,477 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)] === [2024-06-20 16:03:05,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:05,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1345981067, now seen corresponding path program 6 times [2024-06-20 16:03:05,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:05,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883327597] [2024-06-20 16:03:05,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:05,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:05,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:06,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:06,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:06,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883327597] [2024-06-20 16:03:06,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883327597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:06,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:06,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:03:06,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514548938] [2024-06-20 16:03:06,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:06,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:03:06,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:06,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:03:06,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:03:06,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:06,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 97 transitions, 853 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:06,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:06,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:06,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:06,455 INFO L124 PetriNetUnfolderBase]: 281/501 cut-off events. [2024-06-20 16:03:06,455 INFO L125 PetriNetUnfolderBase]: For 9007/9007 co-relation queries the response was YES. [2024-06-20 16:03:06,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2646 conditions, 501 events. 281/501 cut-off events. For 9007/9007 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1991 event pairs, 47 based on Foata normal form. 3/503 useless extension candidates. Maximal degree in co-relation 2597. Up to 454 conditions per place. [2024-06-20 16:03:06,459 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 91 selfloop transitions, 18 changer transitions 0/111 dead transitions. [2024-06-20 16:03:06,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 111 transitions, 1107 flow [2024-06-20 16:03:06,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:03:06,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:03:06,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2024-06-20 16:03:06,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37407407407407406 [2024-06-20 16:03:06,463 INFO L175 Difference]: Start difference. First operand has 101 places, 97 transitions, 853 flow. Second operand 9 states and 101 transitions. [2024-06-20 16:03:06,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 111 transitions, 1107 flow [2024-06-20 16:03:06,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 111 transitions, 1033 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-20 16:03:06,478 INFO L231 Difference]: Finished difference. Result has 103 places, 97 transitions, 823 flow [2024-06-20 16:03:06,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=779, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=823, PETRI_PLACES=103, PETRI_TRANSITIONS=97} [2024-06-20 16:03:06,478 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 74 predicate places. [2024-06-20 16:03:06,478 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 97 transitions, 823 flow [2024-06-20 16:03:06,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:06,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:06,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:06,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 16:03:06,479 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)] === [2024-06-20 16:03:06,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:06,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1345743731, now seen corresponding path program 1 times [2024-06-20 16:03:06,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:06,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325060167] [2024-06-20 16:03:06,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:06,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:06,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:07,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:07,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:07,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325060167] [2024-06-20 16:03:07,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325060167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:07,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:07,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:03:07,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255042726] [2024-06-20 16:03:07,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:07,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:03:07,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:07,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:03:07,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:03:07,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:07,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 97 transitions, 823 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:07,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:07,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:07,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:07,491 INFO L124 PetriNetUnfolderBase]: 277/495 cut-off events. [2024-06-20 16:03:07,492 INFO L125 PetriNetUnfolderBase]: For 8358/8358 co-relation queries the response was YES. [2024-06-20 16:03:07,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2553 conditions, 495 events. 277/495 cut-off events. For 8358/8358 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1970 event pairs, 46 based on Foata normal form. 2/496 useless extension candidates. Maximal degree in co-relation 2503. Up to 459 conditions per place. [2024-06-20 16:03:07,499 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 95 selfloop transitions, 14 changer transitions 0/111 dead transitions. [2024-06-20 16:03:07,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 111 transitions, 1081 flow [2024-06-20 16:03:07,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:03:07,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:03:07,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 98 transitions. [2024-06-20 16:03:07,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.362962962962963 [2024-06-20 16:03:07,500 INFO L175 Difference]: Start difference. First operand has 103 places, 97 transitions, 823 flow. Second operand 9 states and 98 transitions. [2024-06-20 16:03:07,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 111 transitions, 1081 flow [2024-06-20 16:03:07,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 111 transitions, 994 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-20 16:03:07,515 INFO L231 Difference]: Finished difference. Result has 104 places, 99 transitions, 787 flow [2024-06-20 16:03:07,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=787, PETRI_PLACES=104, PETRI_TRANSITIONS=99} [2024-06-20 16:03:07,516 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 75 predicate places. [2024-06-20 16:03:07,516 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 99 transitions, 787 flow [2024-06-20 16:03:07,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:07,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:07,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:07,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 16:03:07,517 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)] === [2024-06-20 16:03:07,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:07,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1689150471, now seen corresponding path program 1 times [2024-06-20 16:03:07,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:07,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916222951] [2024-06-20 16:03:07,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:07,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:07,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:08,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:08,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:08,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916222951] [2024-06-20 16:03:08,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916222951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:08,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:08,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:03:08,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374651267] [2024-06-20 16:03:08,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:08,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:03:08,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:08,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:03:08,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:03:08,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:08,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 99 transitions, 787 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:08,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:08,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:08,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:08,528 INFO L124 PetriNetUnfolderBase]: 324/588 cut-off events. [2024-06-20 16:03:08,528 INFO L125 PetriNetUnfolderBase]: For 14712/14712 co-relation queries the response was YES. [2024-06-20 16:03:08,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3218 conditions, 588 events. 324/588 cut-off events. For 14712/14712 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2493 event pairs, 39 based on Foata normal form. 2/589 useless extension candidates. Maximal degree in co-relation 3167. Up to 198 conditions per place. [2024-06-20 16:03:08,537 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 72 selfloop transitions, 53 changer transitions 0/127 dead transitions. [2024-06-20 16:03:08,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 127 transitions, 1193 flow [2024-06-20 16:03:08,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:03:08,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:03:08,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 118 transitions. [2024-06-20 16:03:08,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43703703703703706 [2024-06-20 16:03:08,538 INFO L175 Difference]: Start difference. First operand has 104 places, 99 transitions, 787 flow. Second operand 9 states and 118 transitions. [2024-06-20 16:03:08,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 127 transitions, 1193 flow [2024-06-20 16:03:08,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 127 transitions, 1158 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-20 16:03:08,556 INFO L231 Difference]: Finished difference. Result has 106 places, 100 transitions, 870 flow [2024-06-20 16:03:08,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=752, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=870, PETRI_PLACES=106, PETRI_TRANSITIONS=100} [2024-06-20 16:03:08,557 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 77 predicate places. [2024-06-20 16:03:08,557 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 100 transitions, 870 flow [2024-06-20 16:03:08,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:08,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:08,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:08,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 16:03:08,557 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)] === [2024-06-20 16:03:08,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:08,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1691028296, now seen corresponding path program 1 times [2024-06-20 16:03:08,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:08,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392669972] [2024-06-20 16:03:08,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:08,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:08,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:09,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:09,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:09,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392669972] [2024-06-20 16:03:09,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392669972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:09,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:09,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:03:09,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542253963] [2024-06-20 16:03:09,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:09,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:03:09,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:09,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:03:09,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:03:09,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:09,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 100 transitions, 870 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:09,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:09,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:09,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:09,593 INFO L124 PetriNetUnfolderBase]: 333/603 cut-off events. [2024-06-20 16:03:09,593 INFO L125 PetriNetUnfolderBase]: For 15885/15885 co-relation queries the response was YES. [2024-06-20 16:03:09,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3427 conditions, 603 events. 333/603 cut-off events. For 15885/15885 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2589 event pairs, 54 based on Foata normal form. 2/604 useless extension candidates. Maximal degree in co-relation 3375. Up to 341 conditions per place. [2024-06-20 16:03:09,597 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 69 selfloop transitions, 55 changer transitions 0/126 dead transitions. [2024-06-20 16:03:09,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 126 transitions, 1278 flow [2024-06-20 16:03:09,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:03:09,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:03:09,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 116 transitions. [2024-06-20 16:03:09,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42962962962962964 [2024-06-20 16:03:09,598 INFO L175 Difference]: Start difference. First operand has 106 places, 100 transitions, 870 flow. Second operand 9 states and 116 transitions. [2024-06-20 16:03:09,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 126 transitions, 1278 flow [2024-06-20 16:03:09,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 126 transitions, 1159 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-20 16:03:09,616 INFO L231 Difference]: Finished difference. Result has 109 places, 106 transitions, 929 flow [2024-06-20 16:03:09,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=929, PETRI_PLACES=109, PETRI_TRANSITIONS=106} [2024-06-20 16:03:09,616 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 80 predicate places. [2024-06-20 16:03:09,616 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 106 transitions, 929 flow [2024-06-20 16:03:09,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:09,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:09,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:09,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 16:03:09,617 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)] === [2024-06-20 16:03:09,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:09,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1691024421, now seen corresponding path program 2 times [2024-06-20 16:03:09,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:09,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761686497] [2024-06-20 16:03:09,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:09,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:09,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:10,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:10,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:10,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761686497] [2024-06-20 16:03:10,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761686497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:10,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:10,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:03:10,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608552585] [2024-06-20 16:03:10,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:10,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:03:10,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:10,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:03:10,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:03:10,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:10,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 106 transitions, 929 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:10,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:10,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:10,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:10,716 INFO L124 PetriNetUnfolderBase]: 387/709 cut-off events. [2024-06-20 16:03:10,716 INFO L125 PetriNetUnfolderBase]: For 24662/24662 co-relation queries the response was YES. [2024-06-20 16:03:10,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4315 conditions, 709 events. 387/709 cut-off events. For 24662/24662 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3222 event pairs, 74 based on Foata normal form. 2/710 useless extension candidates. Maximal degree in co-relation 4262. Up to 374 conditions per place. [2024-06-20 16:03:10,721 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 74 selfloop transitions, 62 changer transitions 0/138 dead transitions. [2024-06-20 16:03:10,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 138 transitions, 1376 flow [2024-06-20 16:03:10,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:03:10,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:03:10,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 136 transitions. [2024-06-20 16:03:10,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4533333333333333 [2024-06-20 16:03:10,722 INFO L175 Difference]: Start difference. First operand has 109 places, 106 transitions, 929 flow. Second operand 10 states and 136 transitions. [2024-06-20 16:03:10,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 138 transitions, 1376 flow [2024-06-20 16:03:10,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 138 transitions, 1313 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-20 16:03:10,746 INFO L231 Difference]: Finished difference. Result has 116 places, 109 transitions, 1035 flow [2024-06-20 16:03:10,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=870, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1035, PETRI_PLACES=116, PETRI_TRANSITIONS=109} [2024-06-20 16:03:10,747 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 87 predicate places. [2024-06-20 16:03:10,747 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 109 transitions, 1035 flow [2024-06-20 16:03:10,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:10,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:10,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:10,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 16:03:10,748 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)] === [2024-06-20 16:03:10,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:10,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1691028141, now seen corresponding path program 3 times [2024-06-20 16:03:10,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:10,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823239196] [2024-06-20 16:03:10,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:10,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:10,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:11,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:11,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:11,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823239196] [2024-06-20 16:03:11,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823239196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:11,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:11,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:03:11,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797763068] [2024-06-20 16:03:11,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:11,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:03:11,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:11,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:03:11,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:03:11,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:11,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 109 transitions, 1035 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:11,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:11,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:11,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:11,896 INFO L124 PetriNetUnfolderBase]: 365/671 cut-off events. [2024-06-20 16:03:11,896 INFO L125 PetriNetUnfolderBase]: For 25288/25288 co-relation queries the response was YES. [2024-06-20 16:03:11,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3877 conditions, 671 events. 365/671 cut-off events. For 25288/25288 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3014 event pairs, 64 based on Foata normal form. 16/686 useless extension candidates. Maximal degree in co-relation 3821. Up to 394 conditions per place. [2024-06-20 16:03:11,900 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 68 selfloop transitions, 60 changer transitions 7/137 dead transitions. [2024-06-20 16:03:11,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 137 transitions, 1390 flow [2024-06-20 16:03:11,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:03:11,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:03:11,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 142 transitions. [2024-06-20 16:03:11,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4303030303030303 [2024-06-20 16:03:11,902 INFO L175 Difference]: Start difference. First operand has 116 places, 109 transitions, 1035 flow. Second operand 11 states and 142 transitions. [2024-06-20 16:03:11,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 137 transitions, 1390 flow [2024-06-20 16:03:11,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 137 transitions, 1299 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 16:03:11,935 INFO L231 Difference]: Finished difference. Result has 121 places, 107 transitions, 1051 flow [2024-06-20 16:03:11,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=944, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1051, PETRI_PLACES=121, PETRI_TRANSITIONS=107} [2024-06-20 16:03:11,935 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 92 predicate places. [2024-06-20 16:03:11,935 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 107 transitions, 1051 flow [2024-06-20 16:03:11,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:11,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:11,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:11,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 16:03:11,936 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)] === [2024-06-20 16:03:11,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:11,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1292169680, now seen corresponding path program 2 times [2024-06-20 16:03:11,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:11,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565240643] [2024-06-20 16:03:11,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:11,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:11,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:12,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:12,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:12,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565240643] [2024-06-20 16:03:12,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565240643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:12,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:12,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:03:12,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006232134] [2024-06-20 16:03:12,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:12,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:03:12,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:12,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:03:12,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:03:12,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:12,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 107 transitions, 1051 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:12,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:12,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:12,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:13,243 INFO L124 PetriNetUnfolderBase]: 356/656 cut-off events. [2024-06-20 16:03:13,244 INFO L125 PetriNetUnfolderBase]: For 19310/19310 co-relation queries the response was YES. [2024-06-20 16:03:13,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3936 conditions, 656 events. 356/656 cut-off events. For 19310/19310 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2948 event pairs, 68 based on Foata normal form. 2/657 useless extension candidates. Maximal degree in co-relation 3878. Up to 517 conditions per place. [2024-06-20 16:03:13,248 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 91 selfloop transitions, 34 changer transitions 0/127 dead transitions. [2024-06-20 16:03:13,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 127 transitions, 1385 flow [2024-06-20 16:03:13,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:03:13,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:03:13,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 110 transitions. [2024-06-20 16:03:13,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-20 16:03:13,250 INFO L175 Difference]: Start difference. First operand has 121 places, 107 transitions, 1051 flow. Second operand 9 states and 110 transitions. [2024-06-20 16:03:13,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 127 transitions, 1385 flow [2024-06-20 16:03:13,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 127 transitions, 1255 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-20 16:03:13,285 INFO L231 Difference]: Finished difference. Result has 121 places, 111 transitions, 1050 flow [2024-06-20 16:03:13,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=925, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1050, PETRI_PLACES=121, PETRI_TRANSITIONS=111} [2024-06-20 16:03:13,285 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 92 predicate places. [2024-06-20 16:03:13,285 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 111 transitions, 1050 flow [2024-06-20 16:03:13,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:13,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:13,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:13,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 16:03:13,286 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)] === [2024-06-20 16:03:13,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:13,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1292025530, now seen corresponding path program 3 times [2024-06-20 16:03:13,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:13,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140511714] [2024-06-20 16:03:13,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:13,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:13,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:14,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:14,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:14,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140511714] [2024-06-20 16:03:14,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140511714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:14,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:14,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:03:14,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38865139] [2024-06-20 16:03:14,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:14,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:03:14,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:14,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:03:14,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:03:14,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:14,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 111 transitions, 1050 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:14,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:14,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:14,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:14,398 INFO L124 PetriNetUnfolderBase]: 362/666 cut-off events. [2024-06-20 16:03:14,398 INFO L125 PetriNetUnfolderBase]: For 20480/20480 co-relation queries the response was YES. [2024-06-20 16:03:14,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3966 conditions, 666 events. 