./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix009.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix009.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix009.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix009.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 20:36:52,768 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 20:36:52,846 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 20:36:52,851 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 20:36:52,852 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 20:36:52,880 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 20:36:52,881 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 20:36:52,881 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 20:36:52,882 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 20:36:52,886 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 20:36:52,886 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 20:36:52,886 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 20:36:52,887 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 20:36:52,888 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 20:36:52,889 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 20:36:52,889 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 20:36:52,889 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 20:36:52,890 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 20:36:52,890 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 20:36:52,890 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 20:36:52,890 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 20:36:52,891 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 20:36:52,891 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 20:36:52,891 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 20:36:52,892 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 20:36:52,892 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 20:36:52,892 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 20:36:52,892 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 20:36:52,893 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 20:36:52,893 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 20:36:52,894 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 20:36:52,894 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 20:36:52,895 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:36:52,895 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 20:36:52,895 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 20:36:52,895 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 20:36:52,895 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 20:36:52,896 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 20:36:52,896 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 20:36:52,896 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 20:36:52,896 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 20:36:52,897 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 20:36:52,897 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 20:36:52,897 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 20:36:53,097 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 20:36:53,114 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 20:36:53,117 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 20:36:53,118 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 20:36:53,119 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 20:36:53,120 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix009.oepc.yml/witness.yml [2024-06-21 20:36:53,281 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 20:36:53,281 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 20:36:53,282 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix009.oepc.i [2024-06-21 20:36:54,378 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 20:36:54,604 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 20:36:54,605 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix009.oepc.i [2024-06-21 20:36:54,618 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9382fcd12/473371d396574663a0f77a666b59f39c/FLAG17533612c [2024-06-21 20:36:54,630 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9382fcd12/473371d396574663a0f77a666b59f39c [2024-06-21 20:36:54,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 20:36:54,631 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 20:36:54,632 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 20:36:54,633 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 20:36:54,637 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 20:36:54,638 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:36:53" (1/2) ... [2024-06-21 20:36:54,639 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bd467dc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:36:54, skipping insertion in model container [2024-06-21 20:36:54,639 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:36:53" (1/2) ... [2024-06-21 20:36:54,640 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@692934fa and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:36:54, skipping insertion in model container [2024-06-21 20:36:54,641 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:36:54" (2/2) ... [2024-06-21 20:36:54,641 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bd467dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:36:54, skipping insertion in model container [2024-06-21 20:36:54,641 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:36:54" (2/2) ... [2024-06-21 20:36:54,642 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 20:36:54,711 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 20:36:54,712 INFO L97 edCorrectnessWitness]: Location invariant before [L826-L826] (((((((((((((((((! multithreaded || z$r_buff0_thd2 == (_Bool)0) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt) [2024-06-21 20:36:54,712 INFO L97 edCorrectnessWitness]: Location invariant before [L825-L825] (((((((((((((((((! multithreaded || z$r_buff0_thd2 == (_Bool)0) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt) [2024-06-21 20:36:54,712 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 20:36:54,712 INFO L106 edCorrectnessWitness]: ghost_update [L823-L823] multithreaded = 1; [2024-06-21 20:36:54,758 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 20:36:55,151 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:36:55,161 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 20:36:55,281 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:36:55,319 INFO L206 MainTranslator]: Completed translation [2024-06-21 20:36:55,321 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:36:55 WrapperNode [2024-06-21 20:36:55,321 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 20:36:55,322 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 20:36:55,322 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 20:36:55,322 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 20:36:55,329 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:36:55" (1/1) ... [2024-06-21 20:36:55,343 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:36:55" (1/1) ... [2024-06-21 20:36:55,375 INFO L138 Inliner]: procedures = 174, calls = 40, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 122 [2024-06-21 20:36:55,375 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 20:36:55,376 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 20:36:55,376 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 20:36:55,376 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 20:36:55,387 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:36:55" (1/1) ... [2024-06-21 20:36:55,396 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:36:55" (1/1) ... [2024-06-21 20:36:55,399 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:36:55" (1/1) ... [2024-06-21 20:36:55,421 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 20:36:55,421 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:36:55" (1/1) ... [2024-06-21 20:36:55,422 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:36:55" (1/1) ... [2024-06-21 20:36:55,436 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:36:55" (1/1) ... [2024-06-21 20:36:55,438 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:36:55" (1/1) ... [2024-06-21 20:36:55,439 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:36:55" (1/1) ... [2024-06-21 20:36:55,441 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:36:55" (1/1) ... [2024-06-21 20:36:55,444 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 20:36:55,445 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 20:36:55,445 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 20:36:55,445 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 20:36:55,447 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:36:55" (1/1) ... [2024-06-21 20:36:55,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:36:55,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 20:36:55,484 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 20:36:55,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 20:36:55,532 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 20:36:55,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 20:36:55,532 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 20:36:55,532 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 20:36:55,532 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 20:36:55,533 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 20:36:55,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 20:36:55,533 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 20:36:55,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 20:36:55,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 20:36:55,534 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 20:36:55,639 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 20:36:55,640 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 20:36:55,918 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 20:36:55,918 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 20:36:56,157 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 20:36:56,157 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 20:36:56,158 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:36:56 BoogieIcfgContainer [2024-06-21 20:36:56,158 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 20:36:56,160 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 20:36:56,160 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 20:36:56,163 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 20:36:56,163 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:36:53" (1/4) ... [2024-06-21 20:36:56,164 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62e83e34 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:36:56, skipping insertion in model container [2024-06-21 20:36:56,164 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 08:36:54" (2/4) ... [2024-06-21 20:36:56,164 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62e83e34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:36:56, skipping insertion in model container [2024-06-21 20:36:56,164 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:36:55" (3/4) ... [2024-06-21 20:36:56,165 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62e83e34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:36:56, skipping insertion in model container [2024-06-21 20:36:56,165 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:36:56" (4/4) ... [2024-06-21 20:36:56,166 INFO L112 eAbstractionObserver]: Analyzing ICFG mix009.oepc.i [2024-06-21 20:36:56,182 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 20:36:56,182 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-21 20:36:56,182 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 20:36:56,216 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 20:36:56,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 32 transitions, 72 flow [2024-06-21 20:36:56,292 INFO L124 PetriNetUnfolderBase]: 0/30 cut-off events. [2024-06-21 20:36:56,293 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:36:56,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 30 events. 0/30 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 47 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 20:36:56,294 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 32 transitions, 72 flow [2024-06-21 20:36:56,298 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 24 transitions, 54 flow [2024-06-21 20:36:56,309 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 20:36:56,316 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;@68663f54, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 20:36:56,317 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-21 20:36:56,320 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 20:36:56,320 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 20:36:56,320 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:36:56,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:36:56,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 20:36:56,322 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:36:56,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:36:56,328 INFO L85 PathProgramCache]: Analyzing trace with hash 337095837, now seen corresponding path program 1 times [2024-06-21 20:36:56,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:36:56,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601268283] [2024-06-21 20:36:56,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:36:56,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:36:56,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:36:57,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:36:57,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:36:57,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601268283] [2024-06-21 20:36:57,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601268283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:36:57,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:36:57,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 20:36:57,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757965696] [2024-06-21 20:36:57,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:36:57,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 20:36:57,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:36:57,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 20:36:57,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 20:36:57,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 32 [2024-06-21 20:36:57,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 24 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:57,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:36:57,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 32 [2024-06-21 20:36:57,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:36:57,437 INFO L124 PetriNetUnfolderBase]: 162/314 cut-off events. [2024-06-21 20:36:57,442 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-06-21 20:36:57,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 625 conditions, 314 events. 162/314 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1238 event pairs, 97 based on Foata normal form. 1/305 useless extension candidates. Maximal degree in co-relation 614. Up to 288 conditions per place. [2024-06-21 20:36:57,449 INFO L140 encePairwiseOnDemand]: 27/32 looper letters, 21 selfloop transitions, 3 changer transitions 0/30 dead transitions. [2024-06-21 20:36:57,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 30 transitions, 117 flow [2024-06-21 20:36:57,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 20:36:57,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 20:36:57,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 59 transitions. [2024-06-21 20:36:57,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6145833333333334 [2024-06-21 20:36:57,464 INFO L175 Difference]: Start difference. First operand has 31 places, 24 transitions, 54 flow. Second operand 3 states and 59 transitions. [2024-06-21 20:36:57,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 30 transitions, 117 flow [2024-06-21 20:36:57,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 30 transitions, 114 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-21 20:36:57,469 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 73 flow [2024-06-21 20:36:57,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2024-06-21 20:36:57,475 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 1 predicate places. [2024-06-21 20:36:57,476 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 73 flow [2024-06-21 20:36:57,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:57,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:36:57,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:36:57,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 20:36:57,477 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:36:57,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:36:57,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1826570300, now seen corresponding path program 1 times [2024-06-21 20:36:57,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:36:57,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768591867] [2024-06-21 20:36:57,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:36:57,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:36:57,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:36:58,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:36:58,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:36:58,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768591867] [2024-06-21 20:36:58,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768591867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:36:58,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:36:58,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:36:58,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429402774] [2024-06-21 20:36:58,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:36:58,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:36:58,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:36:58,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:36:58,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:36:58,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 32 [2024-06-21 20:36:58,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 73 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:58,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:36:58,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 32 [2024-06-21 20:36:58,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:36:58,312 INFO L124 PetriNetUnfolderBase]: 159/309 cut-off events. [2024-06-21 20:36:58,312 INFO L125 PetriNetUnfolderBase]: For 62/62 co-relation queries the response was YES. [2024-06-21 20:36:58,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 697 conditions, 309 events. 159/309 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1225 event pairs, 79 based on Foata normal form. 2/306 useless extension candidates. Maximal degree in co-relation 685. Up to 274 conditions per place. [2024-06-21 20:36:58,318 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 25 selfloop transitions, 5 changer transitions 0/36 dead transitions. [2024-06-21 20:36:58,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 36 transitions, 159 flow [2024-06-21 20:36:58,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:36:58,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:36:58,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 76 transitions. [2024-06-21 20:36:58,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-21 20:36:58,322 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 73 flow. Second operand 4 states and 76 transitions. [2024-06-21 20:36:58,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 36 transitions, 159 flow [2024-06-21 20:36:58,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 36 transitions, 156 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 20:36:58,327 INFO L231 Difference]: Finished difference. Result has 35 places, 28 transitions, 97 flow [2024-06-21 20:36:58,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=97, PETRI_PLACES=35, PETRI_TRANSITIONS=28} [2024-06-21 20:36:58,328 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 4 predicate places. [2024-06-21 20:36:58,328 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 28 transitions, 97 flow [2024-06-21 20:36:58,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:58,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:36:58,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:36:58,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 20:36:58,329 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:36:58,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:36:58,331 INFO L85 PathProgramCache]: Analyzing trace with hash 789105080, now seen corresponding path program 1 times [2024-06-21 20:36:58,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:36:58,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561722568] [2024-06-21 20:36:58,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:36:58,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:36:58,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:36:58,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:36:58,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:36:58,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561722568] [2024-06-21 20:36:58,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561722568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:36:58,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:36:58,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:36:58,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432462658] [2024-06-21 20:36:58,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:36:59,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:36:59,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:36:59,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:36:59,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:36:59,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 32 [2024-06-21 20:36:59,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 28 transitions, 97 flow. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:59,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:36:59,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 32 [2024-06-21 20:36:59,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:36:59,175 INFO L124 PetriNetUnfolderBase]: 187/359 cut-off events. [2024-06-21 20:36:59,176 INFO L125 PetriNetUnfolderBase]: For 204/204 co-relation queries the response was YES. [2024-06-21 20:36:59,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 892 conditions, 359 events. 187/359 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1389 event pairs, 83 based on Foata normal form. 2/360 useless extension candidates. Maximal degree in co-relation 878. Up to 313 conditions per place. [2024-06-21 20:36:59,178 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 30 selfloop transitions, 7 changer transitions 0/42 dead transitions. [2024-06-21 20:36:59,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 42 transitions, 209 flow [2024-06-21 20:36:59,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:36:59,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:36:59,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-21 20:36:59,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55625 [2024-06-21 20:36:59,180 INFO L175 Difference]: Start difference. First operand has 35 places, 28 transitions, 97 flow. Second operand 5 states and 89 transitions. [2024-06-21 20:36:59,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 42 transitions, 209 flow [2024-06-21 20:36:59,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 42 transitions, 200 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-21 20:36:59,182 INFO L231 Difference]: Finished difference. Result has 38 places, 30 transitions, 121 flow [2024-06-21 20:36:59,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=121, PETRI_PLACES=38, PETRI_TRANSITIONS=30} [2024-06-21 20:36:59,183 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 7 predicate places. [2024-06-21 20:36:59,184 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 30 transitions, 121 flow [2024-06-21 20:36:59,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:59,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:36:59,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:36:59,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 20:36:59,185 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:36:59,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:36:59,185 INFO L85 PathProgramCache]: Analyzing trace with hash -670316147, now seen corresponding path program 1 times [2024-06-21 20:36:59,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:36:59,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225305476] [2024-06-21 20:36:59,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:36:59,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:36:59,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:36:59,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:36:59,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:36:59,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225305476] [2024-06-21 20:36:59,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225305476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:36:59,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:36:59,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:36:59,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083527479] [2024-06-21 20:36:59,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:36:59,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:36:59,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:36:59,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:36:59,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:36:59,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 32 [2024-06-21 20:36:59,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 30 transitions, 121 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:59,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:36:59,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 32 [2024-06-21 20:36:59,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:00,055 INFO L124 PetriNetUnfolderBase]: 184/356 cut-off events. [2024-06-21 20:37:00,057 INFO L125 PetriNetUnfolderBase]: For 341/341 co-relation queries the response was YES. [2024-06-21 20:37:00,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 963 conditions, 356 events. 184/356 cut-off events. For 341/341 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1370 event pairs, 65 based on Foata normal form. 2/357 useless extension candidates. Maximal degree in co-relation 948. Up to 299 conditions per place. [2024-06-21 20:37:00,060 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 34 selfloop transitions, 9 changer transitions 0/48 dead transitions. [2024-06-21 20:37:00,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 48 transitions, 257 flow [2024-06-21 20:37:00,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:37:00,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:37:00,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-21 20:37:00,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546875 [2024-06-21 20:37:00,065 INFO L175 Difference]: Start difference. First operand has 38 places, 30 transitions, 121 flow. Second operand 6 states and 105 transitions. [2024-06-21 20:37:00,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 48 transitions, 257 flow [2024-06-21 20:37:00,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 48 transitions, 242 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 20:37:00,068 INFO L231 Difference]: Finished difference. Result has 41 places, 32 transitions, 145 flow [2024-06-21 20:37:00,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=145, PETRI_PLACES=41, PETRI_TRANSITIONS=32} [2024-06-21 20:37:00,070 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 10 predicate places. [2024-06-21 20:37:00,070 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 32 transitions, 145 flow [2024-06-21 20:37:00,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:00,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:00,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:00,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 20:37:00,071 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:00,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:00,072 INFO L85 PathProgramCache]: Analyzing trace with hash -2063748116, now seen corresponding path program 1 times [2024-06-21 20:37:00,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:00,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473541470] [2024-06-21 20:37:00,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:00,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:00,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:00,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:00,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:00,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473541470] [2024-06-21 20:37:00,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473541470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:00,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:00,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:37:00,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406543621] [2024-06-21 20:37:00,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:00,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:37:00,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:00,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:37:00,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:37:00,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-21 20:37:00,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 32 transitions, 145 flow. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:00,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:00,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-21 20:37:00,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:01,008 INFO L124 PetriNetUnfolderBase]: 230/423 cut-off events. [2024-06-21 20:37:01,008 INFO L125 PetriNetUnfolderBase]: For 639/639 co-relation queries the response was YES. [2024-06-21 20:37:01,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1247 conditions, 423 events. 230/423 cut-off events. For 639/639 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1590 event pairs, 100 based on Foata normal form. 1/423 useless extension candidates. Maximal degree in co-relation 1230. Up to 402 conditions per place. [2024-06-21 20:37:01,011 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 29 selfloop transitions, 6 changer transitions 0/39 dead transitions. [2024-06-21 20:37:01,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 39 transitions, 233 flow [2024-06-21 20:37:01,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:37:01,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:37:01,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2024-06-21 20:37:01,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-21 20:37:01,014 INFO L175 Difference]: Start difference. First operand has 41 places, 32 transitions, 145 flow. Second operand 5 states and 66 transitions. [2024-06-21 20:37:01,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 39 transitions, 233 flow [2024-06-21 20:37:01,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 39 transitions, 212 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 20:37:01,019 INFO L231 Difference]: Finished difference. Result has 42 places, 34 transitions, 151 flow [2024-06-21 20:37:01,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=151, PETRI_PLACES=42, PETRI_TRANSITIONS=34} [2024-06-21 20:37:01,023 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 11 predicate places. [2024-06-21 20:37:01,025 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 34 transitions, 151 flow [2024-06-21 20:37:01,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:01,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:01,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:01,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 20:37:01,031 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:01,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:01,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1874082682, now seen corresponding path program 1 times [2024-06-21 20:37:01,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:01,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132600681] [2024-06-21 20:37:01,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:01,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:01,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:02,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:02,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:02,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132600681] [2024-06-21 20:37:02,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132600681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:02,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:02,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:37:02,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909688137] [2024-06-21 20:37:02,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:02,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:37:02,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:02,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:37:02,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:37:02,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-21 20:37:02,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 34 transitions, 151 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:02,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:02,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-21 20:37:02,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:02,338 INFO L124 PetriNetUnfolderBase]: 223/414 cut-off events. [2024-06-21 20:37:02,339 INFO L125 PetriNetUnfolderBase]: For 887/887 co-relation queries the response was YES. [2024-06-21 20:37:02,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1277 conditions, 414 events. 223/414 cut-off events. For 887/887 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1557 event pairs, 58 based on Foata normal form. 2/415 useless extension candidates. Maximal degree in co-relation 1259. Up to 338 conditions per place. [2024-06-21 20:37:02,342 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 44 selfloop transitions, 13 changer transitions 0/62 dead transitions. [2024-06-21 20:37:02,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 62 transitions, 343 flow [2024-06-21 20:37:02,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:37:02,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:37:02,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 20:37:02,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5078125 [2024-06-21 20:37:02,344 INFO L175 Difference]: Start difference. First operand has 42 places, 34 transitions, 151 flow. Second operand 8 states and 130 transitions. [2024-06-21 20:37:02,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 62 transitions, 343 flow [2024-06-21 20:37:02,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 62 transitions, 332 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-21 20:37:02,346 INFO L231 Difference]: Finished difference. Result has 48 places, 38 transitions, 200 flow [2024-06-21 20:37:02,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=200, PETRI_PLACES=48, PETRI_TRANSITIONS=38} [2024-06-21 20:37:02,347 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 17 predicate places. [2024-06-21 20:37:02,347 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 38 transitions, 200 flow [2024-06-21 20:37:02,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:02,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:02,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:02,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 20:37:02,348 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:02,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:02,349 INFO L85 PathProgramCache]: Analyzing trace with hash 448318990, now seen corresponding path program 1 times [2024-06-21 20:37:02,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:02,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682777256] [2024-06-21 20:37:02,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:02,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:02,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:02,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:02,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:02,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682777256] [2024-06-21 20:37:02,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682777256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:02,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:02,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:37:02,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853433340] [2024-06-21 20:37:02,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:02,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:37:02,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:02,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:37:02,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:37:03,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-21 20:37:03,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 38 transitions, 200 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:03,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:03,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-21 20:37:03,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:03,362 INFO L124 PetriNetUnfolderBase]: 220/408 cut-off events. [2024-06-21 20:37:03,363 INFO L125 PetriNetUnfolderBase]: For 1121/1121 co-relation queries the response was YES. [2024-06-21 20:37:03,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1385 conditions, 408 events. 220/408 cut-off events. For 1121/1121 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1488 event pairs, 58 based on Foata normal form. 3/410 useless extension candidates. Maximal degree in co-relation 1365. Up to 379 conditions per place. [2024-06-21 20:37:03,366 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 36 selfloop transitions, 8 changer transitions 0/48 dead transitions. [2024-06-21 20:37:03,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 48 transitions, 314 flow [2024-06-21 20:37:03,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:37:03,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:37:03,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 78 transitions. [2024-06-21 20:37:03,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-21 20:37:03,368 INFO L175 Difference]: Start difference. First operand has 48 places, 38 transitions, 200 flow. Second operand 6 states and 78 transitions. [2024-06-21 20:37:03,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 48 transitions, 314 flow [2024-06-21 20:37:03,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 48 transitions, 285 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 20:37:03,371 INFO L231 Difference]: Finished difference. Result has 49 places, 40 transitions, 204 flow [2024-06-21 20:37:03,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=204, PETRI_PLACES=49, PETRI_TRANSITIONS=40} [2024-06-21 20:37:03,371 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 18 predicate places. [2024-06-21 20:37:03,371 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 40 transitions, 204 flow [2024-06-21 20:37:03,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:03,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:03,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:03,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 20:37:03,372 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:03,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:03,373 INFO L85 PathProgramCache]: Analyzing trace with hash 451246899, now seen corresponding path program 1 times [2024-06-21 20:37:03,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:03,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461114731] [2024-06-21 20:37:03,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:03,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:03,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:04,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:04,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:04,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461114731] [2024-06-21 20:37:04,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461114731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:04,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:04,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:37:04,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808602391] [2024-06-21 20:37:04,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:04,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:37:04,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:04,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:37:04,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:37:04,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-21 20:37:04,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 40 transitions, 204 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:04,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:04,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-21 20:37:04,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:04,223 INFO L124 PetriNetUnfolderBase]: 234/431 cut-off events. [2024-06-21 20:37:04,224 INFO L125 PetriNetUnfolderBase]: For 1381/1381 co-relation queries the response was YES. [2024-06-21 20:37:04,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1519 conditions, 431 events. 234/431 cut-off events. For 1381/1381 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1607 event pairs, 59 based on Foata normal form. 1/431 useless extension candidates. Maximal degree in co-relation 1497. Up to 396 conditions per place. [2024-06-21 20:37:04,227 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 38 selfloop transitions, 13 changer transitions 0/55 dead transitions. [2024-06-21 20:37:04,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 55 transitions, 374 flow [2024-06-21 20:37:04,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:37:04,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:37:04,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 88 transitions. [2024-06-21 20:37:04,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 20:37:04,229 INFO L175 Difference]: Start difference. First operand has 49 places, 40 transitions, 204 flow. Second operand 7 states and 88 transitions. [2024-06-21 20:37:04,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 55 transitions, 374 flow [2024-06-21 20:37:04,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 55 transitions, 355 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 20:37:04,232 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 271 flow [2024-06-21 20:37:04,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=271, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2024-06-21 20:37:04,232 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 23 predicate places. [2024-06-21 20:37:04,233 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 271 flow [2024-06-21 20:37:04,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:04,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:04,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:04,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 20:37:04,233 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:04,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:04,234 INFO L85 PathProgramCache]: Analyzing trace with hash -131968361, now seen corresponding path program 2 times [2024-06-21 20:37:04,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:04,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193124863] [2024-06-21 20:37:04,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:04,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:04,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:04,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:04,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:04,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193124863] [2024-06-21 20:37:04,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193124863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:04,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:04,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:37:04,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467168696] [2024-06-21 20:37:04,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:04,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:37:04,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:04,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:37:04,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:37:04,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-21 20:37:04,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 271 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:04,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:04,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-21 20:37:04,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:05,138 INFO L124 PetriNetUnfolderBase]: 232/428 cut-off events. [2024-06-21 20:37:05,139 INFO L125 PetriNetUnfolderBase]: For 1747/1747 co-relation queries the response was YES. [2024-06-21 20:37:05,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1615 conditions, 428 events. 232/428 cut-off events. For 1747/1747 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1585 event pairs, 58 based on Foata normal form. 1/428 useless extension candidates. Maximal degree in co-relation 1590. Up to 402 conditions per place. [2024-06-21 20:37:05,142 INFO L140 encePairwiseOnDemand]: 25/32 looper letters, 40 selfloop transitions, 9 changer transitions 0/53 dead transitions. [2024-06-21 20:37:05,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 53 transitions, 381 flow [2024-06-21 20:37:05,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:37:05,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:37:05,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 76 transitions. [2024-06-21 20:37:05,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-21 20:37:05,144 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 271 flow. Second operand 6 states and 76 transitions. [2024-06-21 20:37:05,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 53 transitions, 381 flow [2024-06-21 20:37:05,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 53 transitions, 373 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-21 20:37:05,149 INFO L231 Difference]: Finished difference. Result has 59 places, 48 transitions, 286 flow [2024-06-21 20:37:05,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=286, PETRI_PLACES=59, PETRI_TRANSITIONS=48} [2024-06-21 20:37:05,151 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 28 predicate places. [2024-06-21 20:37:05,151 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 48 transitions, 286 flow [2024-06-21 20:37:05,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:05,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:05,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:05,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 20:37:05,152 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:05,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:05,152 INFO L85 PathProgramCache]: Analyzing trace with hash -2032978250, now seen corresponding path program 1 times [2024-06-21 20:37:05,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:05,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532650343] [2024-06-21 20:37:05,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:05,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:05,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:06,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:06,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:06,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532650343] [2024-06-21 20:37:06,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532650343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:06,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:06,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:37:06,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550494363] [2024-06-21 20:37:06,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:06,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:37:06,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:06,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:37:06,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:37:06,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-21 20:37:06,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 48 transitions, 286 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:06,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:06,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-21 20:37:06,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:06,515 INFO L124 PetriNetUnfolderBase]: 226/418 cut-off events. [2024-06-21 20:37:06,516 INFO L125 PetriNetUnfolderBase]: For 2211/2211 co-relation queries the response was YES. [2024-06-21 20:37:06,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1609 conditions, 418 events. 