362/666 cut-off events. For 20480/20480 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2993 event pairs, 60 based on Foata normal form. 2/667 useless extension candidates. Maximal degree in co-relation 3906. Up to 493 conditions per place. [2024-06-20 16:03:14,402 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 87 selfloop transitions, 42 changer transitions 0/131 dead transitions. [2024-06-20 16:03:14,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 131 transitions, 1377 flow [2024-06-20 16:03:14,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:03:14,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:03:14,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 115 transitions. [2024-06-20 16:03:14,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-20 16:03:14,403 INFO L175 Difference]: Start difference. First operand has 121 places, 111 transitions, 1050 flow. Second operand 9 states and 115 transitions. [2024-06-20 16:03:14,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 131 transitions, 1377 flow [2024-06-20 16:03:14,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 131 transitions, 1299 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 16:03:14,432 INFO L231 Difference]: Finished difference. Result has 124 places, 113 transitions, 1091 flow [2024-06-20 16:03:14,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=972, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1091, PETRI_PLACES=124, PETRI_TRANSITIONS=113} [2024-06-20 16:03:14,433 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 95 predicate places. [2024-06-20 16:03:14,433 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 113 transitions, 1091 flow [2024-06-20 16:03:14,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:14,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:14,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:14,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 16:03:14,433 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)] === [2024-06-20 16:03:14,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:14,433 INFO L85 PathProgramCache]: Analyzing trace with hash 571080629, now seen corresponding path program 4 times [2024-06-20 16:03:14,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:14,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489849239] [2024-06-20 16:03:14,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:14,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:14,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:15,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:15,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:15,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489849239] [2024-06-20 16:03:15,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489849239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:15,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:15,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:03:15,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451294609] [2024-06-20 16:03:15,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:15,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:03:15,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:15,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:03:15,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:03:15,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:15,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 113 transitions, 1091 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:15,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:15,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:15,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:15,471 INFO L124 PetriNetUnfolderBase]: 366/674 cut-off events. [2024-06-20 16:03:15,472 INFO L125 PetriNetUnfolderBase]: For 21678/21678 co-relation queries the response was YES. [2024-06-20 16:03:15,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4040 conditions, 674 events. 366/674 cut-off events. For 21678/21678 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3045 event pairs, 60 based on Foata normal form. 2/675 useless extension candidates. Maximal degree in co-relation 3979. Up to 528 conditions per place. [2024-06-20 16:03:15,475 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 95 selfloop transitions, 38 changer transitions 0/135 dead transitions. [2024-06-20 16:03:15,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 135 transitions, 1484 flow [2024-06-20 16:03:15,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:03:15,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:03:15,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 115 transitions. [2024-06-20 16:03:15,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-20 16:03:15,476 INFO L175 Difference]: Start difference. First operand has 124 places, 113 transitions, 1091 flow. Second operand 9 states and 115 transitions. [2024-06-20 16:03:15,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 135 transitions, 1484 flow [2024-06-20 16:03:15,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 135 transitions, 1367 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-20 16:03:15,516 INFO L231 Difference]: Finished difference. Result has 124 places, 114 transitions, 1061 flow [2024-06-20 16:03:15,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=974, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1061, PETRI_PLACES=124, PETRI_TRANSITIONS=114} [2024-06-20 16:03:15,517 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 95 predicate places. [2024-06-20 16:03:15,517 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 114 transitions, 1061 flow [2024-06-20 16:03:15,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:15,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:15,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:15,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 16:03:15,517 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)] === [2024-06-20 16:03:15,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:15,517 INFO L85 PathProgramCache]: Analyzing trace with hash 571084504, now seen corresponding path program 4 times [2024-06-20 16:03:15,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:15,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196086501] [2024-06-20 16:03:15,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:15,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:15,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:16,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:16,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:16,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196086501] [2024-06-20 16:03:16,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196086501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:16,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:16,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:03:16,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208479422] [2024-06-20 16:03:16,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:16,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:03:16,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:16,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:03:16,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:03:16,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:16,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 114 transitions, 1061 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:16,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:16,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:16,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:16,714 INFO L124 PetriNetUnfolderBase]: 372/684 cut-off events. [2024-06-20 16:03:16,714 INFO L125 PetriNetUnfolderBase]: For 22867/22867 co-relation queries the response was YES. [2024-06-20 16:03:16,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4093 conditions, 684 events. 372/684 cut-off events. For 22867/22867 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3102 event pairs, 56 based on Foata normal form. 2/685 useless extension candidates. Maximal degree in co-relation 4033. Up to 448 conditions per place. [2024-06-20 16:03:16,718 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 78 selfloop transitions, 60 changer transitions 0/140 dead transitions. [2024-06-20 16:03:16,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 140 transitions, 1495 flow [2024-06-20 16:03:16,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:03:16,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:03:16,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 123 transitions. [2024-06-20 16:03:16,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45555555555555555 [2024-06-20 16:03:16,719 INFO L175 Difference]: Start difference. First operand has 124 places, 114 transitions, 1061 flow. Second operand 9 states and 123 transitions. [2024-06-20 16:03:16,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 140 transitions, 1495 flow [2024-06-20 16:03:16,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 140 transitions, 1360 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-20 16:03:16,754 INFO L231 Difference]: Finished difference. Result has 125 places, 116 transitions, 1081 flow [2024-06-20 16:03:16,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=926, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1081, PETRI_PLACES=125, PETRI_TRANSITIONS=116} [2024-06-20 16:03:16,755 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 96 predicate places. [2024-06-20 16:03:16,755 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 116 transitions, 1081 flow [2024-06-20 16:03:16,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:16,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:16,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:16,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 16:03:16,755 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)] === [2024-06-20 16:03:16,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:16,756 INFO L85 PathProgramCache]: Analyzing trace with hash 571084349, now seen corresponding path program 5 times [2024-06-20 16:03:16,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:16,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227041790] [2024-06-20 16:03:16,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:16,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:16,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:17,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:17,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:17,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227041790] [2024-06-20 16:03:17,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227041790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:17,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:17,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:03:17,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081332441] [2024-06-20 16:03:17,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:17,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:03:17,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:17,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:03:17,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:03:17,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:17,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 116 transitions, 1081 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:17,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:17,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:17,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:17,857 INFO L124 PetriNetUnfolderBase]: 353/651 cut-off events. [2024-06-20 16:03:17,857 INFO L125 PetriNetUnfolderBase]: For 22766/22766 co-relation queries the response was YES. [2024-06-20 16:03:17,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3411 conditions, 651 events. 353/651 cut-off events. For 22766/22766 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2950 event pairs, 47 based on Foata normal form. 14/664 useless extension candidates. Maximal degree in co-relation 3351. Up to 402 conditions per place. [2024-06-20 16:03:17,861 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 81 selfloop transitions, 53 changer transitions 12/148 dead transitions. [2024-06-20 16:03:17,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 148 transitions, 1471 flow [2024-06-20 16:03:17,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:03:17,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:03:17,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 137 transitions. [2024-06-20 16:03:17,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45666666666666667 [2024-06-20 16:03:17,874 INFO L175 Difference]: Start difference. First operand has 125 places, 116 transitions, 1081 flow. Second operand 10 states and 137 transitions. [2024-06-20 16:03:17,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 148 transitions, 1471 flow [2024-06-20 16:03:17,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 148 transitions, 1321 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-20 16:03:17,905 INFO L231 Difference]: Finished difference. Result has 128 places, 113 transitions, 1016 flow [2024-06-20 16:03:17,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=931, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1016, PETRI_PLACES=128, PETRI_TRANSITIONS=113} [2024-06-20 16:03:17,906 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 99 predicate places. [2024-06-20 16:03:17,906 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 113 transitions, 1016 flow [2024-06-20 16:03:17,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:17,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:17,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:17,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 16:03:17,907 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)] === [2024-06-20 16:03:17,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:17,908 INFO L85 PathProgramCache]: Analyzing trace with hash 571228654, now seen corresponding path program 5 times [2024-06-20 16:03:17,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:17,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389096759] [2024-06-20 16:03:17,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:17,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:17,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:18,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:18,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:18,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389096759] [2024-06-20 16:03:18,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389096759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:18,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:18,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:03:18,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068318542] [2024-06-20 16:03:18,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:18,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:03:18,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:18,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:03:18,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:03:18,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:18,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 113 transitions, 1016 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:18,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:18,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:18,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:19,042 INFO L124 PetriNetUnfolderBase]: 327/601 cut-off events. [2024-06-20 16:03:19,042 INFO L125 PetriNetUnfolderBase]: For 15229/15229 co-relation queries the response was YES. [2024-06-20 16:03:19,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3225 conditions, 601 events. 327/601 cut-off events. For 15229/15229 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2667 event pairs, 41 based on Foata normal form. 2/602 useless extension candidates. Maximal degree in co-relation 3164. Up to 440 conditions per place. [2024-06-20 16:03:19,046 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 90 selfloop transitions, 42 changer transitions 2/136 dead transitions. [2024-06-20 16:03:19,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 136 transitions, 1365 flow [2024-06-20 16:03:19,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:03:19,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:03:19,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 116 transitions. [2024-06-20 16:03:19,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42962962962962964 [2024-06-20 16:03:19,047 INFO L175 Difference]: Start difference. First operand has 128 places, 113 transitions, 1016 flow. Second operand 9 states and 116 transitions. [2024-06-20 16:03:19,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 136 transitions, 1365 flow [2024-06-20 16:03:19,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 136 transitions, 1260 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-20 16:03:19,074 INFO L231 Difference]: Finished difference. Result has 129 places, 115 transitions, 1034 flow [2024-06-20 16:03:19,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=911, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1034, PETRI_PLACES=129, PETRI_TRANSITIONS=115} [2024-06-20 16:03:19,075 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 100 predicate places. [2024-06-20 16:03:19,075 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 115 transitions, 1034 flow [2024-06-20 16:03:19,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:19,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:19,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:19,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 16:03:19,075 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)] === [2024-06-20 16:03:19,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:19,076 INFO L85 PathProgramCache]: Analyzing trace with hash 576591034, now seen corresponding path program 6 times [2024-06-20 16:03:19,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:19,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399495925] [2024-06-20 16:03:19,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:19,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:19,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:19,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:19,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:19,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399495925] [2024-06-20 16:03:19,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399495925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:19,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:19,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:03:19,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163824020] [2024-06-20 16:03:19,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:19,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:03:19,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:19,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:03:19,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:03:19,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:19,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 115 transitions, 1034 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:19,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:19,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:19,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:20,294 INFO L124 PetriNetUnfolderBase]: 333/611 cut-off events. [2024-06-20 16:03:20,295 INFO L125 PetriNetUnfolderBase]: For 16225/16225 co-relation queries the response was YES. [2024-06-20 16:03:20,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3296 conditions, 611 events. 333/611 cut-off events. For 16225/16225 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2717 event pairs, 43 based on Foata normal form. 2/612 useless extension candidates. Maximal degree in co-relation 3234. Up to 442 conditions per place. [2024-06-20 16:03:20,298 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 98 selfloop transitions, 38 changer transitions 0/138 dead transitions. [2024-06-20 16:03:20,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 138 transitions, 1392 flow [2024-06-20 16:03:20,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:03:20,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:03:20,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-06-20 16:03:20,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 16:03:20,313 INFO L175 Difference]: Start difference. First operand has 129 places, 115 transitions, 1034 flow. Second operand 10 states and 125 transitions. [2024-06-20 16:03:20,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 138 transitions, 1392 flow [2024-06-20 16:03:20,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 138 transitions, 1289 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-20 16:03:20,343 INFO L231 Difference]: Finished difference. Result has 132 places, 117 transitions, 1050 flow [2024-06-20 16:03:20,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=931, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1050, PETRI_PLACES=132, PETRI_TRANSITIONS=117} [2024-06-20 16:03:20,344 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 103 predicate places. [2024-06-20 16:03:20,345 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 117 transitions, 1050 flow [2024-06-20 16:03:20,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:20,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:20,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:20,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 16:03:20,345 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)] === [2024-06-20 16:03:20,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:20,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1062285455, now seen corresponding path program 6 times [2024-06-20 16:03:20,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:20,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511355636] [2024-06-20 16:03:20,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:20,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:20,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:21,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:21,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:21,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511355636] [2024-06-20 16:03:21,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511355636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:21,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:21,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:03:21,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270657566] [2024-06-20 16:03:21,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:21,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:03:21,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:21,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:03:21,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:03:21,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:21,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 117 transitions, 1050 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:21,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:21,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:21,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:21,448 INFO L124 PetriNetUnfolderBase]: 357/663 cut-off events. [2024-06-20 16:03:21,448 INFO L125 PetriNetUnfolderBase]: For 26456/26456 co-relation queries the response was YES. [2024-06-20 16:03:21,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3439 conditions, 663 events. 357/663 cut-off events. For 26456/26456 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3044 event pairs, 51 based on Foata normal form. 14/676 useless extension candidates. Maximal degree in co-relation 3376. Up to 464 conditions per place. [2024-06-20 16:03:21,452 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 100 selfloop transitions, 28 changer transitions 13/143 dead transitions. [2024-06-20 16:03:21,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 143 transitions, 1419 flow [2024-06-20 16:03:21,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:03:21,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:03:21,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2024-06-20 16:03:21,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42333333333333334 [2024-06-20 16:03:21,461 INFO L175 Difference]: Start difference. First operand has 132 places, 117 transitions, 1050 flow. Second operand 10 states and 127 transitions. [2024-06-20 16:03:21,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 143 transitions, 1419 flow [2024-06-20 16:03:21,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 143 transitions, 1320 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-20 16:03:21,493 INFO L231 Difference]: Finished difference. Result has 134 places, 113 transitions, 979 flow [2024-06-20 16:03:21,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=951, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=979, PETRI_PLACES=134, PETRI_TRANSITIONS=113} [2024-06-20 16:03:21,494 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 105 predicate places. [2024-06-20 16:03:21,494 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 113 transitions, 979 flow [2024-06-20 16:03:21,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:21,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:21,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:21,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 16:03:21,494 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)] === [2024-06-20 16:03:21,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:21,495 INFO L85 PathProgramCache]: Analyzing trace with hash 2082720618, now seen corresponding path program 7 times [2024-06-20 16:03:21,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:21,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233113210] [2024-06-20 16:03:21,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:21,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:21,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:22,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:22,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:22,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233113210] [2024-06-20 16:03:22,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233113210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:22,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:22,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:03:22,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199433798] [2024-06-20 16:03:22,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:22,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:03:22,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:22,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:03:22,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:03:22,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:22,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 113 transitions, 979 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:22,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:22,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:22,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:22,692 INFO L124 PetriNetUnfolderBase]: 327/609 cut-off events. [2024-06-20 16:03:22,692 INFO L125 PetriNetUnfolderBase]: For 17610/17610 co-relation queries the response was YES. [2024-06-20 16:03:22,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3242 conditions, 609 events. 327/609 cut-off events. For 17610/17610 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2759 event pairs, 40 based on Foata normal form. 2/610 useless extension candidates. Maximal degree in co-relation 3178. Up to 530 conditions per place. [2024-06-20 16:03:22,696 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 105 selfloop transitions, 27 changer transitions 0/134 dead transitions. [2024-06-20 16:03:22,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 134 transitions, 1330 flow [2024-06-20 16:03:22,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:03:22,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:03:22,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2024-06-20 16:03:22,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39 [2024-06-20 16:03:22,697 INFO L175 Difference]: Start difference. First operand has 134 places, 113 transitions, 979 flow. Second operand 10 states and 117 transitions. [2024-06-20 16:03:22,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 134 transitions, 1330 flow [2024-06-20 16:03:22,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 134 transitions, 1272 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-20 16:03:22,727 INFO L231 Difference]: Finished difference. Result has 136 places, 115 transitions, 1022 flow [2024-06-20 16:03:22,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=921, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1022, PETRI_PLACES=136, PETRI_TRANSITIONS=115} [2024-06-20 16:03:22,727 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 107 predicate places. [2024-06-20 16:03:22,727 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 115 transitions, 1022 flow [2024-06-20 16:03:22,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:22,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:22,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:22,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 16:03:22,729 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)] === [2024-06-20 16:03:22,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:22,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1100073900, now seen corresponding path program 1 times [2024-06-20 16:03:22,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:22,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666985840] [2024-06-20 16:03:22,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:22,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:22,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:23,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:23,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:23,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666985840] [2024-06-20 16:03:23,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666985840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:23,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:23,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:03:23,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718041270] [2024-06-20 16:03:23,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:23,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:03:23,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:23,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:03:23,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:03:23,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:23,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 115 transitions, 1022 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:23,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:23,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:23,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:23,858 INFO L124 PetriNetUnfolderBase]: 331/617 cut-off events. [2024-06-20 16:03:23,858 INFO L125 PetriNetUnfolderBase]: For 18633/18633 co-relation queries the response was YES. [2024-06-20 16:03:23,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3307 conditions, 617 events. 