226/418 cut-off events. For 2211/2211 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1518 event pairs, 35 based on Foata normal form. 4/421 useless extension candidates. Maximal degree in co-relation 1582. Up to 314 conditions per place. [2024-06-21 20:37:06,519 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 48 selfloop transitions, 17 changer transitions 0/72 dead transitions. [2024-06-21 20:37:06,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 72 transitions, 476 flow [2024-06-21 20:37:06,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:37:06,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:37:06,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-21 20:37:06,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4861111111111111 [2024-06-21 20:37:06,521 INFO L175 Difference]: Start difference. First operand has 59 places, 48 transitions, 286 flow. Second operand 9 states and 140 transitions. [2024-06-21 20:37:06,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 72 transitions, 476 flow [2024-06-21 20:37:06,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 72 transitions, 459 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-21 20:37:06,529 INFO L231 Difference]: Finished difference. Result has 63 places, 47 transitions, 295 flow [2024-06-21 20:37:06,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=295, PETRI_PLACES=63, PETRI_TRANSITIONS=47} [2024-06-21 20:37:06,530 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 32 predicate places. [2024-06-21 20:37:06,531 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 47 transitions, 295 flow [2024-06-21 20:37:06,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:06,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:06,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:06,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 20:37:06,532 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:06,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:06,532 INFO L85 PathProgramCache]: Analyzing trace with hash 2018282413, now seen corresponding path program 3 times [2024-06-21 20:37:06,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:06,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674693959] [2024-06-21 20:37:06,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:06,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:06,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:07,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:07,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:07,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674693959] [2024-06-21 20:37:07,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674693959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:07,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:07,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:37:07,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628543552] [2024-06-21 20:37:07,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:07,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:37:07,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:07,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:37:07,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:37:07,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-21 20:37:07,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 47 transitions, 295 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:07,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:07,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-21 20:37:07,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:07,482 INFO L124 PetriNetUnfolderBase]: 226/417 cut-off events. [2024-06-21 20:37:07,483 INFO L125 PetriNetUnfolderBase]: For 2470/2470 co-relation queries the response was YES. [2024-06-21 20:37:07,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1687 conditions, 417 events. 226/417 cut-off events. For 2470/2470 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1512 event pairs, 54 based on Foata normal form. 1/417 useless extension candidates. Maximal degree in co-relation 1659. Up to 374 conditions per place. [2024-06-21 20:37:07,486 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 39 selfloop transitions, 17 changer transitions 0/60 dead transitions. [2024-06-21 20:37:07,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 60 transitions, 457 flow [2024-06-21 20:37:07,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:37:07,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:37:07,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 91 transitions. [2024-06-21 20:37:07,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-21 20:37:07,487 INFO L175 Difference]: Start difference. First operand has 63 places, 47 transitions, 295 flow. Second operand 7 states and 91 transitions. [2024-06-21 20:37:07,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 60 transitions, 457 flow [2024-06-21 20:37:07,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 60 transitions, 413 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 20:37:07,493 INFO L231 Difference]: Finished difference. Result has 64 places, 51 transitions, 332 flow [2024-06-21 20:37:07,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=332, PETRI_PLACES=64, PETRI_TRANSITIONS=51} [2024-06-21 20:37:07,493 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 33 predicate places. [2024-06-21 20:37:07,494 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 51 transitions, 332 flow [2024-06-21 20:37:07,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:07,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:07,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:07,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 20:37:07,494 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:07,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:07,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1103573389, now seen corresponding path program 1 times [2024-06-21 20:37:07,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:07,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641889258] [2024-06-21 20:37:07,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:07,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:07,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:08,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:08,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:08,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641889258] [2024-06-21 20:37:08,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641889258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:08,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:08,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:37:08,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82924531] [2024-06-21 20:37:08,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:08,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:37:08,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:08,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:37:08,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:37:08,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:37:08,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 51 transitions, 332 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:08,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:08,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:37:08,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:08,471 INFO L124 PetriNetUnfolderBase]: 245/438 cut-off events. [2024-06-21 20:37:08,471 INFO L125 PetriNetUnfolderBase]: For 3036/3036 co-relation queries the response was YES. [2024-06-21 20:37:08,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1832 conditions, 438 events. 245/438 cut-off events. For 3036/3036 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1569 event pairs, 54 based on Foata normal form. 1/438 useless extension candidates. Maximal degree in co-relation 1801. Up to 383 conditions per place. [2024-06-21 20:37:08,474 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 44 selfloop transitions, 21 changer transitions 0/67 dead transitions. [2024-06-21 20:37:08,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 67 transitions, 542 flow [2024-06-21 20:37:08,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:37:08,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:37:08,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 89 transitions. [2024-06-21 20:37:08,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39732142857142855 [2024-06-21 20:37:08,476 INFO L175 Difference]: Start difference. First operand has 64 places, 51 transitions, 332 flow. Second operand 7 states and 89 transitions. [2024-06-21 20:37:08,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 67 transitions, 542 flow [2024-06-21 20:37:08,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 67 transitions, 510 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 20:37:08,481 INFO L231 Difference]: Finished difference. Result has 68 places, 55 transitions, 375 flow [2024-06-21 20:37:08,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=375, PETRI_PLACES=68, PETRI_TRANSITIONS=55} [2024-06-21 20:37:08,482 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 37 predicate places. [2024-06-21 20:37:08,482 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 55 transitions, 375 flow [2024-06-21 20:37:08,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:08,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:08,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:08,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 20:37:08,483 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:08,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:08,483 INFO L85 PathProgramCache]: Analyzing trace with hash -375418429, now seen corresponding path program 1 times [2024-06-21 20:37:08,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:08,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281837053] [2024-06-21 20:37:08,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:08,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:08,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:09,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:09,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:09,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281837053] [2024-06-21 20:37:09,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281837053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:09,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:09,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:37:09,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101056611] [2024-06-21 20:37:09,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:09,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:37:09,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:09,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:37:09,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:37:09,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-21 20:37:09,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 55 transitions, 375 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:09,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:09,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-21 20:37:09,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:09,493 INFO L124 PetriNetUnfolderBase]: 255/463 cut-off events. [2024-06-21 20:37:09,493 INFO L125 PetriNetUnfolderBase]: For 3977/3977 co-relation queries the response was YES. [2024-06-21 20:37:09,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2017 conditions, 463 events. 255/463 cut-off events. For 3977/3977 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1730 event pairs, 58 based on Foata normal form. 3/465 useless extension candidates. Maximal degree in co-relation 1985. Up to 397 conditions per place. [2024-06-21 20:37:09,497 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 50 selfloop transitions, 17 changer transitions 0/73 dead transitions. [2024-06-21 20:37:09,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 73 transitions, 591 flow [2024-06-21 20:37:09,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:37:09,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:37:09,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 103 transitions. [2024-06-21 20:37:09,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40234375 [2024-06-21 20:37:09,498 INFO L175 Difference]: Start difference. First operand has 68 places, 55 transitions, 375 flow. Second operand 8 states and 103 transitions. [2024-06-21 20:37:09,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 73 transitions, 591 flow [2024-06-21 20:37:09,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 73 transitions, 562 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 20:37:09,504 INFO L231 Difference]: Finished difference. Result has 74 places, 61 transitions, 428 flow [2024-06-21 20:37:09,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=428, PETRI_PLACES=74, PETRI_TRANSITIONS=61} [2024-06-21 20:37:09,505 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 43 predicate places. [2024-06-21 20:37:09,505 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 61 transitions, 428 flow [2024-06-21 20:37:09,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:09,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:09,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:09,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 20:37:09,509 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:09,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:09,510 INFO L85 PathProgramCache]: Analyzing trace with hash -375418677, now seen corresponding path program 2 times [2024-06-21 20:37:09,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:09,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650145694] [2024-06-21 20:37:09,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:09,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:09,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:10,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:10,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:10,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650145694] [2024-06-21 20:37:10,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650145694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:10,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:10,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:37:10,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305948672] [2024-06-21 20:37:10,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:10,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:37:10,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:10,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:37:10,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:37:10,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:37:10,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 61 transitions, 428 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:10,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:10,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:37:10,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:10,482 INFO L124 PetriNetUnfolderBase]: 272/482 cut-off events. [2024-06-21 20:37:10,483 INFO L125 PetriNetUnfolderBase]: For 4497/4497 co-relation queries the response was YES. [2024-06-21 20:37:10,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2261 conditions, 482 events. 272/482 cut-off events. For 4497/4497 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1729 event pairs, 55 based on Foata normal form. 1/482 useless extension candidates. Maximal degree in co-relation 2226. Up to 426 conditions per place. [2024-06-21 20:37:10,487 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 50 selfloop transitions, 21 changer transitions 0/73 dead transitions. [2024-06-21 20:37:10,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 73 transitions, 638 flow [2024-06-21 20:37:10,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:37:10,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:37:10,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 87 transitions. [2024-06-21 20:37:10,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38839285714285715 [2024-06-21 20:37:10,488 INFO L175 Difference]: Start difference. First operand has 74 places, 61 transitions, 428 flow. Second operand 7 states and 87 transitions. [2024-06-21 20:37:10,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 73 transitions, 638 flow [2024-06-21 20:37:10,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 73 transitions, 622 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 20:37:10,495 INFO L231 Difference]: Finished difference. Result has 78 places, 63 transitions, 474 flow [2024-06-21 20:37:10,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=474, PETRI_PLACES=78, PETRI_TRANSITIONS=63} [2024-06-21 20:37:10,496 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 47 predicate places. [2024-06-21 20:37:10,496 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 63 transitions, 474 flow [2024-06-21 20:37:10,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:10,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:10,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:10,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 20:37:10,497 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:10,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:10,498 INFO L85 PathProgramCache]: Analyzing trace with hash 203957621, now seen corresponding path program 2 times [2024-06-21 20:37:10,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:10,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257215156] [2024-06-21 20:37:10,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:10,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:10,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:11,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:11,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:11,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257215156] [2024-06-21 20:37:11,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257215156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:11,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:11,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:37:11,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939232203] [2024-06-21 20:37:11,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:11,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:37:11,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:11,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:37:11,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:37:11,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-21 20:37:11,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 63 transitions, 474 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:11,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:11,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-21 20:37:11,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:11,511 INFO L124 PetriNetUnfolderBase]: 267/483 cut-off events. [2024-06-21 20:37:11,511 INFO L125 PetriNetUnfolderBase]: For 5396/5396 co-relation queries the response was YES. [2024-06-21 20:37:11,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2326 conditions, 483 events. 267/483 cut-off events. For 5396/5396 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1784 event pairs, 56 based on Foata normal form. 3/485 useless extension candidates. Maximal degree in co-relation 2289. Up to 442 conditions per place. [2024-06-21 20:37:11,515 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 55 selfloop transitions, 11 changer transitions 0/73 dead transitions. [2024-06-21 20:37:11,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 73 transitions, 642 flow [2024-06-21 20:37:11,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:37:11,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:37:11,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 87 transitions. [2024-06-21 20:37:11,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38839285714285715 [2024-06-21 20:37:11,517 INFO L175 Difference]: Start difference. First operand has 78 places, 63 transitions, 474 flow. Second operand 7 states and 87 transitions. [2024-06-21 20:37:11,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 73 transitions, 642 flow [2024-06-21 20:37:11,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 73 transitions, 608 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 20:37:11,524 INFO L231 Difference]: Finished difference. Result has 81 places, 65 transitions, 487 flow [2024-06-21 20:37:11,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=487, PETRI_PLACES=81, PETRI_TRANSITIONS=65} [2024-06-21 20:37:11,525 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 50 predicate places. [2024-06-21 20:37:11,525 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 65 transitions, 487 flow [2024-06-21 20:37:11,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:11,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:11,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:11,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 20:37:11,526 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:11,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:11,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1337549903, now seen corresponding path program 3 times [2024-06-21 20:37:11,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:11,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346634696] [2024-06-21 20:37:11,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:11,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:11,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:12,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:12,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:12,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346634696] [2024-06-21 20:37:12,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346634696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:12,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:12,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:37:12,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922227143] [2024-06-21 20:37:12,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:12,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:37:12,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:12,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:37:12,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:37:12,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-21 20:37:12,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 65 transitions, 487 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:12,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:12,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-21 20:37:12,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:12,550 INFO L124 PetriNetUnfolderBase]: 261/474 cut-off events. [2024-06-21 20:37:12,551 INFO L125 PetriNetUnfolderBase]: For 5784/5784 co-relation queries the response was YES. [2024-06-21 20:37:12,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2295 conditions, 474 events. 261/474 cut-off events. For 5784/5784 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1751 event pairs, 54 based on Foata normal form. 3/476 useless extension candidates. Maximal degree in co-relation 2257. Up to 421 conditions per place. [2024-06-21 20:37:12,555 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 54 selfloop transitions, 14 changer transitions 0/75 dead transitions. [2024-06-21 20:37:12,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 75 transitions, 649 flow [2024-06-21 20:37:12,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:37:12,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:37:12,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 91 transitions. [2024-06-21 20:37:12,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-21 20:37:12,556 INFO L175 Difference]: Start difference. First operand has 81 places, 65 transitions, 487 flow. Second operand 7 states and 91 transitions. [2024-06-21 20:37:12,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 75 transitions, 649 flow [2024-06-21 20:37:12,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 75 transitions, 616 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 20:37:12,565 INFO L231 Difference]: Finished difference. Result has 83 places, 65 transitions, 487 flow [2024-06-21 20:37:12,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=487, PETRI_PLACES=83, PETRI_TRANSITIONS=65} [2024-06-21 20:37:12,566 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 52 predicate places. [2024-06-21 20:37:12,566 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 65 transitions, 487 flow [2024-06-21 20:37:12,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:12,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:12,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:12,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 20:37:12,567 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:12,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:12,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1110239629, now seen corresponding path program 3 times [2024-06-21 20:37:12,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:12,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573265206] [2024-06-21 20:37:12,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:12,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:12,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:13,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:13,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:13,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573265206] [2024-06-21 20:37:13,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573265206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:13,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:13,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:37:13,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987855997] [2024-06-21 20:37:13,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:13,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:37:13,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:13,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:37:13,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:37:13,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:37:13,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 65 transitions, 487 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:13,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:13,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:37:13,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:13,610 INFO L124 PetriNetUnfolderBase]: 273/485 cut-off events. [2024-06-21 20:37:13,611 INFO L125 PetriNetUnfolderBase]: For 6052/6052 co-relation queries the response was YES. [2024-06-21 20:37:13,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2374 conditions, 485 events. 273/485 cut-off events. For 6052/6052 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1756 event pairs, 54 based on Foata normal form. 1/485 useless extension candidates. Maximal degree in co-relation 2335. Up to 467 conditions per place. [2024-06-21 20:37:13,615 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 57 selfloop transitions, 12 changer transitions 0/71 dead transitions. [2024-06-21 20:37:13,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 71 transitions, 639 flow [2024-06-21 20:37:13,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:37:13,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:37:13,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 86 transitions. [2024-06-21 20:37:13,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3359375 [2024-06-21 20:37:13,616 INFO L175 Difference]: Start difference. First operand has 83 places, 65 transitions, 487 flow. Second operand 8 states and 86 transitions. [2024-06-21 20:37:13,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 71 transitions, 639 flow [2024-06-21 20:37:13,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 71 transitions, 592 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 20:37:13,625 INFO L231 Difference]: Finished difference. Result has 85 places, 65 transitions, 469 flow [2024-06-21 20:37:13,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=469, PETRI_PLACES=85, PETRI_TRANSITIONS=65} [2024-06-21 20:37:13,627 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 54 predicate places. [2024-06-21 20:37:13,627 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 65 transitions, 469 flow [2024-06-21 20:37:13,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:13,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:13,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:13,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 20:37:13,628 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:13,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:13,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1857148061, now seen corresponding path program 4 times [2024-06-21 20:37:13,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:13,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346061566] [2024-06-21 20:37:13,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:13,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:13,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:14,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:14,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:14,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346061566] [2024-06-21 20:37:14,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346061566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:14,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:14,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:37:14,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025137169] [2024-06-21 20:37:14,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:14,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:37:14,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:14,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:37:14,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:37:14,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-21 20:37:14,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 65 transitions, 469 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:14,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:14,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-21 20:37:14,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:14,680 INFO L124 PetriNetUnfolderBase]: 263/478 cut-off events. [2024-06-21 20:37:14,680 INFO L125 PetriNetUnfolderBase]: For 6819/6819 co-relation queries the response was YES. [2024-06-21 20:37:14,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2323 conditions, 478 events. 263/478 cut-off events. For 6819/6819 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1796 event pairs, 54 based on Foata normal form. 3/480 useless extension candidates. Maximal degree in co-relation 2283. Up to 409 conditions per place. [2024-06-21 20:37:14,685 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 54 selfloop transitions, 22 changer transitions 0/83 dead transitions. [2024-06-21 20:37:14,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 83 transitions, 688 flow [2024-06-21 20:37:14,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:37:14,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:37:14,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 105 transitions. [2024-06-21 20:37:14,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41015625 [2024-06-21 20:37:14,687 INFO L175 Difference]: Start difference. First operand has 85 places, 65 transitions, 469 flow. Second operand 8 states and 105 transitions. [2024-06-21 20:37:14,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 83 transitions, 688 flow [2024-06-21 20:37:14,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 83 transitions, 638 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-21 20:37:14,695 INFO L231 Difference]: Finished difference. Result has 85 places, 71 transitions, 528 flow [2024-06-21 20:37:14,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=528, PETRI_PLACES=85, PETRI_TRANSITIONS=71} [2024-06-21 20:37:14,695 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 54 predicate places. [2024-06-21 20:37:14,696 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 71 transitions, 528 flow [2024-06-21 20:37:14,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:14,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:14,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:14,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 20:37:14,696 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:14,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:14,697 INFO L85 PathProgramCache]: Analyzing trace with hash -149112110, now seen corresponding path program 1 times [2024-06-21 20:37:14,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:14,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757504022] [2024-06-21 20:37:14,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:14,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:14,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:15,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:15,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:15,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757504022] [2024-06-21 20:37:15,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757504022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:15,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:15,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:37:15,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050748803] [2024-06-21 20:37:15,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:15,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:37:15,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:15,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:37:15,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:37:15,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:37:15,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 71 transitions, 528 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:15,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:15,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:37:15,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:15,749 INFO L124 PetriNetUnfolderBase]: 280/497 cut-off events. [2024-06-21 20:37:15,749 INFO L125 PetriNetUnfolderBase]: For 7332/7332 co-relation queries the response was YES. [2024-06-21 20:37:15,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2557 conditions, 497 events. 280/497 cut-off events. For 7332/7332 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1845 event pairs, 53 based on Foata normal form. 1/497 useless extension candidates. Maximal degree in co-relation 2516. Up to 422 conditions per place. [2024-06-21 20:37:15,753 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 61 selfloop transitions, 28 changer transitions 0/91 dead transitions. [2024-06-21 20:37:15,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 91 transitions, 818 flow [2024-06-21 20:37:15,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:37:15,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:37:15,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 102 transitions. [2024-06-21 20:37:15,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3984375 [2024-06-21 20:37:15,755 INFO L175 Difference]: Start difference. First operand has 85 places, 71 transitions, 528 flow. Second operand 8 states and 102 transitions. [2024-06-21 20:37:15,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 91 transitions, 818 flow [2024-06-21 20:37:15,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 91 transitions, 776 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 20:37:15,765 INFO L231 Difference]: Finished difference. Result has 88 places, 75 transitions, 579 flow [2024-06-21 20:37:15,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=579, PETRI_PLACES=88, PETRI_TRANSITIONS=75} [2024-06-21 20:37:15,765 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 57 predicate places. [2024-06-21 20:37:15,765 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 75 transitions, 579 flow [2024-06-21 20:37:15,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:15,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:15,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:15,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 20:37:15,766 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:15,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:15,767 INFO L85 PathProgramCache]: Analyzing trace with hash -148962380, now seen corresponding path program 2 times [2024-06-21 20:37:15,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:15,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367032363] [2024-06-21 20:37:15,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:15,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:15,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:16,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:16,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:16,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367032363] [2024-06-21 20:37:16,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367032363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:16,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:16,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:37:16,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812943778] [2024-06-21 20:37:16,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:16,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:37:16,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:16,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:37:16,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:37:16,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:37:16,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 75 transitions, 579 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:16,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:16,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:37:16,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:16,781 INFO L124 PetriNetUnfolderBase]: 283/502 cut-off events. [2024-06-21 20:37:16,781 INFO L125 PetriNetUnfolderBase]: For 8101/8101 co-relation queries the response was YES. [2024-06-21 20:37:16,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2644 conditions, 502 events. 283/502 cut-off events. For 8101/8101 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1871 event pairs, 53 based on Foata normal form. 1/502 useless extension candidates. Maximal degree in co-relation 2602. Up to 426 conditions per place. [2024-06-21 20:37:16,785 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 60 selfloop transitions, 28 changer transitions 0/90 dead transitions. [2024-06-21 20:37:16,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 90 transitions, 847 flow [2024-06-21 20:37:16,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:37:16,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:37:16,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 100 transitions. [2024-06-21 20:37:16,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.390625 [2024-06-21 20:37:16,787 INFO L175 Difference]: Start difference. First operand has 88 places, 75 transitions, 579 flow. Second operand 8 states and 100 transitions. [2024-06-21 20:37:16,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 90 transitions, 847 flow [2024-06-21 20:37:16,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 90 transitions, 795 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 20:37:16,798 INFO L231 Difference]: Finished difference. Result has 92 places, 77 transitions, 606 flow [2024-06-21 20:37:16,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=606, PETRI_PLACES=92, PETRI_TRANSITIONS=77} [2024-06-21 20:37:16,798 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 61 predicate places. [2024-06-21 20:37:16,799 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 77 transitions, 606 flow [2024-06-21 20:37:16,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:16,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:16,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:16,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 20:37:16,799 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:16,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:16,800 INFO L85 PathProgramCache]: Analyzing trace with hash -148962163, now seen corresponding path program 1 times [2024-06-21 20:37:16,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:16,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902116167] [2024-06-21 20:37:16,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:16,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:16,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:17,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:17,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:17,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902116167] [2024-06-21 20:37:17,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902116167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:17,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:17,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:37:17,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721722010] [2024-06-21 20:37:17,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:17,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:37:17,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:17,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:37:17,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:37:17,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:37:17,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 77 transitions, 606 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:17,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:17,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:37:17,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:17,822 INFO L124 PetriNetUnfolderBase]: 302/533 cut-off events. [2024-06-21 20:37:17,823 INFO L125 PetriNetUnfolderBase]: For 9663/9663 co-relation queries the response was YES. [2024-06-21 20:37:17,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2840 conditions, 533 events. 302/533 cut-off events. For 9663/9663 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2014 event pairs, 61 based on Foata normal form. 3/535 useless extension candidates. Maximal degree in co-relation 2796. Up to 390 conditions per place. [2024-06-21 20:37:17,827 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 64 selfloop transitions, 34 changer transitions 0/100 dead transitions. [2024-06-21 20:37:17,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 100 transitions, 930 flow [2024-06-21 20:37:17,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:37:17,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:37:17,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 107 transitions. [2024-06-21 20:37:17,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41796875 [2024-06-21 20:37:17,829 INFO L175 Difference]: Start difference. First operand has 92 places, 77 transitions, 606 flow. Second operand 8 states and 107 transitions. [2024-06-21 20:37:17,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 100 transitions, 930 flow [2024-06-21 20:37:17,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 100 transitions, 884 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 20:37:17,841 INFO L231 Difference]: Finished difference. Result has 95 places, 81 transitions, 665 flow [2024-06-21 20:37:17,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=665, PETRI_PLACES=95, PETRI_TRANSITIONS=81} [2024-06-21 20:37:17,842 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 64 predicate places. [2024-06-21 20:37:17,842 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 81 transitions, 665 flow [2024-06-21 20:37:17,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:17,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:17,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:17,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 20:37:17,843 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:17,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:17,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1742125579, now seen corresponding path program 2 times [2024-06-21 20:37:17,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:17,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419394188] [2024-06-21 20:37:17,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:17,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:17,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:18,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:18,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:18,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419394188] [2024-06-21 20:37:18,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419394188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:18,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:18,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:37:18,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820874885] [2024-06-21 20:37:18,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:18,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:37:18,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:18,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:37:18,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:37:18,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:37:18,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 81 transitions, 665 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:18,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:18,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:37:18,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:18,842 INFO L124 PetriNetUnfolderBase]: 326/572 cut-off events. [2024-06-21 20:37:18,842 INFO L125 PetriNetUnfolderBase]: For 11438/11438 co-relation queries the response was YES. [2024-06-21 20:37:18,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3183 conditions, 572 events. 326/572 cut-off events. For 11438/11438 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2191 event pairs, 59 based on Foata normal form. 3/574 useless extension candidates. Maximal degree in co-relation 3138. Up to 410 conditions per place. [2024-06-21 20:37:18,846 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 69 selfloop transitions, 33 changer transitions 0/104 dead transitions. [2024-06-21 20:37:18,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 104 transitions, 1049 flow [2024-06-21 20:37:18,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:37:18,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:37:18,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 106 transitions. [2024-06-21 20:37:18,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4140625 [2024-06-21 20:37:18,852 INFO L175 Difference]: Start difference. First operand has 95 places, 81 transitions, 665 flow. Second operand 8 states and 106 transitions. [2024-06-21 20:37:18,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 104 transitions, 1049 flow [2024-06-21 20:37:18,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 104 transitions, 1001 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 20:37:18,868 INFO L231 Difference]: Finished difference. Result has 99 places, 85 transitions, 726 flow [2024-06-21 20:37:18,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=726, PETRI_PLACES=99, PETRI_TRANSITIONS=85} [2024-06-21 20:37:18,869 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 68 predicate places. [2024-06-21 20:37:18,869 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 85 transitions, 726 flow [2024-06-21 20:37:18,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:18,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:18,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:18,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 20:37:18,870 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:18,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:18,870 INFO L85 PathProgramCache]: Analyzing trace with hash -143398190, now seen corresponding path program 3 times [2024-06-21 20:37:18,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:18,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52144958] [2024-06-21 20:37:18,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:18,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:18,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:19,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:19,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:19,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52144958] [2024-06-21 20:37:19,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52144958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:19,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:19,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:37:19,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573178565] [2024-06-21 20:37:19,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:19,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:37:19,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:19,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:37:19,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:37:19,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:37:19,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 85 transitions, 726 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:19,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:19,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:37:19,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:19,811 INFO L124 PetriNetUnfolderBase]: 329/577 cut-off events. [2024-06-21 20:37:19,811 INFO L125 PetriNetUnfolderBase]: For 12099/12099 co-relation queries the response was YES. [2024-06-21 20:37:19,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3318 conditions, 577 events. 