331/617 cut-off events. For 18633/18633 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2809 event pairs, 47 based on Foata normal form. 2/618 useless extension candidates. Maximal degree in co-relation 3242. Up to 583 conditions per place. [2024-06-20 16:03:23,862 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 113 selfloop transitions, 13 changer transitions 0/128 dead transitions. [2024-06-20 16:03:23,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 128 transitions, 1314 flow [2024-06-20 16:03:23,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:03:23,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:03:23,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 97 transitions. [2024-06-20 16:03:23,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3592592592592593 [2024-06-20 16:03:23,863 INFO L175 Difference]: Start difference. First operand has 136 places, 115 transitions, 1022 flow. Second operand 9 states and 97 transitions. [2024-06-20 16:03:23,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 128 transitions, 1314 flow [2024-06-20 16:03:23,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 128 transitions, 1233 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-20 16:03:23,899 INFO L231 Difference]: Finished difference. Result has 137 places, 116 transitions, 987 flow [2024-06-20 16:03:23,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=941, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=987, PETRI_PLACES=137, PETRI_TRANSITIONS=116} [2024-06-20 16:03:23,899 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 108 predicate places. [2024-06-20 16:03:23,899 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 116 transitions, 987 flow [2024-06-20 16:03:23,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:23,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:23,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:23,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 16:03:23,900 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)] === [2024-06-20 16:03:23,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:23,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1224476224, now seen corresponding path program 2 times [2024-06-20 16:03:23,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:23,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101590714] [2024-06-20 16:03:23,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:23,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:23,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:24,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:24,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:24,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101590714] [2024-06-20 16:03:24,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101590714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:24,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:24,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:03:24,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033846438] [2024-06-20 16:03:24,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:24,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:03:24,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:24,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:03:24,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:03:24,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:24,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 116 transitions, 987 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:24,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:24,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:24,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:25,099 INFO L124 PetriNetUnfolderBase]: 335/625 cut-off events. [2024-06-20 16:03:25,099 INFO L125 PetriNetUnfolderBase]: For 19192/19192 co-relation queries the response was YES. [2024-06-20 16:03:25,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3302 conditions, 625 events. 335/625 cut-off events. For 19192/19192 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2847 event pairs, 53 based on Foata normal form. 2/626 useless extension candidates. Maximal degree in co-relation 3236. Up to 596 conditions per place. [2024-06-20 16:03:25,103 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 114 selfloop transitions, 13 changer transitions 0/129 dead transitions. [2024-06-20 16:03:25,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 129 transitions, 1286 flow [2024-06-20 16:03:25,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:03:25,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:03:25,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-06-20 16:03:25,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35555555555555557 [2024-06-20 16:03:25,104 INFO L175 Difference]: Start difference. First operand has 137 places, 116 transitions, 987 flow. Second operand 9 states and 96 transitions. [2024-06-20 16:03:25,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 129 transitions, 1286 flow [2024-06-20 16:03:25,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 129 transitions, 1250 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-20 16:03:25,139 INFO L231 Difference]: Finished difference. Result has 140 places, 118 transitions, 1009 flow [2024-06-20 16:03:25,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=951, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1009, PETRI_PLACES=140, PETRI_TRANSITIONS=118} [2024-06-20 16:03:25,140 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 111 predicate places. [2024-06-20 16:03:25,140 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 118 transitions, 1009 flow [2024-06-20 16:03:25,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:25,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:25,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:25,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 16:03:25,140 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)] === [2024-06-20 16:03:25,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:25,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1231894834, now seen corresponding path program 3 times [2024-06-20 16:03:25,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:25,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768791907] [2024-06-20 16:03:25,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:25,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:25,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:25,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:25,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:25,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768791907] [2024-06-20 16:03:25,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768791907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:25,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:25,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:03:25,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085910079] [2024-06-20 16:03:25,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:25,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:03:25,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:25,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:03:25,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:03:26,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:26,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 118 transitions, 1009 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:26,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:26,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:26,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:26,270 INFO L124 PetriNetUnfolderBase]: 339/633 cut-off events. [2024-06-20 16:03:26,271 INFO L125 PetriNetUnfolderBase]: For 20149/20149 co-relation queries the response was YES. [2024-06-20 16:03:26,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3366 conditions, 633 events. 339/633 cut-off events. For 20149/20149 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2896 event pairs, 46 based on Foata normal form. 2/634 useless extension candidates. Maximal degree in co-relation 3298. Up to 599 conditions per place. [2024-06-20 16:03:26,274 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 117 selfloop transitions, 12 changer transitions 0/131 dead transitions. [2024-06-20 16:03:26,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 131 transitions, 1311 flow [2024-06-20 16:03:26,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:03:26,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:03:26,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 95 transitions. [2024-06-20 16:03:26,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35185185185185186 [2024-06-20 16:03:26,275 INFO L175 Difference]: Start difference. First operand has 140 places, 118 transitions, 1009 flow. Second operand 9 states and 95 transitions. [2024-06-20 16:03:26,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 131 transitions, 1311 flow [2024-06-20 16:03:26,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 131 transitions, 1273 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 16:03:26,313 INFO L231 Difference]: Finished difference. Result has 143 places, 119 transitions, 1019 flow [2024-06-20 16:03:26,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=971, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1019, PETRI_PLACES=143, PETRI_TRANSITIONS=119} [2024-06-20 16:03:26,314 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 114 predicate places. [2024-06-20 16:03:26,314 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 119 transitions, 1019 flow [2024-06-20 16:03:26,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:26,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:26,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:26,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 16:03:26,314 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)] === [2024-06-20 16:03:26,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:26,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1100341306, now seen corresponding path program 8 times [2024-06-20 16:03:26,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:26,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737019085] [2024-06-20 16:03:26,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:26,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:26,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:27,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:27,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:27,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737019085] [2024-06-20 16:03:27,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737019085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:27,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:27,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:03:27,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615922924] [2024-06-20 16:03:27,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:27,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:03:27,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:27,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:03:27,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:03:27,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:27,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 119 transitions, 1019 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:27,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:27,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:27,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:27,577 INFO L124 PetriNetUnfolderBase]: 345/643 cut-off events. [2024-06-20 16:03:27,577 INFO L125 PetriNetUnfolderBase]: For 21299/21299 co-relation queries the response was YES. [2024-06-20 16:03:27,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3443 conditions, 643 events. 345/643 cut-off events. For 21299/21299 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 2966 event pairs, 47 based on Foata normal form. 2/644 useless extension candidates. Maximal degree in co-relation 3374. Up to 599 conditions per place. [2024-06-20 16:03:27,581 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 117 selfloop transitions, 16 changer transitions 0/135 dead transitions. [2024-06-20 16:03:27,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 135 transitions, 1357 flow [2024-06-20 16:03:27,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:03:27,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:03:27,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 108 transitions. [2024-06-20 16:03:27,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36 [2024-06-20 16:03:27,581 INFO L175 Difference]: Start difference. First operand has 143 places, 119 transitions, 1019 flow. Second operand 10 states and 108 transitions. [2024-06-20 16:03:27,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 135 transitions, 1357 flow [2024-06-20 16:03:27,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 135 transitions, 1319 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-20 16:03:27,622 INFO L231 Difference]: Finished difference. Result has 146 places, 121 transitions, 1064 flow [2024-06-20 16:03:27,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=981, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1064, PETRI_PLACES=146, PETRI_TRANSITIONS=121} [2024-06-20 16:03:27,622 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 117 predicate places. [2024-06-20 16:03:27,622 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 121 transitions, 1064 flow [2024-06-20 16:03:27,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:27,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:27,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:27,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 16:03:27,623 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)] === [2024-06-20 16:03:27,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:27,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1107698536, now seen corresponding path program 9 times [2024-06-20 16:03:27,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:27,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240820284] [2024-06-20 16:03:27,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:27,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:27,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:28,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:28,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:28,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240820284] [2024-06-20 16:03:28,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240820284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:28,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:28,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:03:28,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974646025] [2024-06-20 16:03:28,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:28,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:03:28,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:28,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:03:28,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:03:28,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:28,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 121 transitions, 1064 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:28,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:28,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:28,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:28,720 INFO L124 PetriNetUnfolderBase]: 341/637 cut-off events. [2024-06-20 16:03:28,721 INFO L125 PetriNetUnfolderBase]: For 20030/20030 co-relation queries the response was YES. [2024-06-20 16:03:28,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3324 conditions, 637 events. 341/637 cut-off events. For 20030/20030 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 2914 event pairs, 44 based on Foata normal form. 2/638 useless extension candidates. Maximal degree in co-relation 3254. Up to 554 conditions per place. [2024-06-20 16:03:28,724 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 108 selfloop transitions, 27 changer transitions 0/137 dead transitions. [2024-06-20 16:03:28,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 137 transitions, 1371 flow [2024-06-20 16:03:28,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:03:28,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:03:28,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-20 16:03:28,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37666666666666665 [2024-06-20 16:03:28,725 INFO L175 Difference]: Start difference. First operand has 146 places, 121 transitions, 1064 flow. Second operand 10 states and 113 transitions. [2024-06-20 16:03:28,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 137 transitions, 1371 flow [2024-06-20 16:03:28,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 137 transitions, 1292 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-20 16:03:28,764 INFO L231 Difference]: Finished difference. Result has 148 places, 121 transitions, 1044 flow [2024-06-20 16:03:28,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=985, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1044, PETRI_PLACES=148, PETRI_TRANSITIONS=121} [2024-06-20 16:03:28,764 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 119 predicate places. [2024-06-20 16:03:28,764 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 121 transitions, 1044 flow [2024-06-20 16:03:28,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:28,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:28,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:28,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 16:03:28,765 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)] === [2024-06-20 16:03:28,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:28,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1107698691, now seen corresponding path program 7 times [2024-06-20 16:03:28,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:28,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920631144] [2024-06-20 16:03:28,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:28,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:28,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:29,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:29,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:29,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920631144] [2024-06-20 16:03:29,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920631144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:29,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:29,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:03:29,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462135839] [2024-06-20 16:03:29,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:29,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:03:29,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:29,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:03:29,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:03:29,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:29,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 121 transitions, 1044 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:29,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:29,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:29,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:29,797 INFO L124 PetriNetUnfolderBase]: 365/689 cut-off events. [2024-06-20 16:03:29,797 INFO L125 PetriNetUnfolderBase]: For 33726/33726 co-relation queries the response was YES. [2024-06-20 16:03:29,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3465 conditions, 689 events. 365/689 cut-off events. For 33726/33726 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3258 event pairs, 54 based on Foata normal form. 14/702 useless extension candidates. Maximal degree in co-relation 3394. Up to 584 conditions per place. [2024-06-20 16:03:29,804 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 113 selfloop transitions, 14 changer transitions 13/142 dead transitions. [2024-06-20 16:03:29,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 142 transitions, 1398 flow [2024-06-20 16:03:29,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:03:29,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:03:29,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-20 16:03:29,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-20 16:03:29,808 INFO L175 Difference]: Start difference. First operand has 148 places, 121 transitions, 1044 flow. Second operand 10 states and 115 transitions. [2024-06-20 16:03:29,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 142 transitions, 1398 flow [2024-06-20 16:03:29,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 142 transitions, 1266 flow, removed 11 selfloop flow, removed 10 redundant places. [2024-06-20 16:03:29,849 INFO L231 Difference]: Finished difference. Result has 148 places, 117 transitions, 921 flow [2024-06-20 16:03:29,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=912, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=921, PETRI_PLACES=148, PETRI_TRANSITIONS=117} [2024-06-20 16:03:29,850 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 119 predicate places. [2024-06-20 16:03:29,850 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 117 transitions, 921 flow [2024-06-20 16:03:29,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:29,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:29,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:29,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 16:03:29,850 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)] === [2024-06-20 16:03:29,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:29,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1012888104, now seen corresponding path program 4 times [2024-06-20 16:03:29,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:29,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206256381] [2024-06-20 16:03:29,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:29,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:29,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:30,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:30,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:30,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206256381] [2024-06-20 16:03:30,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206256381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:30,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:30,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:03:30,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836122893] [2024-06-20 16:03:30,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:30,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:03:30,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:30,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:03:30,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:03:30,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:30,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 117 transitions, 921 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:30,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:30,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:30,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:30,948 INFO L124 PetriNetUnfolderBase]: 326/620 cut-off events. [2024-06-20 16:03:30,948 INFO L125 PetriNetUnfolderBase]: For 18924/18924 co-relation queries the response was YES. [2024-06-20 16:03:30,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2981 conditions, 620 events. 326/620 cut-off events. For 18924/18924 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 2892 event pairs, 47 based on Foata normal form. 2/621 useless extension candidates. Maximal degree in co-relation 2910. Up to 579 conditions per place. [2024-06-20 16:03:30,952 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 112 selfloop transitions, 16 changer transitions 0/130 dead transitions. [2024-06-20 16:03:30,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 130 transitions, 1210 flow [2024-06-20 16:03:30,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:03:30,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:03:30,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 100 transitions. [2024-06-20 16:03:30,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-20 16:03:30,953 INFO L175 Difference]: Start difference. First operand has 148 places, 117 transitions, 921 flow. Second operand 9 states and 100 transitions. [2024-06-20 16:03:30,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 130 transitions, 1210 flow [2024-06-20 16:03:30,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 130 transitions, 1178 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-20 16:03:30,997 INFO L231 Difference]: Finished difference. Result has 150 places, 118 transitions, 937 flow [2024-06-20 16:03:30,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=889, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=937, PETRI_PLACES=150, PETRI_TRANSITIONS=118} [2024-06-20 16:03:30,997 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 121 predicate places. [2024-06-20 16:03:30,997 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 118 transitions, 937 flow [2024-06-20 16:03:30,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:30,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:30,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:30,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 16:03:30,998 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)] === [2024-06-20 16:03:30,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:30,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1902131313, now seen corresponding path program 8 times [2024-06-20 16:03:30,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:30,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688316863] [2024-06-20 16:03:30,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:30,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:31,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:31,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:31,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:31,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688316863] [2024-06-20 16:03:31,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688316863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:31,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:31,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:03:31,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89167790] [2024-06-20 16:03:31,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:31,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:03:31,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:31,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:03:31,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:03:31,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:31,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 118 transitions, 937 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:31,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:31,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:31,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:32,040 INFO L124 PetriNetUnfolderBase]: 323/615 cut-off events. [2024-06-20 16:03:32,040 INFO L125 PetriNetUnfolderBase]: For 17310/17310 co-relation queries the response was YES. [2024-06-20 16:03:32,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2889 conditions, 615 events. 