329/577 cut-off events. For 12099/12099 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2233 event pairs, 60 based on Foata normal form. 1/577 useless extension candidates. Maximal degree in co-relation 3271. Up to 500 conditions per place. [2024-06-21 20:37:19,817 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 68 selfloop transitions, 28 changer transitions 0/98 dead transitions. [2024-06-21 20:37:19,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 98 transitions, 1008 flow [2024-06-21 20:37:19,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:37:19,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:37:19,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 98 transitions. [2024-06-21 20:37:19,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3828125 [2024-06-21 20:37:19,819 INFO L175 Difference]: Start difference. First operand has 99 places, 85 transitions, 726 flow. Second operand 8 states and 98 transitions. [2024-06-21 20:37:19,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 98 transitions, 1008 flow [2024-06-21 20:37:19,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 98 transitions, 963 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 20:37:19,838 INFO L231 Difference]: Finished difference. Result has 103 places, 87 transitions, 758 flow [2024-06-21 20:37:19,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=681, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=758, PETRI_PLACES=103, PETRI_TRANSITIONS=87} [2024-06-21 20:37:19,839 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 72 predicate places. [2024-06-21 20:37:19,839 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 87 transitions, 758 flow [2024-06-21 20:37:19,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:19,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:19,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:19,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 20:37:19,840 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:19,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:19,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1246924047, now seen corresponding path program 3 times [2024-06-21 20:37:19,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:19,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467543230] [2024-06-21 20:37:19,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:19,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:19,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:20,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:20,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:20,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467543230] [2024-06-21 20:37:20,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467543230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:20,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:20,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:37:20,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837599339] [2024-06-21 20:37:20,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:20,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:37:20,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:20,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:37:20,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:37:20,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:37:20,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 87 transitions, 758 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:20,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:20,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:37:20,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:20,862 INFO L124 PetriNetUnfolderBase]: 323/568 cut-off events. [2024-06-21 20:37:20,862 INFO L125 PetriNetUnfolderBase]: For 12873/12873 co-relation queries the response was YES. [2024-06-21 20:37:20,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3237 conditions, 568 events. 323/568 cut-off events. For 12873/12873 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2171 event pairs, 57 based on Foata normal form. 3/570 useless extension candidates. Maximal degree in co-relation 3189. Up to 411 conditions per place. [2024-06-21 20:37:20,880 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 73 selfloop transitions, 32 changer transitions 0/107 dead transitions. [2024-06-21 20:37:20,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 107 transitions, 1080 flow [2024-06-21 20:37:20,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:37:20,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:37:20,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 108 transitions. [2024-06-21 20:37:20,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2024-06-21 20:37:20,883 INFO L175 Difference]: Start difference. First operand has 103 places, 87 transitions, 758 flow. Second operand 8 states and 108 transitions. [2024-06-21 20:37:20,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 107 transitions, 1080 flow [2024-06-21 20:37:20,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 107 transitions, 1029 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 20:37:20,897 INFO L231 Difference]: Finished difference. Result has 106 places, 87 transitions, 776 flow [2024-06-21 20:37:20,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=707, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=776, PETRI_PLACES=106, PETRI_TRANSITIONS=87} [2024-06-21 20:37:20,898 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 75 predicate places. [2024-06-21 20:37:20,898 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 87 transitions, 776 flow [2024-06-21 20:37:20,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:20,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:20,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:20,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 20:37:20,899 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:20,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:20,899 INFO L85 PathProgramCache]: Analyzing trace with hash -629136563, now seen corresponding path program 4 times [2024-06-21 20:37:20,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:20,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094109343] [2024-06-21 20:37:20,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:20,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:20,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:21,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:21,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:21,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094109343] [2024-06-21 20:37:21,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094109343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:21,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:21,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:37:21,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850251770] [2024-06-21 20:37:21,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:21,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:37:21,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:21,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:37:21,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:37:21,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:37:21,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 87 transitions, 776 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:21,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:21,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:37:21,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:21,984 INFO L124 PetriNetUnfolderBase]: 332/583 cut-off events. [2024-06-21 20:37:21,985 INFO L125 PetriNetUnfolderBase]: For 14131/14131 co-relation queries the response was YES. [2024-06-21 20:37:21,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3382 conditions, 583 events. 332/583 cut-off events. For 14131/14131 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2264 event pairs, 57 based on Foata normal form. 3/585 useless extension candidates. Maximal degree in co-relation 3333. Up to 511 conditions per place. [2024-06-21 20:37:21,991 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 79 selfloop transitions, 22 changer transitions 0/103 dead transitions. [2024-06-21 20:37:21,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 103 transitions, 1088 flow [2024-06-21 20:37:21,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:37:21,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:37:21,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 105 transitions. [2024-06-21 20:37:21,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3645833333333333 [2024-06-21 20:37:21,993 INFO L175 Difference]: Start difference. First operand has 106 places, 87 transitions, 776 flow. Second operand 9 states and 105 transitions. [2024-06-21 20:37:21,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 103 transitions, 1088 flow [2024-06-21 20:37:22,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 103 transitions, 1008 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 20:37:22,013 INFO L231 Difference]: Finished difference. Result has 108 places, 89 transitions, 767 flow [2024-06-21 20:37:22,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=700, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=767, PETRI_PLACES=108, PETRI_TRANSITIONS=89} [2024-06-21 20:37:22,014 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 77 predicate places. [2024-06-21 20:37:22,014 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 89 transitions, 767 flow [2024-06-21 20:37:22,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:22,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:22,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:22,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 20:37:22,015 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:22,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:22,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1485632726, now seen corresponding path program 4 times [2024-06-21 20:37:22,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:22,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551602196] [2024-06-21 20:37:22,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:22,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:22,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:22,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:22,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:22,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551602196] [2024-06-21 20:37:22,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551602196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:22,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:22,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:37:22,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778371015] [2024-06-21 20:37:22,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:22,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:37:22,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:22,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:37:22,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:37:22,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:37:22,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 89 transitions, 767 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:22,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:22,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:37:22,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:22,960 INFO L124 PetriNetUnfolderBase]: 330/580 cut-off events. [2024-06-21 20:37:22,960 INFO L125 PetriNetUnfolderBase]: For 14075/14075 co-relation queries the response was YES. [2024-06-21 20:37:22,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3348 conditions, 580 events. 330/580 cut-off events. For 14075/14075 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2252 event pairs, 60 based on Foata normal form. 1/580 useless extension candidates. Maximal degree in co-relation 3298. Up to 559 conditions per place. [2024-06-21 20:37:22,965 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 81 selfloop transitions, 13 changer transitions 0/96 dead transitions. [2024-06-21 20:37:22,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 96 transitions, 971 flow [2024-06-21 20:37:22,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:37:22,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:37:22,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 88 transitions. [2024-06-21 20:37:22,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34375 [2024-06-21 20:37:22,966 INFO L175 Difference]: Start difference. First operand has 108 places, 89 transitions, 767 flow. Second operand 8 states and 88 transitions. [2024-06-21 20:37:22,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 96 transitions, 971 flow [2024-06-21 20:37:22,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 96 transitions, 887 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 20:37:22,989 INFO L231 Difference]: Finished difference. Result has 108 places, 89 transitions, 714 flow [2024-06-21 20:37:22,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=683, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=714, PETRI_PLACES=108, PETRI_TRANSITIONS=89} [2024-06-21 20:37:22,990 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 77 predicate places. [2024-06-21 20:37:22,990 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 89 transitions, 714 flow [2024-06-21 20:37:22,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:22,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:22,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:22,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 20:37:22,991 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:22,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:22,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1445642153, now seen corresponding path program 5 times [2024-06-21 20:37:22,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:22,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232478894] [2024-06-21 20:37:22,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:22,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:23,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:23,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:23,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:23,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232478894] [2024-06-21 20:37:23,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232478894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:23,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:23,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:37:23,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112742300] [2024-06-21 20:37:23,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:23,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:37:23,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:23,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:37:23,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:37:23,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:37:23,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 89 transitions, 714 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:23,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:23,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:37:23,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:23,963 INFO L124 PetriNetUnfolderBase]: 339/595 cut-off events. [2024-06-21 20:37:23,964 INFO L125 PetriNetUnfolderBase]: For 15622/15622 co-relation queries the response was YES. [2024-06-21 20:37:23,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3369 conditions, 595 events. 339/595 cut-off events. For 15622/15622 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2324 event pairs, 60 based on Foata normal form. 3/597 useless extension candidates. Maximal degree in co-relation 3318. Up to 516 conditions per place. [2024-06-21 20:37:23,968 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 84 selfloop transitions, 21 changer transitions 0/107 dead transitions. [2024-06-21 20:37:23,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 107 transitions, 1042 flow [2024-06-21 20:37:23,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:37:23,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:37:23,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 99 transitions. [2024-06-21 20:37:23,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38671875 [2024-06-21 20:37:23,977 INFO L175 Difference]: Start difference. First operand has 108 places, 89 transitions, 714 flow. Second operand 8 states and 99 transitions. [2024-06-21 20:37:23,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 107 transitions, 1042 flow [2024-06-21 20:37:23,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 107 transitions, 975 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-21 20:37:23,996 INFO L231 Difference]: Finished difference. Result has 106 places, 91 transitions, 711 flow [2024-06-21 20:37:23,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=647, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=711, PETRI_PLACES=106, PETRI_TRANSITIONS=91} [2024-06-21 20:37:23,996 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 75 predicate places. [2024-06-21 20:37:23,996 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 91 transitions, 711 flow [2024-06-21 20:37:23,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:23,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:23,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:23,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 20:37:23,997 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:23,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:23,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1445901623, now seen corresponding path program 6 times [2024-06-21 20:37:23,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:23,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330138194] [2024-06-21 20:37:23,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:23,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:24,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:24,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:24,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:24,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330138194] [2024-06-21 20:37:24,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330138194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:24,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:24,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:37:24,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748433250] [2024-06-21 20:37:24,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:24,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:37:24,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:24,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:37:24,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:37:24,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:37:24,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 91 transitions, 711 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:24,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:24,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:37:24,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:24,956 INFO L124 PetriNetUnfolderBase]: 333/586 cut-off events. [2024-06-21 20:37:24,956 INFO L125 PetriNetUnfolderBase]: For 15717/15717 co-relation queries the response was YES. [2024-06-21 20:37:24,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3297 conditions, 586 events. 333/586 cut-off events. For 15717/15717 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2295 event pairs, 59 based on Foata normal form. 3/588 useless extension candidates. Maximal degree in co-relation 3246. Up to 549 conditions per place. [2024-06-21 20:37:24,959 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 86 selfloop transitions, 14 changer transitions 0/102 dead transitions. [2024-06-21 20:37:24,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 102 transitions, 941 flow [2024-06-21 20:37:24,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:37:24,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:37:24,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 92 transitions. [2024-06-21 20:37:24,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.359375 [2024-06-21 20:37:24,960 INFO L175 Difference]: Start difference. First operand has 106 places, 91 transitions, 711 flow. Second operand 8 states and 92 transitions. [2024-06-21 20:37:24,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 102 transitions, 941 flow [2024-06-21 20:37:24,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 102 transitions, 897 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 20:37:24,984 INFO L231 Difference]: Finished difference. Result has 109 places, 91 transitions, 701 flow [2024-06-21 20:37:24,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=701, PETRI_PLACES=109, PETRI_TRANSITIONS=91} [2024-06-21 20:37:24,985 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 78 predicate places. [2024-06-21 20:37:24,985 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 91 transitions, 701 flow [2024-06-21 20:37:24,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:24,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:24,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:24,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 20:37:24,986 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:24,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:24,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1476418720, now seen corresponding path program 1 times [2024-06-21 20:37:24,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:24,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316799030] [2024-06-21 20:37:24,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:24,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:25,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:25,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:25,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:25,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316799030] [2024-06-21 20:37:25,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316799030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:25,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:25,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:37:25,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423694802] [2024-06-21 20:37:25,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:25,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:37:25,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:25,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:37:25,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:37:25,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-21 20:37:25,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 91 transitions, 701 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:25,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:25,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-21 20:37:25,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:26,290 INFO L124 PetriNetUnfolderBase]: 304/555 cut-off events. [2024-06-21 20:37:26,291 INFO L125 PetriNetUnfolderBase]: For 15654/15654 co-relation queries the response was YES. [2024-06-21 20:37:26,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3092 conditions, 555 events. 304/555 cut-off events. For 15654/15654 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2227 event pairs, 53 based on Foata normal form. 2/556 useless extension candidates. Maximal degree in co-relation 3040. Up to 485 conditions per place. [2024-06-21 20:37:26,295 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 76 selfloop transitions, 13 changer transitions 0/102 dead transitions. [2024-06-21 20:37:26,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 102 transitions, 921 flow [2024-06-21 20:37:26,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:37:26,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:37:26,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 97 transitions. [2024-06-21 20:37:26,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37890625 [2024-06-21 20:37:26,296 INFO L175 Difference]: Start difference. First operand has 109 places, 91 transitions, 701 flow. Second operand 8 states and 97 transitions. [2024-06-21 20:37:26,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 102 transitions, 921 flow [2024-06-21 20:37:26,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 102 transitions, 876 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 20:37:26,322 INFO L231 Difference]: Finished difference. Result has 109 places, 93 transitions, 713 flow [2024-06-21 20:37:26,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=713, PETRI_PLACES=109, PETRI_TRANSITIONS=93} [2024-06-21 20:37:26,323 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 78 predicate places. [2024-06-21 20:37:26,323 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 93 transitions, 713 flow [2024-06-21 20:37:26,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:26,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:26,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:26,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 20:37:26,324 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:26,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:26,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1476089686, now seen corresponding path program 1 times [2024-06-21 20:37:26,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:26,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493823744] [2024-06-21 20:37:26,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:26,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:26,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:27,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:27,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:27,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493823744] [2024-06-21 20:37:27,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493823744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:27,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:27,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:37:27,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529989024] [2024-06-21 20:37:27,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:27,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:37:27,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:27,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:37:27,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:37:27,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-21 20:37:27,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 93 transitions, 713 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:27,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:27,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-21 20:37:27,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:28,321 INFO L124 PetriNetUnfolderBase]: 300/549 cut-off events. [2024-06-21 20:37:28,322 INFO L125 PetriNetUnfolderBase]: For 15815/15815 co-relation queries the response was YES. [2024-06-21 20:37:28,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3060 conditions, 549 events. 