323/615 cut-off events. For 17310/17310 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 2868 event pairs, 46 based on Foata normal form. 2/616 useless extension candidates. Maximal degree in co-relation 2816. Up to 580 conditions per place. [2024-06-20 16:03:32,044 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 109 selfloop transitions, 18 changer transitions 1/130 dead transitions. [2024-06-20 16:03:32,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 130 transitions, 1222 flow [2024-06-20 16:03:32,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:03:32,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:03:32,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 106 transitions. [2024-06-20 16:03:32,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35333333333333333 [2024-06-20 16:03:32,045 INFO L175 Difference]: Start difference. First operand has 150 places, 118 transitions, 937 flow. Second operand 10 states and 106 transitions. [2024-06-20 16:03:32,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 130 transitions, 1222 flow [2024-06-20 16:03:32,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 130 transitions, 1127 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-20 16:03:32,082 INFO L231 Difference]: Finished difference. Result has 150 places, 118 transitions, 882 flow [2024-06-20 16:03:32,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=842, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=882, PETRI_PLACES=150, PETRI_TRANSITIONS=118} [2024-06-20 16:03:32,083 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 121 predicate places. [2024-06-20 16:03:32,083 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 118 transitions, 882 flow [2024-06-20 16:03:32,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:32,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:32,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:32,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 16:03:32,083 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)] === [2024-06-20 16:03:32,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:32,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1347571904, now seen corresponding path program 1 times [2024-06-20 16:03:32,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:32,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142096451] [2024-06-20 16:03:32,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:32,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:32,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:32,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:32,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:32,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142096451] [2024-06-20 16:03:32,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142096451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:32,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:32,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:03:32,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825802405] [2024-06-20 16:03:32,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:32,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:03:32,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:32,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:03:32,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:03:32,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:32,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 118 transitions, 882 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:32,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:32,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:32,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:33,210 INFO L124 PetriNetUnfolderBase]: 344/658 cut-off events. [2024-06-20 16:03:33,210 INFO L125 PetriNetUnfolderBase]: For 32420/32420 co-relation queries the response was YES. [2024-06-20 16:03:33,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3193 conditions, 658 events. 344/658 cut-off events. For 32420/32420 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3050 event pairs, 53 based on Foata normal form. 8/665 useless extension candidates. Maximal degree in co-relation 3123. Up to 239 conditions per place. [2024-06-20 16:03:33,213 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 77 selfloop transitions, 53 changer transitions 15/147 dead transitions. [2024-06-20 16:03:33,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 147 transitions, 1352 flow [2024-06-20 16:03:33,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:03:33,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:03:33,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2024-06-20 16:03:33,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42333333333333334 [2024-06-20 16:03:33,214 INFO L175 Difference]: Start difference. First operand has 150 places, 118 transitions, 882 flow. Second operand 10 states and 127 transitions. [2024-06-20 16:03:33,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 147 transitions, 1352 flow [2024-06-20 16:03:33,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 147 transitions, 1277 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-20 16:03:33,264 INFO L231 Difference]: Finished difference. Result has 151 places, 115 transitions, 899 flow [2024-06-20 16:03:33,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=899, PETRI_PLACES=151, PETRI_TRANSITIONS=115} [2024-06-20 16:03:33,264 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 122 predicate places. [2024-06-20 16:03:33,264 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 115 transitions, 899 flow [2024-06-20 16:03:33,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:33,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:33,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:33,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 16:03:33,264 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)] === [2024-06-20 16:03:33,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:33,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1289364134, now seen corresponding path program 2 times [2024-06-20 16:03:33,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:33,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387856486] [2024-06-20 16:03:33,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:33,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:33,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:33,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:33,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:33,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387856486] [2024-06-20 16:03:33,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387856486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:33,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:33,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:03:33,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068188615] [2024-06-20 16:03:33,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:33,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:03:33,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:33,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:03:33,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:03:34,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:34,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 115 transitions, 899 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:34,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:34,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:34,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:34,377 INFO L124 PetriNetUnfolderBase]: 365/705 cut-off events. [2024-06-20 16:03:34,377 INFO L125 PetriNetUnfolderBase]: For 46685/46685 co-relation queries the response was YES. [2024-06-20 16:03:34,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3901 conditions, 705 events. 365/705 cut-off events. For 46685/46685 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3376 event pairs, 66 based on Foata normal form. 8/712 useless extension candidates. Maximal degree in co-relation 3830. Up to 370 conditions per place. [2024-06-20 16:03:34,381 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 80 selfloop transitions, 54 changer transitions 10/146 dead transitions. [2024-06-20 16:03:34,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 146 transitions, 1385 flow [2024-06-20 16:03:34,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:03:34,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:03:34,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 131 transitions. [2024-06-20 16:03:34,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43666666666666665 [2024-06-20 16:03:34,382 INFO L175 Difference]: Start difference. First operand has 151 places, 115 transitions, 899 flow. Second operand 10 states and 131 transitions. [2024-06-20 16:03:34,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 146 transitions, 1385 flow [2024-06-20 16:03:34,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 146 transitions, 1298 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-20 16:03:34,445 INFO L231 Difference]: Finished difference. Result has 149 places, 114 transitions, 924 flow [2024-06-20 16:03:34,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=818, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=924, PETRI_PLACES=149, PETRI_TRANSITIONS=114} [2024-06-20 16:03:34,446 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 120 predicate places. [2024-06-20 16:03:34,446 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 114 transitions, 924 flow [2024-06-20 16:03:34,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:34,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:34,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:34,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 16:03:34,446 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)] === [2024-06-20 16:03:34,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:34,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1586924154, now seen corresponding path program 3 times [2024-06-20 16:03:34,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:34,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433674150] [2024-06-20 16:03:34,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:34,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:34,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:35,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:35,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:35,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433674150] [2024-06-20 16:03:35,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433674150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:35,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:35,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:03:35,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399055747] [2024-06-20 16:03:35,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:35,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:03:35,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:35,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:03:35,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:03:35,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:35,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 114 transitions, 924 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:35,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:35,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:35,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:35,538 INFO L124 PetriNetUnfolderBase]: 334/644 cut-off events. [2024-06-20 16:03:35,539 INFO L125 PetriNetUnfolderBase]: For 33658/33658 co-relation queries the response was YES. [2024-06-20 16:03:35,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3277 conditions, 644 events. 334/644 cut-off events. For 33658/33658 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3013 event pairs, 57 based on Foata normal form. 10/653 useless extension candidates. Maximal degree in co-relation 3207. Up to 370 conditions per place. [2024-06-20 16:03:35,542 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 70 selfloop transitions, 51 changer transitions 16/139 dead transitions. [2024-06-20 16:03:35,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 139 transitions, 1270 flow [2024-06-20 16:03:35,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:03:35,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:03:35,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-06-20 16:03:35,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 16:03:35,543 INFO L175 Difference]: Start difference. First operand has 149 places, 114 transitions, 924 flow. Second operand 10 states and 125 transitions. [2024-06-20 16:03:35,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 139 transitions, 1270 flow [2024-06-20 16:03:35,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 139 transitions, 1158 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-20 16:03:35,577 INFO L231 Difference]: Finished difference. Result has 149 places, 110 transitions, 890 flow [2024-06-20 16:03:35,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=812, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=890, PETRI_PLACES=149, PETRI_TRANSITIONS=110} [2024-06-20 16:03:35,578 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 120 predicate places. [2024-06-20 16:03:35,578 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 110 transitions, 890 flow [2024-06-20 16:03:35,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:35,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:35,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:35,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 16:03:35,579 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)] === [2024-06-20 16:03:35,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:35,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1289479454, now seen corresponding path program 4 times [2024-06-20 16:03:35,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:35,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648859380] [2024-06-20 16:03:35,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:35,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:35,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:36,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:36,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:36,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648859380] [2024-06-20 16:03:36,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648859380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:36,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:36,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:03:36,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090258853] [2024-06-20 16:03:36,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:36,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:03:36,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:36,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:03:36,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:03:36,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:36,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 110 transitions, 890 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:36,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:36,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:36,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:36,635 INFO L124 PetriNetUnfolderBase]: 325/629 cut-off events. [2024-06-20 16:03:36,635 INFO L125 PetriNetUnfolderBase]: For 31199/31199 co-relation queries the response was YES. [2024-06-20 16:03:36,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3200 conditions, 629 events. 325/629 cut-off events. For 31199/31199 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2935 event pairs, 53 based on Foata normal form. 8/636 useless extension candidates. Maximal degree in co-relation 3131. Up to 360 conditions per place. [2024-06-20 16:03:36,638 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 65 selfloop transitions, 49 changer transitions 20/136 dead transitions. [2024-06-20 16:03:36,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 136 transitions, 1228 flow [2024-06-20 16:03:36,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:03:36,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:03:36,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-06-20 16:03:36,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41 [2024-06-20 16:03:36,639 INFO L175 Difference]: Start difference. First operand has 149 places, 110 transitions, 890 flow. Second operand 10 states and 123 transitions. [2024-06-20 16:03:36,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 136 transitions, 1228 flow [2024-06-20 16:03:36,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 136 transitions, 1122 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-20 16:03:36,682 INFO L231 Difference]: Finished difference. Result has 146 places, 107 transitions, 865 flow [2024-06-20 16:03:36,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=784, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=865, PETRI_PLACES=146, PETRI_TRANSITIONS=107} [2024-06-20 16:03:36,682 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 117 predicate places. [2024-06-20 16:03:36,682 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 107 transitions, 865 flow [2024-06-20 16:03:36,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:36,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:36,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:36,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 16:03:36,683 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)] === [2024-06-20 16:03:36,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:36,683 INFO L85 PathProgramCache]: Analyzing trace with hash 528809946, now seen corresponding path program 5 times [2024-06-20 16:03:36,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:36,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993128714] [2024-06-20 16:03:36,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:36,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:36,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:37,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:37,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:37,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993128714] [2024-06-20 16:03:37,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993128714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:37,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:37,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:03:37,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476676590] [2024-06-20 16:03:37,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:37,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:03:37,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:37,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:03:37,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:03:37,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:37,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 107 transitions, 865 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:37,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:37,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:37,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:37,822 INFO L124 PetriNetUnfolderBase]: 347/675 cut-off events. [2024-06-20 16:03:37,822 INFO L125 PetriNetUnfolderBase]: For 41365/41365 co-relation queries the response was YES. [2024-06-20 16:03:37,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3780 conditions, 675 events. 347/675 cut-off events. For 41365/41365 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3230 event pairs, 66 based on Foata normal form. 8/682 useless extension candidates. Maximal degree in co-relation 3711. Up to 437 conditions per place. [2024-06-20 16:03:37,826 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 94 selfloop transitions, 29 changer transitions 10/135 dead transitions. [2024-06-20 16:03:37,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 135 transitions, 1315 flow [2024-06-20 16:03:37,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:03:37,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:03:37,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 128 transitions. [2024-06-20 16:03:37,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4266666666666667 [2024-06-20 16:03:37,827 INFO L175 Difference]: Start difference. First operand has 146 places, 107 transitions, 865 flow. Second operand 10 states and 128 transitions. [2024-06-20 16:03:37,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 135 transitions, 1315 flow [2024-06-20 16:03:37,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 135 transitions, 1207 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-20 16:03:37,874 INFO L231 Difference]: Finished difference. Result has 143 places, 106 transitions, 817 flow [2024-06-20 16:03:37,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=761, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=817, PETRI_PLACES=143, PETRI_TRANSITIONS=106} [2024-06-20 16:03:37,875 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 114 predicate places. [2024-06-20 16:03:37,875 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 106 transitions, 817 flow [2024-06-20 16:03:37,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:37,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:37,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:37,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 16:03:37,875 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)] === [2024-06-20 16:03:37,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:37,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1402555276, now seen corresponding path program 6 times [2024-06-20 16:03:37,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:37,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898345866] [2024-06-20 16:03:37,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:37,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:37,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:38,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:38,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:38,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898345866] [2024-06-20 16:03:38,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898345866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:38,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:38,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:03:38,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894020776] [2024-06-20 16:03:38,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:38,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:03:38,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:38,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:03:38,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:03:38,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:38,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 106 transitions, 817 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:38,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:38,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:38,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:39,201 INFO L124 PetriNetUnfolderBase]: 316/614 cut-off events. [2024-06-20 16:03:39,202 INFO L125 PetriNetUnfolderBase]: For 30916/30916 co-relation queries the response was YES. [2024-06-20 16:03:39,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3052 conditions, 614 events. 316/614 cut-off events. For 30916/30916 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2848 event pairs, 57 based on Foata normal form. 10/623 useless extension candidates. Maximal degree in co-relation 2984. Up to 437 conditions per place. [2024-06-20 16:03:39,205 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 84 selfloop transitions, 26 changer transitions 16/128 dead transitions. [2024-06-20 16:03:39,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 128 transitions, 1133 flow [2024-06-20 16:03:39,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:03:39,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:03:39,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 122 transitions. [2024-06-20 16:03:39,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4066666666666667 [2024-06-20 16:03:39,206 INFO L175 Difference]: Start difference. First operand has 143 places, 106 transitions, 817 flow. Second operand 10 states and 122 transitions. [2024-06-20 16:03:39,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 128 transitions, 1133 flow [2024-06-20 16:03:39,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 128 transitions, 1071 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-20 16:03:39,245 INFO L231 Difference]: Finished difference. Result has 143 places, 102 transitions, 780 flow [2024-06-20 16:03:39,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=780, PETRI_PLACES=143, PETRI_TRANSITIONS=102} [2024-06-20 16:03:39,245 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 114 predicate places. [2024-06-20 16:03:39,245 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 102 transitions, 780 flow [2024-06-20 16:03:39,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:39,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:39,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:39,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 16:03:39,245 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)] === [2024-06-20 16:03:39,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:39,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1697746674, now seen corresponding path program 7 times [2024-06-20 16:03:39,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:39,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095111594] [2024-06-20 16:03:39,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:39,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:39,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:40,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:40,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:40,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095111594] [2024-06-20 16:03:40,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095111594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:40,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:40,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:03:40,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287509781] [2024-06-20 16:03:40,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:40,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:03:40,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:40,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:03:40,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:03:40,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:40,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 102 transitions, 780 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:40,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:40,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:40,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:40,420 INFO L124 PetriNetUnfolderBase]: 307/599 cut-off events. [2024-06-20 16:03:40,420 INFO L125 PetriNetUnfolderBase]: For 30868/30868 co-relation queries the response was YES. [2024-06-20 16:03:40,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2979 conditions, 599 events. 307/599 cut-off events. For 30868/30868 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2765 event pairs, 57 based on Foata normal form. 10/608 useless extension candidates. Maximal degree in co-relation 2912. Up to 419 conditions per place. [2024-06-20 16:03:40,423 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 80 selfloop transitions, 28 changer transitions 14/124 dead transitions. [2024-06-20 16:03:40,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 124 transitions, 1088 flow [2024-06-20 16:03:40,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:03:40,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:03:40,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-06-20 16:03:40,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41 [2024-06-20 16:03:40,425 INFO L175 Difference]: Start difference. First operand has 143 places, 102 transitions, 780 flow. Second operand 10 states and 123 transitions. [2024-06-20 16:03:40,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 124 transitions, 1088 flow [2024-06-20 16:03:40,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 124 transitions, 1032 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-20 16:03:40,461 INFO L231 Difference]: Finished difference. Result has 139 places, 99 transitions, 764 flow [2024-06-20 16:03:40,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=724, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=764, PETRI_PLACES=139, PETRI_TRANSITIONS=99} [2024-06-20 16:03:40,461 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 110 predicate places. [2024-06-20 16:03:40,462 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 99 transitions, 764 flow [2024-06-20 16:03:40,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:40,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:40,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:40,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 16:03:40,462 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)] === [2024-06-20 16:03:40,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:40,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1398081976, now seen corresponding path program 8 times [2024-06-20 16:03:40,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:40,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651243700] [2024-06-20 16:03:40,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:40,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:40,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:41,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:41,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:41,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651243700] [2024-06-20 16:03:41,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651243700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:41,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:41,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:03:41,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722747935] [2024-06-20 16:03:41,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:41,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:03:41,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:41,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:03:41,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:03:41,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:41,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 99 transitions, 764 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:41,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:41,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:41,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:41,567 INFO L124 PetriNetUnfolderBase]: 295/579 cut-off events. [2024-06-20 16:03:41,567 INFO L125 PetriNetUnfolderBase]: For 27440/27440 co-relation queries the response was YES. [2024-06-20 16:03:41,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2888 conditions, 579 events. 295/579 cut-off events. For 27440/27440 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2649 event pairs, 53 based on Foata normal form. 8/586 useless extension candidates. Maximal degree in co-relation 2822. Up to 409 conditions per place. [2024-06-20 16:03:41,570 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 78 selfloop transitions, 26 changer transitions 14/120 dead transitions. [2024-06-20 16:03:41,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 120 transitions, 1056 flow [2024-06-20 16:03:41,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:03:41,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:03:41,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 120 transitions. [2024-06-20 16:03:41,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 16:03:41,571 INFO L175 Difference]: Start difference. First operand has 139 places, 99 transitions, 764 flow. Second operand 10 states and 120 transitions. [2024-06-20 16:03:41,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 120 transitions, 1056 flow [2024-06-20 16:03:41,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 120 transitions, 996 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-20 16:03:41,601 INFO L231 Difference]: Finished difference. Result has 137 places, 96 transitions, 740 flow [2024-06-20 16:03:41,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=704, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=740, PETRI_PLACES=137, PETRI_TRANSITIONS=96} [2024-06-20 16:03:41,601 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 108 predicate places. [2024-06-20 16:03:41,601 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 96 transitions, 740 flow [2024-06-20 16:03:41,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:41,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:41,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:41,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 16:03:41,602 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)] === [2024-06-20 16:03:41,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:41,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1397966656, now seen corresponding path program 9 times [2024-06-20 16:03:41,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:41,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884928992] [2024-06-20 16:03:41,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:41,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:41,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:42,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:42,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:42,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884928992] [2024-06-20 16:03:42,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884928992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:42,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:42,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:03:42,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880778433] [2024-06-20 16:03:42,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:42,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:03:42,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:42,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:03:42,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:03:42,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:42,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 96 transitions, 740 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:42,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:42,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:42,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:42,796 INFO L124 PetriNetUnfolderBase]: 288/566 cut-off events. [2024-06-20 16:03:42,796 INFO L125 PetriNetUnfolderBase]: For 26279/26279 co-relation queries the response was YES. [2024-06-20 16:03:42,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2823 conditions, 566 events. 288/566 cut-off events. For 26279/26279 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2573 event pairs, 55 based on Foata normal form. 8/573 useless extension candidates. Maximal degree in co-relation 2758. Up to 413 conditions per place. [2024-06-20 16:03:42,798 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 77 selfloop transitions, 19 changer transitions 19/117 dead transitions. [2024-06-20 16:03:42,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 117 transitions, 1026 flow [2024-06-20 16:03:42,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:03:42,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:03:42,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 118 transitions. [2024-06-20 16:03:42,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3933333333333333 [2024-06-20 16:03:42,799 INFO L175 Difference]: Start difference. First operand has 137 places, 96 transitions, 740 flow. Second operand 10 states and 118 transitions. [2024-06-20 16:03:42,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 117 transitions, 1026 flow [2024-06-20 16:03:42,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 117 transitions, 970 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-20 16:03:42,830 INFO L231 Difference]: Finished difference. Result has 135 places, 90 transitions, 681 flow [2024-06-20 16:03:42,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=684, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=681, PETRI_PLACES=135, PETRI_TRANSITIONS=90} [2024-06-20 16:03:42,830 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 106 predicate places. [2024-06-20 16:03:42,831 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 90 transitions, 681 flow [2024-06-20 16:03:42,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:42,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:42,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:42,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 16:03:42,831 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)] === [2024-06-20 16:03:42,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:42,831 INFO L85 PathProgramCache]: Analyzing trace with hash 523631330, now seen corresponding path program 10 times [2024-06-20 16:03:42,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:42,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463179385] [2024-06-20 16:03:42,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:42,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:42,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:43,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:43,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:43,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463179385] [2024-06-20 16:03:43,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463179385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:43,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:43,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:03:43,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862215664] [2024-06-20 16:03:43,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:43,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:03:43,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:43,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:03:43,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:03:43,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:43,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 90 transitions, 681 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:43,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:43,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:43,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:43,931 INFO L124 PetriNetUnfolderBase]: 243/467 cut-off events. [2024-06-20 16:03:43,932 INFO L125 PetriNetUnfolderBase]: For 25055/25055 co-relation queries the response was YES. [2024-06-20 16:03:43,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2444 conditions, 467 events. 243/467 cut-off events. For 25055/25055 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1974 event pairs, 37 based on Foata normal form. 8/474 useless extension candidates. Maximal degree in co-relation 2380. Up to 149 conditions per place. [2024-06-20 16:03:43,934 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 55 selfloop transitions, 46 changer transitions 10/113 dead transitions. [2024-06-20 16:03:43,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 113 transitions, 1055 flow [2024-06-20 16:03:43,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:03:43,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:03:43,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 121 transitions. [2024-06-20 16:03:43,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4033333333333333 [2024-06-20 16:03:43,935 INFO L175 Difference]: Start difference. First operand has 135 places, 90 transitions, 681 flow. Second operand 10 states and 121 transitions. [2024-06-20 16:03:43,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 113 transitions, 1055 flow [2024-06-20 16:03:43,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 113 transitions, 972 flow, removed 10 selfloop flow, removed 11 redundant places. [2024-06-20 16:03:43,957 INFO L231 Difference]: Finished difference. Result has 127 places, 87 transitions, 684 flow [2024-06-20 16:03:43,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=608, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=684, PETRI_PLACES=127, PETRI_TRANSITIONS=87} [2024-06-20 16:03:43,957 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 98 predicate places. [2024-06-20 16:03:43,957 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 87 transitions, 684 flow [2024-06-20 16:03:43,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:43,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:43,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:43,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 16:03:43,958 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)] === [2024-06-20 16:03:43,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:43,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1595117378, now seen corresponding path program 11 times [2024-06-20 16:03:43,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:43,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346231941] [2024-06-20 16:03:43,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:43,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:43,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:44,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:44,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:44,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346231941] [2024-06-20 16:03:44,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346231941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:44,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:44,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:03:44,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544014975] [2024-06-20 16:03:44,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:44,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:03:44,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:44,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:03:44,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:03:44,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:44,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 87 transitions, 684 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:44,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:44,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:44,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:45,058 INFO L124 PetriNetUnfolderBase]: 237/457 cut-off events. [2024-06-20 16:03:45,058 INFO L125 PetriNetUnfolderBase]: For 23542/23542 co-relation queries the response was YES. [2024-06-20 16:03:45,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2396 conditions, 457 events. 237/457 cut-off events. For 23542/23542 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1918 event pairs, 47 based on Foata normal form. 10/466 useless extension candidates. Maximal degree in co-relation 2335. Up to 301 conditions per place. [2024-06-20 16:03:45,060 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 64 selfloop transitions, 29 changer transitions 11/106 dead transitions. [2024-06-20 16:03:45,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 106 transitions, 946 flow [2024-06-20 16:03:45,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:03:45,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:03:45,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2024-06-20 16:03:45,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39 [2024-06-20 16:03:45,061 INFO L175 Difference]: Start difference. First operand has 127 places, 87 transitions, 684 flow. Second operand 10 states and 117 transitions. [2024-06-20 16:03:45,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 106 transitions, 946 flow [2024-06-20 16:03:45,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 106 transitions, 867 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-20 16:03:45,078 INFO L231 Difference]: Finished difference. Result has 124 places, 84 transitions, 644 flow [2024-06-20 16:03:45,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=605, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=644, PETRI_PLACES=124, PETRI_TRANSITIONS=84} [2024-06-20 16:03:45,078 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 95 predicate places. [2024-06-20 16:03:45,078 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 84 transitions, 644 flow [2024-06-20 16:03:45,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:45,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:45,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:45,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 16:03:45,079 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)] === [2024-06-20 16:03:45,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:45,079 INFO L85 PathProgramCache]: Analyzing trace with hash 528215300, now seen corresponding path program 12 times [2024-06-20 16:03:45,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:45,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156636678] [2024-06-20 16:03:45,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:45,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:45,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:45,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:45,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:45,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156636678] [2024-06-20 16:03:45,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156636678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:45,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:45,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:03:45,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102027501] [2024-06-20 16:03:45,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:45,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:03:45,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:45,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:03:45,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:03:45,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:45,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 84 transitions, 644 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:45,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:45,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:45,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:46,185 INFO L124 PetriNetUnfolderBase]: 244/480 cut-off events. [2024-06-20 16:03:46,185 INFO L125 PetriNetUnfolderBase]: For 19798/19798 co-relation queries the response was YES. [2024-06-20 16:03:46,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2459 conditions, 480 events. 244/480 cut-off events. For 19798/19798 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2095 event pairs, 51 based on Foata normal form. 8/487 useless extension candidates. Maximal degree in co-relation 2400. Up to 337 conditions per place. [2024-06-20 16:03:46,188 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 73 selfloop transitions, 28 changer transitions 13/116 dead transitions. [2024-06-20 16:03:46,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 116 transitions, 1031 flow [2024-06-20 16:03:46,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:03:46,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:03:46,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-20 16:03:46,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37272727272727274 [2024-06-20 16:03:46,189 INFO L175 Difference]: Start difference. First operand has 124 places, 84 transitions, 644 flow. Second operand 11 states and 123 transitions. [2024-06-20 16:03:46,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 116 transitions, 1031 flow [2024-06-20 16:03:46,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 116 transitions, 951 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-20 16:03:46,207 INFO L231 Difference]: Finished difference. Result has 129 places, 91 transitions, 739 flow [2024-06-20 16:03:46,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=582, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=739, PETRI_PLACES=129, PETRI_TRANSITIONS=91} [2024-06-20 16:03:46,207 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 100 predicate places. [2024-06-20 16:03:46,207 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 91 transitions, 739 flow [2024-06-20 16:03:46,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:46,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:46,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:46,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 16:03:46,208 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)] === [2024-06-20 16:03:46,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:46,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1599586028, now seen corresponding path program 13 times [2024-06-20 16:03:46,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:46,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223924654] [2024-06-20 16:03:46,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:46,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:46,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:46,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:46,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:46,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223924654] [2024-06-20 16:03:46,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223924654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:46,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:46,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:03:46,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518607886] [2024-06-20 16:03:46,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:46,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:03:46,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:46,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:03:46,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:03:47,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:47,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 91 transitions, 739 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:47,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:47,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:47,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:47,322 INFO L124 PetriNetUnfolderBase]: 240/472 cut-off events. [2024-06-20 16:03:47,322 INFO L125 PetriNetUnfolderBase]: For 20388/20388 co-relation queries the response was YES. [2024-06-20 16:03:47,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2459 conditions, 472 events. 240/472 cut-off events. For 20388/20388 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2038 event pairs, 51 based on Foata normal form. 10/481 useless extension candidates. Maximal degree in co-relation 2395. Up to 242 conditions per place. [2024-06-20 16:03:47,325 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 48 selfloop transitions, 49 changer transitions 11/110 dead transitions. [2024-06-20 16:03:47,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 110 transitions, 1009 flow [2024-06-20 16:03:47,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:03:47,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:03:47,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 120 transitions. [2024-06-20 16:03:47,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 16:03:47,329 INFO L175 Difference]: Start difference. First operand has 129 places, 91 transitions, 739 flow. Second operand 10 states and 120 transitions. [2024-06-20 16:03:47,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 110 transitions, 1009 flow [2024-06-20 16:03:47,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 110 transitions, 984 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 16:03:47,350 INFO L231 Difference]: Finished difference. Result has 129 places, 88 transitions, 793 flow [2024-06-20 16:03:47,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=714, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=793, PETRI_PLACES=129, PETRI_TRANSITIONS=88} [2024-06-20 16:03:47,350 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 100 predicate places. [2024-06-20 16:03:47,351 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 88 transitions, 793 flow [2024-06-20 16:03:47,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:47,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:47,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:47,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 16:03:47,351 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)] === [2024-06-20 16:03:47,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:47,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1599590678, now seen corresponding path program 14 times [2024-06-20 16:03:47,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:47,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596611606] [2024-06-20 16:03:47,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:47,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:47,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:48,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:48,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:48,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596611606] [2024-06-20 16:03:48,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596611606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:48,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:48,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:03:48,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030413904] [2024-06-20 16:03:48,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:48,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:03:48,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:48,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:03:48,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:03:48,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:48,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 88 transitions, 793 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:48,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:48,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:48,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:48,430 INFO L124 PetriNetUnfolderBase]: 232/460 cut-off events. [2024-06-20 16:03:48,430 INFO L125 PetriNetUnfolderBase]: For 19086/19086 co-relation queries the response was YES. [2024-06-20 16:03:48,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2474 conditions, 460 events. 232/460 cut-off events. For 19086/19086 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1992 event pairs, 41 based on Foata normal form. 8/467 useless extension candidates. Maximal degree in co-relation 2412. Up to 240 conditions per place. [2024-06-20 16:03:48,433 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 47 selfloop transitions, 43 changer transitions 15/107 dead transitions. [2024-06-20 16:03:48,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 107 transitions, 1055 flow [2024-06-20 16:03:48,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:03:48,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:03:48,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2024-06-20 16:03:48,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39 [2024-06-20 16:03:48,434 INFO L175 Difference]: Start difference. First operand has 129 places, 88 transitions, 793 flow. Second operand 10 states and 117 transitions. [2024-06-20 16:03:48,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 107 transitions, 1055 flow [2024-06-20 16:03:48,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 107 transitions, 953 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-20 16:03:48,451 INFO L231 Difference]: Finished difference. Result has 128 places, 82 transitions, 724 flow [2024-06-20 16:03:48,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=691, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=724, PETRI_PLACES=128, PETRI_TRANSITIONS=82} [2024-06-20 16:03:48,453 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 99 predicate places. [2024-06-20 16:03:48,453 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 82 transitions, 724 flow [2024-06-20 16:03:48,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:48,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:48,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:48,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 16:03:48,454 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)] === [2024-06-20 16:03:48,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:48,454 INFO L85 PathProgramCache]: Analyzing trace with hash 266214320, now seen corresponding path program 1 times [2024-06-20 16:03:48,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:48,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186549879] [2024-06-20 16:03:48,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:48,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:48,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:49,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:49,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:49,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186549879] [2024-06-20 16:03:49,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186549879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:49,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:49,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:03:49,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456398197] [2024-06-20 16:03:49,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:49,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:03:49,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:49,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:03:49,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:03:49,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:49,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 82 transitions, 724 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:49,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:49,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:49,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:49,668 INFO L124 PetriNetUnfolderBase]: 211/417 cut-off events. [2024-06-20 16:03:49,669 INFO L125 PetriNetUnfolderBase]: For 14167/14167 co-relation queries the response was YES. [2024-06-20 16:03:49,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2294 conditions, 417 events. 