300/549 cut-off events. For 15815/15815 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2180 event pairs, 52 based on Foata normal form. 2/550 useless extension candidates. Maximal degree in co-relation 3007. Up to 482 conditions per place. [2024-06-21 20:37:28,326 INFO L140 encePairwiseOnDemand]: 24/32 looper letters, 77 selfloop transitions, 12 changer transitions 0/102 dead transitions. [2024-06-21 20:37:28,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 102 transitions, 911 flow [2024-06-21 20:37:28,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:37:28,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:37:28,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 95 transitions. [2024-06-21 20:37:28,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37109375 [2024-06-21 20:37:28,327 INFO L175 Difference]: Start difference. First operand has 109 places, 93 transitions, 713 flow. Second operand 8 states and 95 transitions. [2024-06-21 20:37:28,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 102 transitions, 911 flow [2024-06-21 20:37:28,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 102 transitions, 867 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 20:37:28,348 INFO L231 Difference]: Finished difference. Result has 111 places, 93 transitions, 697 flow [2024-06-21 20:37:28,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=669, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=697, PETRI_PLACES=111, PETRI_TRANSITIONS=93} [2024-06-21 20:37:28,348 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 80 predicate places. [2024-06-21 20:37:28,349 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 93 transitions, 697 flow [2024-06-21 20:37:28,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:28,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:28,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:28,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 20:37:28,349 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:28,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:28,350 INFO L85 PathProgramCache]: Analyzing trace with hash -177317464, now seen corresponding path program 1 times [2024-06-21 20:37:28,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:28,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852623705] [2024-06-21 20:37:28,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:28,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:28,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:29,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:29,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:29,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852623705] [2024-06-21 20:37:29,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852623705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:29,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:29,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:37:29,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412686416] [2024-06-21 20:37:29,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:29,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:37:29,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:29,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:37:29,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:37:29,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:37:29,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 93 transitions, 697 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:29,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:29,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:37:29,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:29,587 INFO L124 PetriNetUnfolderBase]: 329/580 cut-off events. [2024-06-21 20:37:29,587 INFO L125 PetriNetUnfolderBase]: For 16572/16572 co-relation queries the response was YES. [2024-06-21 20:37:29,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3229 conditions, 580 events. 329/580 cut-off events. For 16572/16572 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2254 event pairs, 52 based on Foata normal form. 1/580 useless extension candidates. Maximal degree in co-relation 3175. Up to 527 conditions per place. [2024-06-21 20:37:29,592 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 94 selfloop transitions, 18 changer transitions 0/114 dead transitions. [2024-06-21 20:37:29,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 114 transitions, 997 flow [2024-06-21 20:37:29,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:37:29,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:37:29,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 109 transitions. [2024-06-21 20:37:29,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3784722222222222 [2024-06-21 20:37:29,594 INFO L175 Difference]: Start difference. First operand has 111 places, 93 transitions, 697 flow. Second operand 9 states and 109 transitions. [2024-06-21 20:37:29,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 114 transitions, 997 flow [2024-06-21 20:37:29,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 114 transitions, 969 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 20:37:29,621 INFO L231 Difference]: Finished difference. Result has 114 places, 95 transitions, 730 flow [2024-06-21 20:37:29,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=669, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=730, PETRI_PLACES=114, PETRI_TRANSITIONS=95} [2024-06-21 20:37:29,622 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 83 predicate places. [2024-06-21 20:37:29,622 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 95 transitions, 730 flow [2024-06-21 20:37:29,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:29,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:29,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:29,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 20:37:29,623 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:29,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:29,623 INFO L85 PathProgramCache]: Analyzing trace with hash -177197308, now seen corresponding path program 1 times [2024-06-21 20:37:29,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:29,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310424489] [2024-06-21 20:37:29,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:29,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:29,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:30,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:30,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:30,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310424489] [2024-06-21 20:37:30,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310424489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:30,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:30,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:37:30,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423837969] [2024-06-21 20:37:30,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:30,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:37:30,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:30,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:37:30,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:37:30,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:37:30,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 95 transitions, 730 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:30,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:30,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:37:30,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:30,817 INFO L124 PetriNetUnfolderBase]: 403/705 cut-off events. [2024-06-21 20:37:30,818 INFO L125 PetriNetUnfolderBase]: For 20138/20138 co-relation queries the response was YES. [2024-06-21 20:37:30,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3855 conditions, 705 events. 403/705 cut-off events. For 20138/20138 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2932 event pairs, 80 based on Foata normal form. 3/707 useless extension candidates. Maximal degree in co-relation 3800. Up to 490 conditions per place. [2024-06-21 20:37:30,824 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 89 selfloop transitions, 47 changer transitions 0/138 dead transitions. [2024-06-21 20:37:30,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 138 transitions, 1279 flow [2024-06-21 20:37:30,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:37:30,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:37:30,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-21 20:37:30,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-06-21 20:37:30,825 INFO L175 Difference]: Start difference. First operand has 114 places, 95 transitions, 730 flow. Second operand 10 states and 124 transitions. [2024-06-21 20:37:30,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 138 transitions, 1279 flow [2024-06-21 20:37:30,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 138 transitions, 1226 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 20:37:30,865 INFO L231 Difference]: Finished difference. Result has 120 places, 114 transitions, 980 flow [2024-06-21 20:37:30,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=685, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=980, PETRI_PLACES=120, PETRI_TRANSITIONS=114} [2024-06-21 20:37:30,867 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 89 predicate places. [2024-06-21 20:37:30,867 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 114 transitions, 980 flow [2024-06-21 20:37:30,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:30,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:30,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:30,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 20:37:30,868 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:30,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:30,868 INFO L85 PathProgramCache]: Analyzing trace with hash -327507154, now seen corresponding path program 2 times [2024-06-21 20:37:30,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:30,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620092666] [2024-06-21 20:37:30,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:30,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:30,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:31,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:31,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:31,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620092666] [2024-06-21 20:37:31,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620092666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:31,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:31,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:37:31,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722680568] [2024-06-21 20:37:31,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:31,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:37:31,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:31,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:37:31,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:37:31,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:37:31,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 114 transitions, 980 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:31,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:31,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:37:31,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:31,892 INFO L124 PetriNetUnfolderBase]: 406/709 cut-off events. [2024-06-21 20:37:31,893 INFO L125 PetriNetUnfolderBase]: For 20853/20853 co-relation queries the response was YES. [2024-06-21 20:37:31,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4166 conditions, 709 events. 406/709 cut-off events. For 20853/20853 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2974 event pairs, 63 based on Foata normal form. 1/709 useless extension candidates. Maximal degree in co-relation 4107. Up to 580 conditions per place. [2024-06-21 20:37:31,896 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 91 selfloop transitions, 42 changer transitions 0/135 dead transitions. [2024-06-21 20:37:31,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 135 transitions, 1400 flow [2024-06-21 20:37:31,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:37:31,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:37:31,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 113 transitions. [2024-06-21 20:37:31,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3923611111111111 [2024-06-21 20:37:31,897 INFO L175 Difference]: Start difference. First operand has 120 places, 114 transitions, 980 flow. Second operand 9 states and 113 transitions. [2024-06-21 20:37:31,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 135 transitions, 1400 flow [2024-06-21 20:37:31,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 135 transitions, 1359 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 20:37:31,922 INFO L231 Difference]: Finished difference. Result has 125 places, 118 transitions, 1073 flow [2024-06-21 20:37:31,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=939, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1073, PETRI_PLACES=125, PETRI_TRANSITIONS=118} [2024-06-21 20:37:31,922 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 94 predicate places. [2024-06-21 20:37:31,922 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 118 transitions, 1073 flow [2024-06-21 20:37:31,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:31,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:31,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:31,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 20:37:31,923 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:31,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:31,923 INFO L85 PathProgramCache]: Analyzing trace with hash -322865524, now seen corresponding path program 3 times [2024-06-21 20:37:31,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:31,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506077321] [2024-06-21 20:37:31,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:31,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:31,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:32,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:32,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:32,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506077321] [2024-06-21 20:37:32,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506077321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:32,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:32,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:37:32,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220244435] [2024-06-21 20:37:32,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:32,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:37:32,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:32,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:37:32,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:37:32,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:37:32,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 118 transitions, 1073 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:32,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:32,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:37:32,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:32,979 INFO L124 PetriNetUnfolderBase]: 409/715 cut-off events. [2024-06-21 20:37:32,979 INFO L125 PetriNetUnfolderBase]: For 22218/22218 co-relation queries the response was YES. [2024-06-21 20:37:32,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4335 conditions, 715 events. 409/715 cut-off events. For 22218/22218 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3004 event pairs, 69 based on Foata normal form. 1/715 useless extension candidates. Maximal degree in co-relation 4274. Up to 584 conditions per place. [2024-06-21 20:37:32,986 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 92 selfloop transitions, 40 changer transitions 0/134 dead transitions. [2024-06-21 20:37:32,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 134 transitions, 1465 flow [2024-06-21 20:37:32,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:37:32,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:37:32,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2024-06-21 20:37:32,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3854166666666667 [2024-06-21 20:37:32,988 INFO L175 Difference]: Start difference. First operand has 125 places, 118 transitions, 1073 flow. Second operand 9 states and 111 transitions. [2024-06-21 20:37:32,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 134 transitions, 1465 flow [2024-06-21 20:37:33,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 134 transitions, 1397 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 20:37:33,029 INFO L231 Difference]: Finished difference. Result has 129 places, 120 transitions, 1115 flow [2024-06-21 20:37:33,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1009, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1115, PETRI_PLACES=129, PETRI_TRANSITIONS=120} [2024-06-21 20:37:33,030 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 98 predicate places. [2024-06-21 20:37:33,030 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 120 transitions, 1115 flow [2024-06-21 20:37:33,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:33,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:33,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:33,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 20:37:33,031 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:33,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:33,032 INFO L85 PathProgramCache]: Analyzing trace with hash -322858828, now seen corresponding path program 2 times [2024-06-21 20:37:33,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:33,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720280578] [2024-06-21 20:37:33,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:33,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:33,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:33,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:33,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:33,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720280578] [2024-06-21 20:37:33,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720280578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:33,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:33,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:37:33,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174628685] [2024-06-21 20:37:33,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:33,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:37:33,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:33,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:37:33,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:37:33,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:37:33,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 120 transitions, 1115 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:33,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:33,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:37:33,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:34,137 INFO L124 PetriNetUnfolderBase]: 467/809 cut-off events. [2024-06-21 20:37:34,137 INFO L125 PetriNetUnfolderBase]: For 31191/31191 co-relation queries the response was YES. [2024-06-21 20:37:34,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5060 conditions, 809 events. 467/809 cut-off events. For 31191/31191 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3494 event pairs, 75 based on Foata normal form. 6/814 useless extension candidates. Maximal degree in co-relation 4997. Up to 438 conditions per place. [2024-06-21 20:37:34,143 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 86 selfloop transitions, 65 changer transitions 0/153 dead transitions. [2024-06-21 20:37:34,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 153 transitions, 1721 flow [2024-06-21 20:37:34,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:37:34,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:37:34,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 122 transitions. [2024-06-21 20:37:34,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236111111111111 [2024-06-21 20:37:34,145 INFO L175 Difference]: Start difference. First operand has 129 places, 120 transitions, 1115 flow. Second operand 9 states and 122 transitions. [2024-06-21 20:37:34,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 153 transitions, 1721 flow [2024-06-21 20:37:34,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 153 transitions, 1650 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 20:37:34,188 INFO L231 Difference]: Finished difference. Result has 132 places, 130 transitions, 1282 flow [2024-06-21 20:37:34,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1044, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1282, PETRI_PLACES=132, PETRI_TRANSITIONS=130} [2024-06-21 20:37:34,188 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 101 predicate places. [2024-06-21 20:37:34,189 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 130 transitions, 1282 flow [2024-06-21 20:37:34,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:34,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:34,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:34,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 20:37:34,189 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:34,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:34,190 INFO L85 PathProgramCache]: Analyzing trace with hash -186958504, now seen corresponding path program 3 times [2024-06-21 20:37:34,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:34,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888114023] [2024-06-21 20:37:34,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:34,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:34,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:34,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:34,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:34,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888114023] [2024-06-21 20:37:34,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888114023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:34,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:34,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:37:34,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488300690] [2024-06-21 20:37:34,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:34,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:37:34,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:34,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:37:34,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:37:35,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:37:35,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 130 transitions, 1282 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:35,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:35,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:37:35,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:35,407 INFO L124 PetriNetUnfolderBase]: 470/815 cut-off events. [2024-06-21 20:37:35,407 INFO L125 PetriNetUnfolderBase]: For 31743/31743 co-relation queries the response was YES. [2024-06-21 20:37:35,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5189 conditions, 815 events. 