211/417 cut-off events. For 14167/14167 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1734 event pairs, 43 based on Foata normal form. 2/418 useless extension candidates. Maximal degree in co-relation 2232. Up to 302 conditions per place. [2024-06-20 16:03:49,671 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 69 selfloop transitions, 26 changer transitions 0/97 dead transitions. [2024-06-20 16:03:49,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 97 transitions, 950 flow [2024-06-20 16:03:49,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:03:49,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:03:49,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 117 transitions. [2024-06-20 16:03:49,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35454545454545455 [2024-06-20 16:03:49,672 INFO L175 Difference]: Start difference. First operand has 128 places, 82 transitions, 724 flow. Second operand 11 states and 117 transitions. [2024-06-20 16:03:49,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 97 transitions, 950 flow [2024-06-20 16:03:49,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 97 transitions, 856 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-20 16:03:49,688 INFO L231 Difference]: Finished difference. Result has 125 places, 83 transitions, 694 flow [2024-06-20 16:03:49,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=630, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=694, PETRI_PLACES=125, PETRI_TRANSITIONS=83} [2024-06-20 16:03:49,689 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 96 predicate places. [2024-06-20 16:03:49,689 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 83 transitions, 694 flow [2024-06-20 16:03:49,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:49,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:49,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:49,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 16:03:49,690 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)] === [2024-06-20 16:03:49,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:49,690 INFO L85 PathProgramCache]: Analyzing trace with hash 259539276, now seen corresponding path program 15 times [2024-06-20 16:03:49,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:49,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778554685] [2024-06-20 16:03:49,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:49,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:49,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:50,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:50,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:50,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778554685] [2024-06-20 16:03:50,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778554685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:50,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:50,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:03:50,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921001420] [2024-06-20 16:03:50,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:50,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:03:50,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:50,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:03:50,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:03:50,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:50,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 83 transitions, 694 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:50,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:50,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:50,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:50,930 INFO L124 PetriNetUnfolderBase]: 227/453 cut-off events. [2024-06-20 16:03:50,930 INFO L125 PetriNetUnfolderBase]: For 18375/18375 co-relation queries the response was YES. [2024-06-20 16:03:50,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2336 conditions, 453 events. 227/453 cut-off events. For 18375/18375 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1963 event pairs, 47 based on Foata normal form. 10/462 useless extension candidates. Maximal degree in co-relation 2276. Up to 279 conditions per place. [2024-06-20 16:03:50,932 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 61 selfloop transitions, 28 changer transitions 11/102 dead transitions. [2024-06-20 16:03:50,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 102 transitions, 948 flow [2024-06-20 16:03:50,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:03:50,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:03:50,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 125 transitions. [2024-06-20 16:03:50,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787878787878788 [2024-06-20 16:03:50,933 INFO L175 Difference]: Start difference. First operand has 125 places, 83 transitions, 694 flow. Second operand 11 states and 125 transitions. [2024-06-20 16:03:50,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 102 transitions, 948 flow [2024-06-20 16:03:50,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 102 transitions, 858 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-20 16:03:50,950 INFO L231 Difference]: Finished difference. Result has 124 places, 80 transitions, 642 flow [2024-06-20 16:03:50,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=604, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=642, PETRI_PLACES=124, PETRI_TRANSITIONS=80} [2024-06-20 16:03:50,950 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 95 predicate places. [2024-06-20 16:03:50,951 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 80 transitions, 642 flow [2024-06-20 16:03:50,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:50,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:50,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:50,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 16:03:50,951 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)] === [2024-06-20 16:03:50,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:50,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1867849808, now seen corresponding path program 16 times [2024-06-20 16:03:50,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:50,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120958200] [2024-06-20 16:03:50,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:50,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:50,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:51,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:51,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:51,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120958200] [2024-06-20 16:03:51,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120958200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:51,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:51,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:03:51,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607742752] [2024-06-20 16:03:51,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:51,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:03:51,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:51,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:03:51,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:03:51,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:51,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 80 transitions, 642 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:51,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:51,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:51,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:52,203 INFO L124 PetriNetUnfolderBase]: 215/433 cut-off events. [2024-06-20 16:03:52,203 INFO L125 PetriNetUnfolderBase]: For 17985/17985 co-relation queries the response was YES. [2024-06-20 16:03:52,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2242 conditions, 433 events. 215/433 cut-off events. For 17985/17985 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1848 event pairs, 39 based on Foata normal form. 8/440 useless extension candidates. Maximal degree in co-relation 2183. Up to 269 conditions per place. [2024-06-20 16:03:52,205 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 58 selfloop transitions, 23 changer transitions 15/98 dead transitions. [2024-06-20 16:03:52,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 98 transitions, 882 flow [2024-06-20 16:03:52,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:03:52,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:03:52,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2024-06-20 16:03:52,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3696969696969697 [2024-06-20 16:03:52,205 INFO L175 Difference]: Start difference. First operand has 124 places, 80 transitions, 642 flow. Second operand 11 states and 122 transitions. [2024-06-20 16:03:52,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 98 transitions, 882 flow [2024-06-20 16:03:52,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 98 transitions, 822 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 16:03:52,225 INFO L231 Difference]: Finished difference. Result has 122 places, 74 transitions, 579 flow [2024-06-20 16:03:52,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=582, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=579, PETRI_PLACES=122, PETRI_TRANSITIONS=74} [2024-06-20 16:03:52,226 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 93 predicate places. [2024-06-20 16:03:52,226 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 74 transitions, 579 flow [2024-06-20 16:03:52,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:52,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:52,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:52,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 16:03:52,226 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)] === [2024-06-20 16:03:52,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:52,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1330433136, now seen corresponding path program 2 times [2024-06-20 16:03:52,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:52,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748657917] [2024-06-20 16:03:52,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:52,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:52,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:53,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:53,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:53,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748657917] [2024-06-20 16:03:53,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748657917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:53,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:53,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:03:53,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716414571] [2024-06-20 16:03:53,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:53,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:03:53,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:53,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:03:53,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:03:53,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:53,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 74 transitions, 579 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:53,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:53,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:53,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:53,450 INFO L124 PetriNetUnfolderBase]: 202/402 cut-off events. [2024-06-20 16:03:53,450 INFO L125 PetriNetUnfolderBase]: For 13248/13248 co-relation queries the response was YES. [2024-06-20 16:03:53,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2127 conditions, 402 events. 202/402 cut-off events. For 13248/13248 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1651 event pairs, 54 based on Foata normal form. 2/403 useless extension candidates. Maximal degree in co-relation 2069. Up to 343 conditions per place. [2024-06-20 16:03:53,452 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 69 selfloop transitions, 22 changer transitions 0/93 dead transitions. [2024-06-20 16:03:53,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 93 transitions, 826 flow [2024-06-20 16:03:53,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:03:53,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:03:53,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 129 transitions. [2024-06-20 16:03:53,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35833333333333334 [2024-06-20 16:03:53,453 INFO L175 Difference]: Start difference. First operand has 122 places, 74 transitions, 579 flow. Second operand 12 states and 129 transitions. [2024-06-20 16:03:53,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 93 transitions, 826 flow [2024-06-20 16:03:53,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 93 transitions, 744 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-20 16:03:53,469 INFO L231 Difference]: Finished difference. Result has 115 places, 77 transitions, 578 flow [2024-06-20 16:03:53,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=505, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=578, PETRI_PLACES=115, PETRI_TRANSITIONS=77} [2024-06-20 16:03:53,470 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 86 predicate places. [2024-06-20 16:03:53,470 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 77 transitions, 578 flow [2024-06-20 16:03:53,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:53,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:53,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:53,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 16:03:53,470 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:03:53,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:53,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1157036686, now seen corresponding path program 17 times [2024-06-20 16:03:53,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:53,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215817723] [2024-06-20 16:03:53,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:53,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:53,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:54,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:54,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:54,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215817723] [2024-06-20 16:03:54,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215817723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:54,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:54,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:03:54,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947389848] [2024-06-20 16:03:54,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:54,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:03:54,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:54,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:03:54,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:03:54,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:54,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 77 transitions, 578 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:54,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:54,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:54,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:54,853 INFO L124 PetriNetUnfolderBase]: 232/468 cut-off events. [2024-06-20 16:03:54,853 INFO L125 PetriNetUnfolderBase]: For 18539/18539 co-relation queries the response was YES. [2024-06-20 16:03:54,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2231 conditions, 468 events. 232/468 cut-off events. For 18539/18539 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2056 event pairs, 62 based on Foata normal form. 16/483 useless extension candidates. Maximal degree in co-relation 2177. Up to 335 conditions per place. [2024-06-20 16:03:54,855 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 65 selfloop transitions, 18 changer transitions 16/101 dead transitions. [2024-06-20 16:03:54,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 101 transitions, 852 flow [2024-06-20 16:03:54,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 16:03:54,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 16:03:54,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 143 transitions. [2024-06-20 16:03:54,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-20 16:03:54,856 INFO L175 Difference]: Start difference. First operand has 115 places, 77 transitions, 578 flow. Second operand 13 states and 143 transitions. [2024-06-20 16:03:54,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 101 transitions, 852 flow [2024-06-20 16:03:54,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 101 transitions, 792 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-20 16:03:54,872 INFO L231 Difference]: Finished difference. Result has 119 places, 73 transitions, 534 flow [2024-06-20 16:03:54,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=534, PETRI_PLACES=119, PETRI_TRANSITIONS=73} [2024-06-20 16:03:54,873 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 90 predicate places. [2024-06-20 16:03:54,873 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 73 transitions, 534 flow [2024-06-20 16:03:54,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:54,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:54,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:54,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 16:03:54,873 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:03:54,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:54,873 INFO L85 PathProgramCache]: Analyzing trace with hash -672290020, now seen corresponding path program 18 times [2024-06-20 16:03:54,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:54,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123740188] [2024-06-20 16:03:54,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:54,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:54,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:55,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:55,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:55,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123740188] [2024-06-20 16:03:55,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123740188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:55,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:55,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:03:55,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732951171] [2024-06-20 16:03:55,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:55,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:03:55,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:55,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:03:55,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:03:55,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:55,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 73 transitions, 534 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:55,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:55,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:55,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:56,167 INFO L124 PetriNetUnfolderBase]: 204/416 cut-off events. [2024-06-20 16:03:56,167 INFO L125 PetriNetUnfolderBase]: For 16279/16279 co-relation queries the response was YES. [2024-06-20 16:03:56,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2040 conditions, 416 events. 204/416 cut-off events. For 16279/16279 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1756 event pairs, 52 based on Foata normal form. 10/425 useless extension candidates. Maximal degree in co-relation 1985. Up to 298 conditions per place. [2024-06-20 16:03:56,170 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 59 selfloop transitions, 22 changer transitions 11/94 dead transitions. [2024-06-20 16:03:56,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 94 transitions, 776 flow [2024-06-20 16:03:56,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:03:56,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:03:56,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-06-20 16:03:56,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39090909090909093 [2024-06-20 16:03:56,171 INFO L175 Difference]: Start difference. First operand has 119 places, 73 transitions, 534 flow. Second operand 11 states and 129 transitions. [2024-06-20 16:03:56,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 94 transitions, 776 flow [2024-06-20 16:03:56,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 94 transitions, 730 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-20 16:03:56,188 INFO L231 Difference]: Finished difference. Result has 113 places, 70 transitions, 513 flow [2024-06-20 16:03:56,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=513, PETRI_PLACES=113, PETRI_TRANSITIONS=70} [2024-06-20 16:03:56,188 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 84 predicate places. [2024-06-20 16:03:56,188 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 70 transitions, 513 flow [2024-06-20 16:03:56,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:56,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:56,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:56,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 16:03:56,188 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:03:56,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:56,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1689394758, now seen corresponding path program 3 times [2024-06-20 16:03:56,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:56,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046336741] [2024-06-20 16:03:56,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:56,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:56,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:57,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:57,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:57,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046336741] [2024-06-20 16:03:57,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046336741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:57,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:57,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:03:57,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313547167] [2024-06-20 16:03:57,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:57,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:03:57,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:57,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:03:57,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:03:57,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:57,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 70 transitions, 513 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:57,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:57,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:57,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:57,599 INFO L124 PetriNetUnfolderBase]: 243/501 cut-off events. [2024-06-20 16:03:57,599 INFO L125 PetriNetUnfolderBase]: For 23932/23932 co-relation queries the response was YES. [2024-06-20 16:03:57,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2820 conditions, 501 events. 243/501 cut-off events. For 23932/23932 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2283 event pairs, 81 based on Foata normal form. 8/508 useless extension candidates. Maximal degree in co-relation 2767. Up to 297 conditions per place. [2024-06-20 16:03:57,601 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 67 selfloop transitions, 18 changer transitions 10/97 dead transitions. [2024-06-20 16:03:57,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 97 transitions, 855 flow [2024-06-20 16:03:57,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 16:03:57,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 16:03:57,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 145 transitions. [2024-06-20 16:03:57,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3717948717948718 [2024-06-20 16:03:57,602 INFO L175 Difference]: Start difference. First operand has 113 places, 70 transitions, 513 flow. Second operand 13 states and 145 transitions. [2024-06-20 16:03:57,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 97 transitions, 855 flow [2024-06-20 16:03:57,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 97 transitions, 803 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-20 16:03:57,618 INFO L231 Difference]: Finished difference. Result has 113 places, 67 transitions, 486 flow [2024-06-20 16:03:57,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=465, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=486, PETRI_PLACES=113, PETRI_TRANSITIONS=67} [2024-06-20 16:03:57,618 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 84 predicate places. [2024-06-20 16:03:57,618 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 67 transitions, 486 flow [2024-06-20 16:03:57,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:57,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:57,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:57,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 16:03:57,619 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:03:57,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:57,619 INFO L85 PathProgramCache]: Analyzing trace with hash -672294670, now seen corresponding path program 19 times [2024-06-20 16:03:57,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:57,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113751070] [2024-06-20 16:03:57,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:57,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:57,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:58,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:58,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:58,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113751070] [2024-06-20 16:03:58,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113751070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:58,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:58,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:03:58,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176647690] [2024-06-20 16:03:58,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:58,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:03:58,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:58,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:03:58,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:03:58,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:03:58,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 67 transitions, 486 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:58,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:58,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:03:58,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:59,058 INFO L124 PetriNetUnfolderBase]: 235/485 cut-off events. [2024-06-20 16:03:59,058 INFO L125 PetriNetUnfolderBase]: For 22473/22473 co-relation queries the response was YES. [2024-06-20 16:03:59,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2721 conditions, 485 events. 235/485 cut-off events. For 22473/22473 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2195 event pairs, 81 based on Foata normal form. 8/492 useless extension candidates. Maximal degree in co-relation 2669. Up to 284 conditions per place. [2024-06-20 16:03:59,060 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 65 selfloop transitions, 16 changer transitions 8/91 dead transitions. [2024-06-20 16:03:59,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 91 transitions, 808 flow [2024-06-20 16:03:59,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:03:59,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:03:59,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2024-06-20 16:03:59,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38484848484848483 [2024-06-20 16:03:59,062 INFO L175 Difference]: Start difference. First operand has 113 places, 67 transitions, 486 flow. Second operand 11 states and 127 transitions. [2024-06-20 16:03:59,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 91 transitions, 808 flow [2024-06-20 16:03:59,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 91 transitions, 754 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-20 16:03:59,078 INFO L231 Difference]: Finished difference. Result has 108 places, 64 transitions, 451 flow [2024-06-20 16:03:59,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=451, PETRI_PLACES=108, PETRI_TRANSITIONS=64} [2024-06-20 16:03:59,078 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 79 predicate places. [2024-06-20 16:03:59,079 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 64 transitions, 451 flow [2024-06-20 16:03:59,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:59,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:59,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:59,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 16:03:59,079 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:03:59,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:59,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1695896822, now seen corresponding path program 20 times [2024-06-20 16:03:59,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:59,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720178046] [2024-06-20 16:03:59,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:59,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:59,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:59,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:59,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:59,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720178046] [2024-06-20 16:03:59,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720178046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:59,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:59,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:03:59,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782109922] [2024-06-20 16:03:59,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:59,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:03:59,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:59,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:03:59,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:04:00,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:04:00,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 64 transitions, 451 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:00,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:00,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:04:00,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:00,395 INFO L124 PetriNetUnfolderBase]: 203/421 cut-off events. [2024-06-20 16:04:00,396 INFO L125 PetriNetUnfolderBase]: For 17296/17296 co-relation queries the response was YES. [2024-06-20 16:04:00,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2171 conditions, 421 events. 203/421 cut-off events. For 17296/17296 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1799 event pairs, 74 based on Foata normal form. 10/430 useless extension candidates. Maximal degree in co-relation 2121. Up to 332 conditions per place. [2024-06-20 16:04:00,398 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 55 selfloop transitions, 14 changer transitions 11/82 dead transitions. [2024-06-20 16:04:00,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 82 transitions, 663 flow [2024-06-20 16:04:00,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:04:00,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:04:00,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 120 transitions. [2024-06-20 16:04:00,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-20 16:04:00,399 INFO L175 Difference]: Start difference. First operand has 108 places, 64 transitions, 451 flow. Second operand 11 states and 120 transitions. [2024-06-20 16:04:00,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 82 transitions, 663 flow [2024-06-20 16:04:00,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 82 transitions, 630 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 16:04:00,411 INFO L231 Difference]: Finished difference. Result has 106 places, 61 transitions, 423 flow [2024-06-20 16:04:00,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=423, PETRI_PLACES=106, PETRI_TRANSITIONS=61} [2024-06-20 16:04:00,412 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 77 predicate places. [2024-06-20 16:04:00,412 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 61 transitions, 423 flow [2024-06-20 16:04:00,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:00,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:00,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:00,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 16:04:00,413 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:04:00,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:00,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1695889878, now seen corresponding path program 4 times [2024-06-20 16:04:00,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:00,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764224510] [2024-06-20 16:04:00,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:00,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:00,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:01,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:01,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:01,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764224510] [2024-06-20 16:04:01,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764224510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:01,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:01,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:04:01,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479338461] [2024-06-20 16:04:01,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:01,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:04:01,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:01,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:04:01,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:04:01,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:04:01,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 61 transitions, 423 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:01,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:01,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:04:01,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:01,545 INFO L124 PetriNetUnfolderBase]: 167/353 cut-off events. [2024-06-20 16:04:01,545 INFO L125 PetriNetUnfolderBase]: For 11745/11745 co-relation queries the response was YES. [2024-06-20 16:04:01,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1682 conditions, 353 events. 167/353 cut-off events. For 11745/11745 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1433 event pairs, 60 based on Foata normal form. 8/360 useless extension candidates. Maximal degree in co-relation 1633. Up to 284 conditions per place. [2024-06-20 16:04:01,547 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 51 selfloop transitions, 9 changer transitions 14/76 dead transitions. [2024-06-20 16:04:01,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 76 transitions, 613 flow [2024-06-20 16:04:01,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:04:01,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:04:01,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 108 transitions. [2024-06-20 16:04:01,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36 [2024-06-20 16:04:01,547 INFO L175 Difference]: Start difference. First operand has 106 places, 61 transitions, 423 flow. Second operand 10 states and 108 transitions. [2024-06-20 16:04:01,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 76 transitions, 613 flow [2024-06-20 16:04:01,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 76 transitions, 581 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 16:04:01,557 INFO L231 Difference]: Finished difference. Result has 103 places, 56 transitions, 381 flow [2024-06-20 16:04:01,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=381, PETRI_PLACES=103, PETRI_TRANSITIONS=56} [2024-06-20 16:04:01,558 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 74 predicate places. [2024-06-20 16:04:01,558 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 56 transitions, 381 flow [2024-06-20 16:04:01,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:01,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:01,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:01,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 16:04:01,558 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:04:01,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:01,558 INFO L85 PathProgramCache]: Analyzing trace with hash -695941922, now seen corresponding path program 5 times [2024-06-20 16:04:01,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:01,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513947606] [2024-06-20 16:04:01,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:01,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:01,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:02,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:02,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:02,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513947606] [2024-06-20 16:04:02,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513947606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:02,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:02,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:04:02,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868517461] [2024-06-20 16:04:02,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:02,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:04:02,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:02,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:04:02,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:04:02,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:04:02,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 56 transitions, 381 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:02,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:02,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:04:02,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:02,743 INFO L124 PetriNetUnfolderBase]: 152/316 cut-off events. [2024-06-20 16:04:02,743 INFO L125 PetriNetUnfolderBase]: For 8529/8529 co-relation queries the response was YES. [2024-06-20 16:04:02,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1547 conditions, 316 events. 152/316 cut-off events. For 8529/8529 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1212 event pairs, 52 based on Foata normal form. 2/317 useless extension candidates. Maximal degree in co-relation 1499. Up to 275 conditions per place. [2024-06-20 16:04:02,744 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 54 selfloop transitions, 13 changer transitions 0/69 dead transitions. [2024-06-20 16:04:02,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 69 transitions, 549 flow [2024-06-20 16:04:02,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:04:02,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:04:02,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 104 transitions. [2024-06-20 16:04:02,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3466666666666667 [2024-06-20 16:04:02,745 INFO L175 Difference]: Start difference. First operand has 103 places, 56 transitions, 381 flow. Second operand 10 states and 104 transitions. [2024-06-20 16:04:02,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 69 transitions, 549 flow [2024-06-20 16:04:02,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 69 transitions, 523 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-20 16:04:02,753 INFO L231 Difference]: Finished difference. Result has 94 places, 57 transitions, 395 flow [2024-06-20 16:04:02,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=395, PETRI_PLACES=94, PETRI_TRANSITIONS=57} [2024-06-20 16:04:02,754 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 65 predicate places. [2024-06-20 16:04:02,754 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 57 transitions, 395 flow [2024-06-20 16:04:02,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:02,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:02,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:02,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 16:04:02,754 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:04:02,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:02,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1371761344, now seen corresponding path program 21 times [2024-06-20 16:04:02,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:02,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469217367] [2024-06-20 16:04:02,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:02,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:02,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:03,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:03,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:03,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469217367] [2024-06-20 16:04:03,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469217367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:03,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:03,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:04:03,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214609613] [2024-06-20 16:04:03,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:03,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:04:03,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:03,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:04:03,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:04:03,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:04:03,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 57 transitions, 395 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:03,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:03,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:04:03,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:03,889 INFO L124 PetriNetUnfolderBase]: 168/352 cut-off events. [2024-06-20 16:04:03,889 INFO L125 PetriNetUnfolderBase]: For 9601/9601 co-relation queries the response was YES. [2024-06-20 16:04:03,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1612 conditions, 352 events. 168/352 cut-off events. For 9601/9601 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1436 event pairs, 46 based on Foata normal form. 10/361 useless extension candidates. Maximal degree in co-relation 1567. Up to 244 conditions per place. [2024-06-20 16:04:03,891 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 45 selfloop transitions, 19 changer transitions 11/77 dead transitions. [2024-06-20 16:04:03,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 77 transitions, 601 flow [2024-06-20 16:04:03,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:04:03,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:04:03,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-20 16:04:03,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37272727272727274 [2024-06-20 16:04:03,891 INFO L175 Difference]: Start difference. First operand has 94 places, 57 transitions, 395 flow. Second operand 11 states and 123 transitions. [2024-06-20 16:04:03,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 77 transitions, 601 flow [2024-06-20 16:04:03,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 77 transitions, 571 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-20 16:04:03,900 INFO L231 Difference]: Finished difference. Result has 97 places, 54 transitions, 386 flow [2024-06-20 16:04:03,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=386, PETRI_PLACES=97, PETRI_TRANSITIONS=54} [2024-06-20 16:04:03,901 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 68 predicate places. [2024-06-20 16:04:03,901 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 54 transitions, 386 flow [2024-06-20 16:04:03,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:03,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:03,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:03,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 16:04:03,901 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:04:03,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:03,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1049269204, now seen corresponding path program 6 times [2024-06-20 16:04:03,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:03,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003373808] [2024-06-20 16:04:03,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:03,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:03,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:04,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:04,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:04,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003373808] [2024-06-20 16:04:04,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003373808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:04,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:04,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:04:04,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865239954] [2024-06-20 16:04:04,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:04,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:04:04,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:04,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:04:04,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:04:04,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:04:04,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 54 transitions, 386 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:04,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:04,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:04:04,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:05,173 INFO L124 PetriNetUnfolderBase]: 148/312 cut-off events. [2024-06-20 16:04:05,173 INFO L125 PetriNetUnfolderBase]: For 7490/7490 co-relation queries the response was YES. [2024-06-20 16:04:05,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1519 conditions, 312 events. 148/312 cut-off events. For 7490/7490 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1198 event pairs, 50 based on Foata normal form. 2/313 useless extension candidates. Maximal degree in co-relation 1473. Up to 269 conditions per place. [2024-06-20 16:04:05,174 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 50 selfloop transitions, 16 changer transitions 0/68 dead transitions. [2024-06-20 16:04:05,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 68 transitions, 556 flow [2024-06-20 16:04:05,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:04:05,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:04:05,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 113 transitions. [2024-06-20 16:04:05,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3424242424242424 [2024-06-20 16:04:05,175 INFO L175 Difference]: Start difference. First operand has 97 places, 54 transitions, 386 flow. Second operand 11 states and 113 transitions. [2024-06-20 16:04:05,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 68 transitions, 556 flow [2024-06-20 16:04:05,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 68 transitions, 514 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 16:04:05,182 INFO L231 Difference]: Finished difference. Result has 95 places, 55 transitions, 392 flow [2024-06-20 16:04:05,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=392, PETRI_PLACES=95, PETRI_TRANSITIONS=55} [2024-06-20 16:04:05,183 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 66 predicate places. [2024-06-20 16:04:05,183 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 55 transitions, 392 flow [2024-06-20 16:04:05,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:05,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:05,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:05,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 16:04:05,183 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:04:05,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:05,184 INFO L85 PathProgramCache]: Analyzing trace with hash 553683988, now seen corresponding path program 22 times [2024-06-20 16:04:05,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:05,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811343456] [2024-06-20 16:04:05,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:05,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:05,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:05,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:05,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:05,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811343456] [2024-06-20 16:04:05,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811343456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:05,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:06,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:04:06,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663272254] [2024-06-20 16:04:06,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:06,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:04:06,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:06,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:04:06,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:04:06,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:04:06,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 55 transitions, 392 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:06,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:06,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:04:06,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:06,438 INFO L124 PetriNetUnfolderBase]: 182/386 cut-off events. [2024-06-20 16:04:06,439 INFO L125 PetriNetUnfolderBase]: For 11610/11610 co-relation queries the response was YES. [2024-06-20 16:04:06,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1909 conditions, 386 events. 182/386 cut-off events. For 11610/11610 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1626 event pairs, 70 based on Foata normal form. 8/393 useless extension candidates. Maximal degree in co-relation 1864. Up to 223 conditions per place. [2024-06-20 16:04:06,440 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 52 selfloop transitions, 16 changer transitions 9/79 dead transitions. [2024-06-20 16:04:06,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 79 transitions, 672 flow [2024-06-20 16:04:06,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:04:06,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:04:06,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 125 transitions. [2024-06-20 16:04:06,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787878787878788 [2024-06-20 16:04:06,441 INFO L175 Difference]: Start difference. First operand has 95 places, 55 transitions, 392 flow. Second operand 11 states and 125 transitions. [2024-06-20 16:04:06,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 79 transitions, 672 flow [2024-06-20 16:04:06,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 79 transitions, 628 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-20 16:04:06,449 INFO L231 Difference]: Finished difference. Result has 96 places, 51 transitions, 356 flow [2024-06-20 16:04:06,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=356, PETRI_PLACES=96, PETRI_TRANSITIONS=51} [2024-06-20 16:04:06,449 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 67 predicate places. [2024-06-20 16:04:06,450 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 51 transitions, 356 flow [2024-06-20 16:04:06,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:06,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:06,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:06,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 16:04:06,450 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:04:06,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:06,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1049260834, now seen corresponding path program 7 times [2024-06-20 16:04:06,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:06,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365904071] [2024-06-20 16:04:06,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:06,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:06,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:07,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:07,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:07,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365904071] [2024-06-20 16:04:07,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365904071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:07,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:07,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:04:07,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318191999] [2024-06-20 16:04:07,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:07,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:04:07,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:07,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:04:07,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:04:07,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:04:07,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 51 transitions, 356 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:07,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:07,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:04:07,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:07,787 INFO L124 PetriNetUnfolderBase]: 166/350 cut-off events. [2024-06-20 16:04:07,787 INFO L125 PetriNetUnfolderBase]: For 10309/10309 co-relation queries the response was YES. [2024-06-20 16:04:07,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1824 conditions, 350 events. 166/350 cut-off events. For 10309/10309 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1407 event pairs, 70 based on Foata normal form. 2/351 useless extension candidates. Maximal degree in co-relation 1779. Up to 293 conditions per place. [2024-06-20 16:04:07,789 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 47 selfloop transitions, 16 changer transitions 0/65 dead transitions. [2024-06-20 16:04:07,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 65 transitions, 522 flow [2024-06-20 16:04:07,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:04:07,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:04:07,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 107 transitions. [2024-06-20 16:04:07,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3566666666666667 [2024-06-20 16:04:07,789 INFO L175 Difference]: Start difference. First operand has 96 places, 51 transitions, 356 flow. Second operand 10 states and 107 transitions. [2024-06-20 16:04:07,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 65 transitions, 522 flow [2024-06-20 16:04:07,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 65 transitions, 484 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-20 16:04:07,798 INFO L231 Difference]: Finished difference. Result has 90 places, 52 transitions, 368 flow [2024-06-20 16:04:07,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=368, PETRI_PLACES=90, PETRI_TRANSITIONS=52} [2024-06-20 16:04:07,798 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 61 predicate places. [2024-06-20 16:04:07,798 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 52 transitions, 368 flow [2024-06-20 16:04:07,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:07,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:07,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:07,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 16:04:07,799 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:04:07,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:07,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1708285882, now seen corresponding path program 8 times [2024-06-20 16:04:07,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:07,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513764469] [2024-06-20 16:04:07,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:07,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:07,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:08,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:08,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:08,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513764469] [2024-06-20 16:04:08,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513764469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:08,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:08,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:04:08,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81432923] [2024-06-20 16:04:08,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:08,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:04:08,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:08,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:04:08,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:04:08,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:04:08,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 52 transitions, 368 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:08,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:08,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:04:08,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:08,987 INFO L124 PetriNetUnfolderBase]: 163/345 cut-off events. [2024-06-20 16:04:08,987 INFO L125 PetriNetUnfolderBase]: For 7669/7669 co-relation queries the response was YES. [2024-06-20 16:04:08,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1691 conditions, 345 events. 