470/815 cut-off events. For 31743/31743 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3537 event pairs, 67 based on Foata normal form. 6/820 useless extension candidates. Maximal degree in co-relation 5125. Up to 442 conditions per place. [2024-06-21 20:37:35,414 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 89 selfloop transitions, 66 changer transitions 0/157 dead transitions. [2024-06-21 20:37:35,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 157 transitions, 1836 flow [2024-06-21 20:37:35,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:37:35,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:37:35,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 125 transitions. [2024-06-21 20:37:35,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340277777777778 [2024-06-21 20:37:35,415 INFO L175 Difference]: Start difference. First operand has 132 places, 130 transitions, 1282 flow. Second operand 9 states and 125 transitions. [2024-06-21 20:37:35,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 157 transitions, 1836 flow [2024-06-21 20:37:35,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 157 transitions, 1760 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 20:37:35,476 INFO L231 Difference]: Finished difference. Result has 137 places, 132 transitions, 1369 flow [2024-06-21 20:37:35,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1210, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1369, PETRI_PLACES=137, PETRI_TRANSITIONS=132} [2024-06-21 20:37:35,477 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 106 predicate places. [2024-06-21 20:37:35,477 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 132 transitions, 1369 flow [2024-06-21 20:37:35,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:35,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:35,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:35,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 20:37:35,478 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:35,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:35,478 INFO L85 PathProgramCache]: Analyzing trace with hash -792539212, now seen corresponding path program 4 times [2024-06-21 20:37:35,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:35,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316790332] [2024-06-21 20:37:35,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:35,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:35,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:36,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:36,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:36,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316790332] [2024-06-21 20:37:36,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316790332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:36,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:36,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:37:36,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082757221] [2024-06-21 20:37:36,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:36,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:37:36,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:36,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:37:36,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:37:36,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:37:36,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 132 transitions, 1369 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:36,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:36,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:37:36,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:36,601 INFO L124 PetriNetUnfolderBase]: 503/869 cut-off events. [2024-06-21 20:37:36,601 INFO L125 PetriNetUnfolderBase]: For 35617/35617 co-relation queries the response was YES. [2024-06-21 20:37:36,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5725 conditions, 869 events. 503/869 cut-off events. For 35617/35617 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3817 event pairs, 85 based on Foata normal form. 6/874 useless extension candidates. Maximal degree in co-relation 5659. Up to 470 conditions per place. [2024-06-21 20:37:36,607 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 89 selfloop transitions, 69 changer transitions 0/160 dead transitions. [2024-06-21 20:37:36,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 160 transitions, 1977 flow [2024-06-21 20:37:36,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:37:36,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:37:36,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 120 transitions. [2024-06-21 20:37:36,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 20:37:36,609 INFO L175 Difference]: Start difference. First operand has 137 places, 132 transitions, 1369 flow. Second operand 9 states and 120 transitions. [2024-06-21 20:37:36,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 160 transitions, 1977 flow [2024-06-21 20:37:36,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 160 transitions, 1839 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 20:37:36,661 INFO L231 Difference]: Finished difference. Result has 140 places, 138 transitions, 1455 flow [2024-06-21 20:37:36,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1243, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1455, PETRI_PLACES=140, PETRI_TRANSITIONS=138} [2024-06-21 20:37:36,662 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 109 predicate places. [2024-06-21 20:37:36,662 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 138 transitions, 1455 flow [2024-06-21 20:37:36,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:36,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:36,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:36,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 20:37:36,663 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:36,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:36,663 INFO L85 PathProgramCache]: Analyzing trace with hash -59278, now seen corresponding path program 5 times [2024-06-21 20:37:36,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:36,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607329211] [2024-06-21 20:37:36,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:36,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:36,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:37,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:37,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:37,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607329211] [2024-06-21 20:37:37,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607329211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:37,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:37,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:37:37,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213607252] [2024-06-21 20:37:37,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:37,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:37:37,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:37,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:37:37,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:37:37,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:37:37,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 138 transitions, 1455 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:37,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:37,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:37:37,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:37,896 INFO L124 PetriNetUnfolderBase]: 512/884 cut-off events. [2024-06-21 20:37:37,896 INFO L125 PetriNetUnfolderBase]: For 35732/35732 co-relation queries the response was YES. [2024-06-21 20:37:37,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5858 conditions, 884 events. 512/884 cut-off events. For 35732/35732 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3903 event pairs, 122 based on Foata normal form. 3/886 useless extension candidates. Maximal degree in co-relation 5791. Up to 629 conditions per place. [2024-06-21 20:37:37,901 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 120 selfloop transitions, 45 changer transitions 0/167 dead transitions. [2024-06-21 20:37:37,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 167 transitions, 2086 flow [2024-06-21 20:37:37,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:37:37,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:37:37,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 129 transitions. [2024-06-21 20:37:37,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.403125 [2024-06-21 20:37:37,904 INFO L175 Difference]: Start difference. First operand has 140 places, 138 transitions, 1455 flow. Second operand 10 states and 129 transitions. [2024-06-21 20:37:37,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 167 transitions, 2086 flow [2024-06-21 20:37:37,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 167 transitions, 1975 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 20:37:37,945 INFO L231 Difference]: Finished difference. Result has 147 places, 143 transitions, 1530 flow [2024-06-21 20:37:37,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1353, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1530, PETRI_PLACES=147, PETRI_TRANSITIONS=143} [2024-06-21 20:37:37,946 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 116 predicate places. [2024-06-21 20:37:37,946 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 143 transitions, 1530 flow [2024-06-21 20:37:37,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:37,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:37,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:37,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 20:37:37,946 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:37,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:37,947 INFO L85 PathProgramCache]: Analyzing trace with hash -65974, now seen corresponding path program 4 times [2024-06-21 20:37:37,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:37,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326724483] [2024-06-21 20:37:37,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:37,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:37,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:38,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:38,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:38,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326724483] [2024-06-21 20:37:38,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326724483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:38,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:38,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:37:38,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038650011] [2024-06-21 20:37:38,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:38,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:37:38,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:38,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:37:38,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:37:38,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:37:38,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 143 transitions, 1530 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:38,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:38,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:37:38,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:38,972 INFO L124 PetriNetUnfolderBase]: 515/889 cut-off events. [2024-06-21 20:37:38,972 INFO L125 PetriNetUnfolderBase]: For 36329/36329 co-relation queries the response was YES. [2024-06-21 20:37:38,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5889 conditions, 889 events. 515/889 cut-off events. For 36329/36329 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3942 event pairs, 94 based on Foata normal form. 1/889 useless extension candidates. Maximal degree in co-relation 5819. Up to 757 conditions per place. [2024-06-21 20:37:38,978 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 112 selfloop transitions, 43 changer transitions 0/157 dead transitions. [2024-06-21 20:37:38,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 157 transitions, 1970 flow [2024-06-21 20:37:38,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:37:38,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:37:38,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 109 transitions. [2024-06-21 20:37:38,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3784722222222222 [2024-06-21 20:37:38,979 INFO L175 Difference]: Start difference. First operand has 147 places, 143 transitions, 1530 flow. Second operand 9 states and 109 transitions. [2024-06-21 20:37:38,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 157 transitions, 1970 flow [2024-06-21 20:37:39,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 157 transitions, 1903 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 20:37:39,025 INFO L231 Difference]: Finished difference. Result has 151 places, 145 transitions, 1577 flow [2024-06-21 20:37:39,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1463, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1577, PETRI_PLACES=151, PETRI_TRANSITIONS=145} [2024-06-21 20:37:39,026 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 120 predicate places. [2024-06-21 20:37:39,026 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 145 transitions, 1577 flow [2024-06-21 20:37:39,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:39,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:39,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:39,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 20:37:39,027 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:39,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:39,027 INFO L85 PathProgramCache]: Analyzing trace with hash -65788, now seen corresponding path program 6 times [2024-06-21 20:37:39,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:39,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172322126] [2024-06-21 20:37:39,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:39,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:39,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:39,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:39,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:39,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172322126] [2024-06-21 20:37:39,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172322126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:39,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:39,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:37:39,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874449547] [2024-06-21 20:37:39,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:39,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:37:39,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:39,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:37:39,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:37:39,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:37:39,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 145 transitions, 1577 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:39,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:39,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:37:39,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:40,062 INFO L124 PetriNetUnfolderBase]: 509/880 cut-off events. [2024-06-21 20:37:40,062 INFO L125 PetriNetUnfolderBase]: For 37442/37442 co-relation queries the response was YES. [2024-06-21 20:37:40,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5767 conditions, 880 events. 509/880 cut-off events. For 37442/37442 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3898 event pairs, 116 based on Foata normal form. 3/882 useless extension candidates. Maximal degree in co-relation 5696. Up to 630 conditions per place. [2024-06-21 20:37:40,068 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 120 selfloop transitions, 46 changer transitions 0/168 dead transitions. [2024-06-21 20:37:40,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 168 transitions, 2081 flow [2024-06-21 20:37:40,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:37:40,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:37:40,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2024-06-21 20:37:40,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-21 20:37:40,069 INFO L175 Difference]: Start difference. First operand has 151 places, 145 transitions, 1577 flow. Second operand 10 states and 127 transitions. [2024-06-21 20:37:40,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 168 transitions, 2081 flow [2024-06-21 20:37:40,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 168 transitions, 1993 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 20:37:40,125 INFO L231 Difference]: Finished difference. Result has 155 places, 145 transitions, 1590 flow [2024-06-21 20:37:40,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1493, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1590, PETRI_PLACES=155, PETRI_TRANSITIONS=145} [2024-06-21 20:37:40,126 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 124 predicate places. [2024-06-21 20:37:40,126 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 145 transitions, 1590 flow [2024-06-21 20:37:40,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:40,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:40,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:40,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 20:37:40,126 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:40,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:40,127 INFO L85 PathProgramCache]: Analyzing trace with hash -2038032830, now seen corresponding path program 7 times [2024-06-21 20:37:40,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:40,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895387821] [2024-06-21 20:37:40,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:40,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:40,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:40,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:40,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:40,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895387821] [2024-06-21 20:37:40,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895387821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:40,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:40,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:37:40,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166743553] [2024-06-21 20:37:40,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:40,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:37:40,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:40,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:37:40,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:37:40,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:37:40,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 145 transitions, 1590 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:40,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:40,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:37:40,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:41,156 INFO L124 PetriNetUnfolderBase]: 518/895 cut-off events. [2024-06-21 20:37:41,156 INFO L125 PetriNetUnfolderBase]: For 39226/39226 co-relation queries the response was YES. [2024-06-21 20:37:41,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5937 conditions, 895 events. 518/895 cut-off events. For 39226/39226 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3972 event pairs, 123 based on Foata normal form. 3/897 useless extension candidates. Maximal degree in co-relation 5865. Up to 843 conditions per place. [2024-06-21 20:37:41,162 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 143 selfloop transitions, 16 changer transitions 0/161 dead transitions. [2024-06-21 20:37:41,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 161 transitions, 1978 flow [2024-06-21 20:37:41,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:37:41,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:37:41,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 103 transitions. [2024-06-21 20:37:41,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3576388888888889 [2024-06-21 20:37:41,163 INFO L175 Difference]: Start difference. First operand has 155 places, 145 transitions, 1590 flow. Second operand 9 states and 103 transitions. [2024-06-21 20:37:41,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 161 transitions, 1978 flow [2024-06-21 20:37:41,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 161 transitions, 1902 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 20:37:41,224 INFO L231 Difference]: Finished difference. Result has 158 places, 147 transitions, 1585 flow [2024-06-21 20:37:41,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1518, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1585, PETRI_PLACES=158, PETRI_TRANSITIONS=147} [2024-06-21 20:37:41,225 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 127 predicate places. [2024-06-21 20:37:41,225 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 147 transitions, 1585 flow [2024-06-21 20:37:41,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:41,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:41,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:41,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 20:37:41,226 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:41,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:41,226 INFO L85 PathProgramCache]: Analyzing trace with hash -818884026, now seen corresponding path program 8 times [2024-06-21 20:37:41,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:41,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88927780] [2024-06-21 20:37:41,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:41,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:41,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:41,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:41,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:41,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88927780] [2024-06-21 20:37:41,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88927780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:41,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:41,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:37:41,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89960571] [2024-06-21 20:37:41,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:41,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:37:41,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:41,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:37:41,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:37:41,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:37:41,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 147 transitions, 1585 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:41,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:41,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:37:41,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:42,196 INFO L124 PetriNetUnfolderBase]: 527/910 cut-off events. [2024-06-21 20:37:42,196 INFO L125 PetriNetUnfolderBase]: For 41022/41022 co-relation queries the response was YES. [2024-06-21 20:37:42,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6011 conditions, 910 events. 527/910 cut-off events. For 41022/41022 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4063 event pairs, 128 based on Foata normal form. 3/912 useless extension candidates. Maximal degree in co-relation 5938. Up to 785 conditions per place. [2024-06-21 20:37:42,201 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 140 selfloop transitions, 26 changer transitions 0/168 dead transitions. [2024-06-21 20:37:42,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 168 transitions, 2089 flow [2024-06-21 20:37:42,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:37:42,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:37:42,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 112 transitions. [2024-06-21 20:37:42,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-21 20:37:42,202 INFO L175 Difference]: Start difference. First operand has 158 places, 147 transitions, 1585 flow. Second operand 9 states and 112 transitions. [2024-06-21 20:37:42,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 168 transitions, 2089 flow [2024-06-21 20:37:42,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 168 transitions, 2052 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 20:37:42,267 INFO L231 Difference]: Finished difference. Result has 160 places, 149 transitions, 1635 flow [2024-06-21 20:37:42,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1548, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1635, PETRI_PLACES=160, PETRI_TRANSITIONS=149} [2024-06-21 20:37:42,268 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 129 predicate places. [2024-06-21 20:37:42,268 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 149 transitions, 1635 flow [2024-06-21 20:37:42,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:42,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:42,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:42,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 20:37:42,273 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:42,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:42,273 INFO L85 PathProgramCache]: Analyzing trace with hash -819114666, now seen corresponding path program 9 times [2024-06-21 20:37:42,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:42,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615459095] [2024-06-21 20:37:42,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:42,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:42,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:42,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:42,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:42,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615459095] [2024-06-21 20:37:42,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615459095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:42,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:42,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:37:42,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037903324] [2024-06-21 20:37:42,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:42,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:37:42,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:42,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:37:42,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:37:42,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:37:42,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 149 transitions, 1635 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:42,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:42,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:37:42,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:43,215 INFO L124 PetriNetUnfolderBase]: 536/925 cut-off events. [2024-06-21 20:37:43,215 INFO L125 PetriNetUnfolderBase]: For 43280/43280 co-relation queries the response was YES. [2024-06-21 20:37:43,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6183 conditions, 925 events. 