163/345 cut-off events. For 7669/7669 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1390 event pairs, 67 based on Foata normal form. 2/346 useless extension candidates. Maximal degree in co-relation 1649. Up to 302 conditions per place. [2024-06-20 16:04:08,988 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 50 selfloop transitions, 13 changer transitions 0/65 dead transitions. [2024-06-20 16:04:08,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 65 transitions, 522 flow [2024-06-20 16:04:08,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:04:08,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:04:08,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 103 transitions. [2024-06-20 16:04:08,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3433333333333333 [2024-06-20 16:04:08,989 INFO L175 Difference]: Start difference. First operand has 90 places, 52 transitions, 368 flow. Second operand 10 states and 103 transitions. [2024-06-20 16:04:08,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 65 transitions, 522 flow [2024-06-20 16:04:08,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 65 transitions, 482 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-20 16:04:08,997 INFO L231 Difference]: Finished difference. Result has 92 places, 52 transitions, 358 flow [2024-06-20 16:04:08,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=82, 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=10, PETRI_FLOW=358, PETRI_PLACES=92, PETRI_TRANSITIONS=52} [2024-06-20 16:04:08,997 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 63 predicate places. [2024-06-20 16:04:08,997 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 52 transitions, 358 flow [2024-06-20 16:04:08,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:08,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:08,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:08,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 16:04:08,998 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:04:08,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:08,998 INFO L85 PathProgramCache]: Analyzing trace with hash -2003751036, now seen corresponding path program 23 times [2024-06-20 16:04:08,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:08,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345883591] [2024-06-20 16:04:08,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:08,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:09,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:09,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:09,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:09,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345883591] [2024-06-20 16:04:09,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345883591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:09,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:09,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:04:09,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703597674] [2024-06-20 16:04:09,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:09,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:04:09,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:09,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:04:09,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:04:10,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:04:10,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 52 transitions, 358 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:10,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:10,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:04:10,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:10,381 INFO L124 PetriNetUnfolderBase]: 158/342 cut-off events. [2024-06-20 16:04:10,381 INFO L125 PetriNetUnfolderBase]: For 9493/9493 co-relation queries the response was YES. [2024-06-20 16:04:10,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1434 conditions, 342 events. 158/342 cut-off events. For 9493/9493 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1395 event pairs, 68 based on Foata normal form. 16/357 useless extension candidates. Maximal degree in co-relation 1391. Up to 225 conditions per place. [2024-06-20 16:04:10,382 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 42 selfloop transitions, 11 changer transitions 16/71 dead transitions. [2024-06-20 16:04:10,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 71 transitions, 550 flow [2024-06-20 16:04:10,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:04:10,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:04:10,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 120 transitions. [2024-06-20 16:04:10,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-20 16:04:10,383 INFO L175 Difference]: Start difference. First operand has 92 places, 52 transitions, 358 flow. Second operand 11 states and 120 transitions. [2024-06-20 16:04:10,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 71 transitions, 550 flow [2024-06-20 16:04:10,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 71 transitions, 501 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-20 16:04:10,391 INFO L231 Difference]: Finished difference. Result has 94 places, 46 transitions, 296 flow [2024-06-20 16:04:10,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=296, PETRI_PLACES=94, PETRI_TRANSITIONS=46} [2024-06-20 16:04:10,391 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 65 predicate places. [2024-06-20 16:04:10,391 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 46 transitions, 296 flow [2024-06-20 16:04:10,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:10,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:10,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:10,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 16:04:10,392 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:04:10,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:10,392 INFO L85 PathProgramCache]: Analyzing trace with hash -114061696, now seen corresponding path program 24 times [2024-06-20 16:04:10,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:10,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557900350] [2024-06-20 16:04:10,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:10,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:10,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:11,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:11,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:11,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557900350] [2024-06-20 16:04:11,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557900350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:11,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:11,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:04:11,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294852963] [2024-06-20 16:04:11,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:11,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:04:11,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:11,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:04:11,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:04:11,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:04:11,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 46 transitions, 296 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:11,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:11,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:04:11,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:11,578 INFO L124 PetriNetUnfolderBase]: 104/236 cut-off events. [2024-06-20 16:04:11,578 INFO L125 PetriNetUnfolderBase]: For 4792/4792 co-relation queries the response was YES. [2024-06-20 16:04:11,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 875 conditions, 236 events. 104/236 cut-off events. For 4792/4792 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 848 event pairs, 31 based on Foata normal form. 8/243 useless extension candidates. Maximal degree in co-relation 831. Up to 116 conditions per place. [2024-06-20 16:04:11,579 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 37 selfloop transitions, 12 changer transitions 15/66 dead transitions. [2024-06-20 16:04:11,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 66 transitions, 474 flow [2024-06-20 16:04:11,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:04:11,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:04:11,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 119 transitions. [2024-06-20 16:04:11,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3606060606060606 [2024-06-20 16:04:11,579 INFO L175 Difference]: Start difference. First operand has 94 places, 46 transitions, 296 flow. Second operand 11 states and 119 transitions. [2024-06-20 16:04:11,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 66 transitions, 474 flow [2024-06-20 16:04:11,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 66 transitions, 434 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-20 16:04:11,586 INFO L231 Difference]: Finished difference. Result has 86 places, 40 transitions, 247 flow [2024-06-20 16:04:11,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=247, PETRI_PLACES=86, PETRI_TRANSITIONS=40} [2024-06-20 16:04:11,586 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 57 predicate places. [2024-06-20 16:04:11,586 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 40 transitions, 247 flow [2024-06-20 16:04:11,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:11,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:11,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:11,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 16:04:11,586 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:04:11,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:11,587 INFO L85 PathProgramCache]: Analyzing trace with hash 260156343, now seen corresponding path program 1 times [2024-06-20 16:04:11,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:11,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326120307] [2024-06-20 16:04:11,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:11,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:11,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:12,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:12,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:12,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326120307] [2024-06-20 16:04:12,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326120307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:12,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:12,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 16:04:12,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989212912] [2024-06-20 16:04:12,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:12,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 16:04:12,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:12,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 16:04:12,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-20 16:04:12,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:04:12,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 40 transitions, 247 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:12,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:12,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:04:12,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:13,185 INFO L124 PetriNetUnfolderBase]: 91/209 cut-off events. [2024-06-20 16:04:13,186 INFO L125 PetriNetUnfolderBase]: For 3293/3293 co-relation queries the response was YES. [2024-06-20 16:04:13,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 754 conditions, 209 events. 91/209 cut-off events. For 3293/3293 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 709 event pairs, 25 based on Foata normal form. 6/214 useless extension candidates. Maximal degree in co-relation 714. Up to 110 conditions per place. [2024-06-20 16:04:13,186 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 26 selfloop transitions, 5 changer transitions 24/57 dead transitions. [2024-06-20 16:04:13,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 57 transitions, 397 flow [2024-06-20 16:04:13,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:04:13,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:04:13,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 113 transitions. [2024-06-20 16:04:13,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3424242424242424 [2024-06-20 16:04:13,187 INFO L175 Difference]: Start difference. First operand has 86 places, 40 transitions, 247 flow. Second operand 11 states and 113 transitions. [2024-06-20 16:04:13,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 57 transitions, 397 flow [2024-06-20 16:04:13,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 57 transitions, 350 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-20 16:04:13,190 INFO L231 Difference]: Finished difference. Result has 75 places, 30 transitions, 163 flow [2024-06-20 16:04:13,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=163, PETRI_PLACES=75, PETRI_TRANSITIONS=30} [2024-06-20 16:04:13,190 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 46 predicate places. [2024-06-20 16:04:13,190 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 30 transitions, 163 flow [2024-06-20 16:04:13,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:13,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:13,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:13,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 16:04:13,191 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:04:13,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:13,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1030655749, now seen corresponding path program 2 times [2024-06-20 16:04:13,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:13,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640203452] [2024-06-20 16:04:13,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:13,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:13,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:14,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:14,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:14,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640203452] [2024-06-20 16:04:14,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640203452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:14,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:14,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 16:04:14,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458038336] [2024-06-20 16:04:14,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:14,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 16:04:14,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:14,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 16:04:14,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-20 16:04:14,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:04:14,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 30 transitions, 163 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:14,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:14,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:04:14,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:14,817 INFO L124 PetriNetUnfolderBase]: 68/153 cut-off events. [2024-06-20 16:04:14,817 INFO L125 PetriNetUnfolderBase]: For 2184/2184 co-relation queries the response was YES. [2024-06-20 16:04:14,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530 conditions, 153 events. 68/153 cut-off events. For 2184/2184 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 442 event pairs, 21 based on Foata normal form. 6/159 useless extension candidates. Maximal degree in co-relation 497. Up to 92 conditions per place. [2024-06-20 16:04:14,818 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 21 selfloop transitions, 5 changer transitions 16/44 dead transitions. [2024-06-20 16:04:14,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 44 transitions, 277 flow [2024-06-20 16:04:14,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:04:14,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:04:14,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 105 transitions. [2024-06-20 16:04:14,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2024-06-20 16:04:14,818 INFO L175 Difference]: Start difference. First operand has 75 places, 30 transitions, 163 flow. Second operand 11 states and 105 transitions. [2024-06-20 16:04:14,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 44 transitions, 277 flow [2024-06-20 16:04:14,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 44 transitions, 243 flow, removed 6 selfloop flow, removed 14 redundant places. [2024-06-20 16:04:14,820 INFO L231 Difference]: Finished difference. Result has 59 places, 25 transitions, 120 flow [2024-06-20 16:04:14,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=120, PETRI_PLACES=59, PETRI_TRANSITIONS=25} [2024-06-20 16:04:14,820 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 30 predicate places. [2024-06-20 16:04:14,820 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 25 transitions, 120 flow [2024-06-20 16:04:14,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:14,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:14,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:14,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 16:04:14,821 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:04:14,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:14,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1832653343, now seen corresponding path program 3 times [2024-06-20 16:04:14,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:14,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473439321] [2024-06-20 16:04:14,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:14,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:14,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:15,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:15,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:15,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473439321] [2024-06-20 16:04:15,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473439321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:15,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:15,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 16:04:15,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711639444] [2024-06-20 16:04:15,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:15,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 16:04:15,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:15,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 16:04:15,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-20 16:04:15,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:04:15,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 25 transitions, 120 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:15,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:15,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:04:15,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:16,106 INFO L124 PetriNetUnfolderBase]: 55/126 cut-off events. [2024-06-20 16:04:16,106 INFO L125 PetriNetUnfolderBase]: For 1176/1176 co-relation queries the response was YES. [2024-06-20 16:04:16,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 411 conditions, 126 events. 55/126 cut-off events. For 1176/1176 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 318 event pairs, 17 based on Foata normal form. 6/132 useless extension candidates. Maximal degree in co-relation 384. Up to 60 conditions per place. [2024-06-20 16:04:16,107 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 17 selfloop transitions, 6 changer transitions 14/39 dead transitions. [2024-06-20 16:04:16,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 39 transitions, 224 flow [2024-06-20 16:04:16,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:04:16,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:04:16,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 104 transitions. [2024-06-20 16:04:16,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3151515151515151 [2024-06-20 16:04:16,107 INFO L175 Difference]: Start difference. First operand has 59 places, 25 transitions, 120 flow. Second operand 11 states and 104 transitions. [2024-06-20 16:04:16,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 39 transitions, 224 flow [2024-06-20 16:04:16,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 39 transitions, 206 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-20 16:04:16,109 INFO L231 Difference]: Finished difference. Result has 52 places, 21 transitions, 98 flow [2024-06-20 16:04:16,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=98, PETRI_PLACES=52, PETRI_TRANSITIONS=21} [2024-06-20 16:04:16,109 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 23 predicate places. [2024-06-20 16:04:16,109 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 21 transitions, 98 flow [2024-06-20 16:04:16,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:16,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:16,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:16,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 16:04:16,110 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 16:04:16,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:16,110 INFO L85 PathProgramCache]: Analyzing trace with hash 2146352573, now seen corresponding path program 4 times [2024-06-20 16:04:16,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:16,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331534738] [2024-06-20 16:04:16,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:16,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:16,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:16,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:16,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:16,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331534738] [2024-06-20 16:04:16,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331534738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:16,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:16,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 16:04:16,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445254957] [2024-06-20 16:04:16,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:16,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 16:04:16,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:16,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 16:04:16,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-20 16:04:17,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 16:04:17,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 21 transitions, 98 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:17,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:17,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 16:04:17,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:17,263 INFO L124 PetriNetUnfolderBase]: 26/67 cut-off events. [2024-06-20 16:04:17,263 INFO L125 PetriNetUnfolderBase]: For 372/372 co-relation queries the response was YES. [2024-06-20 16:04:17,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 67 events. 26/67 cut-off events. For 372/372 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 100 event pairs, 0 based on Foata normal form. 6/73 useless extension candidates. Maximal degree in co-relation 172. Up to 24 conditions per place. [2024-06-20 16:04:17,264 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 0 selfloop transitions, 0 changer transitions 30/30 dead transitions. [2024-06-20 16:04:17,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 30 transitions, 150 flow [2024-06-20 16:04:17,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:04:17,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:04:17,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 95 transitions. [2024-06-20 16:04:17,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2878787878787879 [2024-06-20 16:04:17,265 INFO L175 Difference]: Start difference. First operand has 52 places, 21 transitions, 98 flow. Second operand 11 states and 95 transitions. [2024-06-20 16:04:17,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 30 transitions, 150 flow [2024-06-20 16:04:17,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 30 transitions, 122 flow, removed 1 selfloop flow, removed 14 redundant places. [2024-06-20 16:04:17,265 INFO L231 Difference]: Finished difference. Result has 40 places, 0 transitions, 0 flow [2024-06-20 16:04:17,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=0, PETRI_PLACES=40, PETRI_TRANSITIONS=0} [2024-06-20 16:04:17,266 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 11 predicate places. [2024-06-20 16:04:17,266 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 0 transitions, 0 flow [2024-06-20 16:04:17,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:17,268 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-20 16:04:17,269 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-20 16:04:17,269 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-20 16:04:17,269 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-20 16:04:17,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 16:04:17,269 INFO L445 BasicCegarLoop]: Path program histogram: [24, 9, 8, 8, 6, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:17,272 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-20 16:04:17,272 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-20 16:04:17,274 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-20 16:04:17,274 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-20 16:04:17,275 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.06 04:04:17 BasicIcfg [2024-06-20 16:04:17,275 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-20 16:04:17,276 INFO L158 Benchmark]: Toolchain (without parser) took 95999.46ms. Allocated memory was 161.5MB in the beginning and 775.9MB in the end (delta: 614.5MB). Free memory was 130.6MB in the beginning and 605.5MB in the end (delta: -474.9MB). Peak memory consumption was 140.7MB. Max. memory is 16.1GB. [2024-06-20 16:04:17,276 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 100.7MB. Free memory is still 44.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-20 16:04:17,276 INFO L158 Benchmark]: Witness Parser took 4.31ms. Allocated memory is still 161.5MB. Free memory is still 93.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-20 16:04:17,276 INFO L158 Benchmark]: CACSL2BoogieTranslator took 511.34ms. Allocated memory is still 161.5MB. Free memory was 129.8MB in the beginning and 97.5MB in the end (delta: 32.3MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. [2024-06-20 16:04:17,276 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.98ms. Allocated memory is still 161.5MB. Free memory was 97.5MB in the beginning and 95.0MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-20 16:04:17,277 INFO L158 Benchmark]: Boogie Preprocessor took 43.49ms. Allocated memory is still 161.5MB. Free memory was 95.0MB in the beginning and 91.3MB in the end (delta: 3.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-20 16:04:17,277 INFO L158 Benchmark]: RCFGBuilder took 690.65ms. Allocated memory is still 161.5MB. Free memory was 91.3MB in the beginning and 116.3MB in the end (delta: -25.0MB). Peak memory consumption was 46.9MB. Max. memory is 16.1GB. [2024-06-20 16:04:17,277 INFO L158 Benchmark]: TraceAbstraction took 94693.20ms. Allocated memory was 161.5MB in the beginning and 775.9MB in the end (delta: 614.5MB). Free memory was 115.3MB in the beginning and 605.5MB in the end (delta: -490.2MB). Peak memory consumption was 125.2MB. Max. memory is 16.1GB. [2024-06-20 16:04:17,278 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 100.7MB. Free memory is still 44.6MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 4.31ms. Allocated memory is still 161.5MB. Free memory is still 93.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 511.34ms. Allocated memory is still 161.5MB. Free memory was 129.8MB in the beginning and 97.5MB in the end (delta: 32.3MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 55.98ms. Allocated memory is still 161.5MB. Free memory was 97.5MB in the beginning and 95.0MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 43.49ms. Allocated memory is still 161.5MB. Free memory was 95.0MB in the beginning and 91.3MB in the end (delta: 3.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 690.65ms. Allocated memory is still 161.5MB. Free memory was 91.3MB in the beginning and 116.3MB in the end (delta: -25.0MB). Peak memory consumption was 46.9MB. Max. memory is 16.1GB. * TraceAbstraction took 94693.20ms. Allocated memory was 161.5MB in the beginning and 775.9MB in the end (delta: 614.5MB). Free memory was 115.3MB in the beginning and 605.5MB in the end (delta: -490.2MB). Peak memory consumption was 125.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 813]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 814]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 48 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: 94.6s, OverallIterations: 86, TraceHistogramMax: 1, PathProgramHistogramMax: 24, EmptinessCheckTime: 0.0s, AutomataDifference: 30.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5316 SdHoareTripleChecker+Valid, 18.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4526 mSDsluCounter, 3621 SdHoareTripleChecker+Invalid, 15.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3246 mSDsCounter, 1262 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 30080 IncrementalHoareTripleChecker+Invalid, 31342 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1262 mSolverCounterUnsat, 375 mSDtfsCounter, 30080 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 925 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 924 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1814 ImplicationChecksByTransitivity, 22.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1091occurred in iteration=35, InterpolantAutomatonStates: 794, 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, 0.5s SatisfiabilityAnalysisTime, 62.5s InterpolantComputationTime, 1323 NumberOfCodeBlocks, 1323 NumberOfCodeBlocksAsserted, 86 NumberOfCheckSat, 1237 ConstructedInterpolants, 0 QuantifiedInterpolants, 51598 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 86 InterpolantComputations, 86 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! [2024-06-20 16:04:17,308 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