536/925 cut-off events. For 43280/43280 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4152 event pairs, 124 based on Foata normal form. 3/927 useless extension candidates. Maximal degree in co-relation 6109. Up to 793 conditions per place. [2024-06-21 20:37:43,220 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 136 selfloop transitions, 30 changer transitions 0/168 dead transitions. [2024-06-21 20:37:43,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 168 transitions, 2135 flow [2024-06-21 20:37:43,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:37:43,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:37:43,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2024-06-21 20:37:43,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3854166666666667 [2024-06-21 20:37:43,221 INFO L175 Difference]: Start difference. First operand has 160 places, 149 transitions, 1635 flow. Second operand 9 states and 111 transitions. [2024-06-21 20:37:43,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 168 transitions, 2135 flow [2024-06-21 20:37:43,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 168 transitions, 2077 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 20:37:43,286 INFO L231 Difference]: Finished difference. Result has 163 places, 151 transitions, 1676 flow [2024-06-21 20:37:43,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1581, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1676, PETRI_PLACES=163, PETRI_TRANSITIONS=151} [2024-06-21 20:37:43,286 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 132 predicate places. [2024-06-21 20:37:43,286 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 151 transitions, 1676 flow [2024-06-21 20:37:43,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:43,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:43,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:43,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 20:37:43,287 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:43,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:43,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1190026710, now seen corresponding path program 5 times [2024-06-21 20:37:43,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:43,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235614647] [2024-06-21 20:37:43,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:43,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:43,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:43,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:43,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:43,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235614647] [2024-06-21 20:37:43,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235614647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:43,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:43,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:37:43,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793378341] [2024-06-21 20:37:43,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:43,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:37:43,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:43,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:37:43,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:37:44,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:37:44,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 151 transitions, 1676 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:44,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:44,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:37:44,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:44,253 INFO L124 PetriNetUnfolderBase]: 534/922 cut-off events. [2024-06-21 20:37:44,253 INFO L125 PetriNetUnfolderBase]: For 42419/42419 co-relation queries the response was YES. [2024-06-21 20:37:44,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6161 conditions, 922 events. 534/922 cut-off events. For 42419/42419 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4127 event pairs, 132 based on Foata normal form. 1/922 useless extension candidates. Maximal degree in co-relation 6086. Up to 896 conditions per place. [2024-06-21 20:37:44,259 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 142 selfloop transitions, 15 changer transitions 0/159 dead transitions. [2024-06-21 20:37:44,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 159 transitions, 2008 flow [2024-06-21 20:37:44,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:37:44,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:37:44,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 97 transitions. [2024-06-21 20:37:44,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3368055555555556 [2024-06-21 20:37:44,260 INFO L175 Difference]: Start difference. First operand has 163 places, 151 transitions, 1676 flow. Second operand 9 states and 97 transitions. [2024-06-21 20:37:44,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 159 transitions, 2008 flow [2024-06-21 20:37:44,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 159 transitions, 1928 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 20:37:44,333 INFO L231 Difference]: Finished difference. Result has 165 places, 151 transitions, 1631 flow [2024-06-21 20:37:44,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1596, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1631, PETRI_PLACES=165, PETRI_TRANSITIONS=151} [2024-06-21 20:37:44,334 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 134 predicate places. [2024-06-21 20:37:44,334 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 151 transitions, 1631 flow [2024-06-21 20:37:44,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:44,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:44,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:44,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 20:37:44,335 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:44,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:44,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1190026896, now seen corresponding path program 10 times [2024-06-21 20:37:44,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:44,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360502480] [2024-06-21 20:37:44,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:44,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:44,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:45,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:45,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:45,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360502480] [2024-06-21 20:37:45,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360502480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:45,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:45,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:37:45,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395530134] [2024-06-21 20:37:45,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:45,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:37:45,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:45,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:37:45,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:37:45,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:37:45,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 151 transitions, 1631 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:45,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:45,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:37:45,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:45,378 INFO L124 PetriNetUnfolderBase]: 528/913 cut-off events. [2024-06-21 20:37:45,378 INFO L125 PetriNetUnfolderBase]: For 43012/43012 co-relation queries the response was YES. [2024-06-21 20:37:45,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5957 conditions, 913 events. 528/913 cut-off events. For 43012/43012 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4090 event pairs, 118 based on Foata normal form. 3/915 useless extension candidates. Maximal degree in co-relation 5881. Up to 786 conditions per place. [2024-06-21 20:37:45,383 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 133 selfloop transitions, 32 changer transitions 0/167 dead transitions. [2024-06-21 20:37:45,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 167 transitions, 2009 flow [2024-06-21 20:37:45,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:37:45,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:37:45,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 109 transitions. [2024-06-21 20:37:45,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3784722222222222 [2024-06-21 20:37:45,384 INFO L175 Difference]: Start difference. First operand has 165 places, 151 transitions, 1631 flow. Second operand 9 states and 109 transitions. [2024-06-21 20:37:45,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 167 transitions, 2009 flow [2024-06-21 20:37:45,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 167 transitions, 1909 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-21 20:37:45,463 INFO L231 Difference]: Finished difference. Result has 164 places, 151 transitions, 1600 flow [2024-06-21 20:37:45,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1531, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1600, PETRI_PLACES=164, PETRI_TRANSITIONS=151} [2024-06-21 20:37:45,463 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 133 predicate places. [2024-06-21 20:37:45,463 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 151 transitions, 1600 flow [2024-06-21 20:37:45,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:45,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:45,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:45,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 20:37:45,464 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:45,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:45,465 INFO L85 PathProgramCache]: Analyzing trace with hash -523656208, now seen corresponding path program 1 times [2024-06-21 20:37:45,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:45,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407511669] [2024-06-21 20:37:45,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:45,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:45,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:46,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:46,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:46,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407511669] [2024-06-21 20:37:46,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407511669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:46,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:46,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:37:46,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446580330] [2024-06-21 20:37:46,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:46,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:37:46,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:46,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:37:46,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:37:46,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:37:46,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 151 transitions, 1600 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:46,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:46,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:37:46,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:46,789 INFO L124 PetriNetUnfolderBase]: 524/907 cut-off events. [2024-06-21 20:37:46,789 INFO L125 PetriNetUnfolderBase]: For 41731/41731 co-relation queries the response was YES. [2024-06-21 20:37:46,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5902 conditions, 907 events. 524/907 cut-off events. For 41731/41731 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4053 event pairs, 120 based on Foata normal form. 2/908 useless extension candidates. Maximal degree in co-relation 5825. Up to 868 conditions per place. [2024-06-21 20:37:46,794 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 146 selfloop transitions, 16 changer transitions 0/164 dead transitions. [2024-06-21 20:37:46,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 164 transitions, 1970 flow [2024-06-21 20:37:46,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:37:46,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:37:46,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 107 transitions. [2024-06-21 20:37:46,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.334375 [2024-06-21 20:37:46,796 INFO L175 Difference]: Start difference. First operand has 164 places, 151 transitions, 1600 flow. Second operand 10 states and 107 transitions. [2024-06-21 20:37:46,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 164 transitions, 1970 flow [2024-06-21 20:37:46,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 164 transitions, 1903 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 20:37:46,877 INFO L231 Difference]: Finished difference. Result has 166 places, 153 transitions, 1596 flow [2024-06-21 20:37:46,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1533, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1596, PETRI_PLACES=166, PETRI_TRANSITIONS=153} [2024-06-21 20:37:46,878 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 135 predicate places. [2024-06-21 20:37:46,878 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 153 transitions, 1596 flow [2024-06-21 20:37:46,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:46,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:46,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:46,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 20:37:46,878 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:46,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:46,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1918965822, now seen corresponding path program 11 times [2024-06-21 20:37:46,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:46,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242681665] [2024-06-21 20:37:46,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:46,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:46,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:47,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:47,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:47,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242681665] [2024-06-21 20:37:47,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242681665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:47,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:47,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:37:47,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668054259] [2024-06-21 20:37:47,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:47,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:37:47,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:47,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:37:47,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:37:47,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:37:47,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 153 transitions, 1596 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:47,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:47,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:37:47,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:47,952 INFO L124 PetriNetUnfolderBase]: 540/934 cut-off events. [2024-06-21 20:37:47,952 INFO L125 PetriNetUnfolderBase]: For 44303/44303 co-relation queries the response was YES. [2024-06-21 20:37:47,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6032 conditions, 934 events. 540/934 cut-off events. For 44303/44303 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4218 event pairs, 78 based on Foata normal form. 3/936 useless extension candidates. Maximal degree in co-relation 5954. Up to 731 conditions per place. [2024-06-21 20:37:47,958 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 138 selfloop transitions, 68 changer transitions 0/208 dead transitions. [2024-06-21 20:37:47,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 208 transitions, 2503 flow [2024-06-21 20:37:47,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:37:47,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:37:47,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2024-06-21 20:37:47,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-21 20:37:47,959 INFO L175 Difference]: Start difference. First operand has 166 places, 153 transitions, 1596 flow. Second operand 10 states and 127 transitions. [2024-06-21 20:37:47,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 208 transitions, 2503 flow [2024-06-21 20:37:48,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 208 transitions, 2456 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-21 20:37:48,053 INFO L231 Difference]: Finished difference. Result has 173 places, 189 transitions, 2194 flow [2024-06-21 20:37:48,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=1549, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2194, PETRI_PLACES=173, PETRI_TRANSITIONS=189} [2024-06-21 20:37:48,054 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 142 predicate places. [2024-06-21 20:37:48,054 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 189 transitions, 2194 flow [2024-06-21 20:37:48,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:48,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:48,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:48,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 20:37:48,054 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:48,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:48,055 INFO L85 PathProgramCache]: Analyzing trace with hash -968835354, now seen corresponding path program 12 times [2024-06-21 20:37:48,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:48,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561364386] [2024-06-21 20:37:48,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:48,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:48,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:48,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:48,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:48,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561364386] [2024-06-21 20:37:48,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561364386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:48,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:48,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:37:48,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22738181] [2024-06-21 20:37:48,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:48,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:37:48,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:48,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:37:48,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:37:48,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:37:48,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 189 transitions, 2194 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:48,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:48,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:37:48,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:49,207 INFO L124 PetriNetUnfolderBase]: 593/1023 cut-off events. [2024-06-21 20:37:49,207 INFO L125 PetriNetUnfolderBase]: For 47622/47622 co-relation queries the response was YES. [2024-06-21 20:37:49,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7029 conditions, 1023 events. 593/1023 cut-off events. For 47622/47622 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 4763 event pairs, 81 based on Foata normal form. 3/1025 useless extension candidates. Maximal degree in co-relation 6945. Up to 764 conditions per place. [2024-06-21 20:37:49,214 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 162 selfloop transitions, 70 changer transitions 0/234 dead transitions. [2024-06-21 20:37:49,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 234 transitions, 3097 flow [2024-06-21 20:37:49,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:37:49,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:37:49,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 133 transitions. [2024-06-21 20:37:49,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-06-21 20:37:49,215 INFO L175 Difference]: Start difference. First operand has 173 places, 189 transitions, 2194 flow. Second operand 10 states and 133 transitions. [2024-06-21 20:37:49,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 234 transitions, 3097 flow [2024-06-21 20:37:49,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 234 transitions, 3032 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-21 20:37:49,325 INFO L231 Difference]: Finished difference. Result has 184 places, 211 transitions, 2633 flow [2024-06-21 20:37:49,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2141, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2633, PETRI_PLACES=184, PETRI_TRANSITIONS=211} [2024-06-21 20:37:49,326 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 153 predicate places. [2024-06-21 20:37:49,326 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 211 transitions, 2633 flow [2024-06-21 20:37:49,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:49,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:49,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:49,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 20:37:49,327 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:49,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:49,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1230328966, now seen corresponding path program 13 times [2024-06-21 20:37:49,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:49,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913937630] [2024-06-21 20:37:49,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:49,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:49,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:49,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:49,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:49,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913937630] [2024-06-21 20:37:49,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913937630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:49,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:49,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:37:49,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444499359] [2024-06-21 20:37:49,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:49,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:37:49,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:49,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:37:49,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:37:50,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:37:50,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 211 transitions, 2633 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:50,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:50,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:37:50,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:50,577 INFO L124 PetriNetUnfolderBase]: 587/1014 cut-off events. [2024-06-21 20:37:50,577 INFO L125 PetriNetUnfolderBase]: For 46552/46552 co-relation queries the response was YES. [2024-06-21 20:37:50,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7140 conditions, 1014 events. 587/1014 cut-off events. For 46552/46552 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 4710 event pairs, 94 based on Foata normal form. 3/1016 useless extension candidates. Maximal degree in co-relation 7051. Up to 682 conditions per place. [2024-06-21 20:37:50,588 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 154 selfloop transitions, 84 changer transitions 0/240 dead transitions. [2024-06-21 20:37:50,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 240 transitions, 3360 flow [2024-06-21 20:37:50,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:37:50,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:37:50,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 135 transitions. [2024-06-21 20:37:50,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2024-06-21 20:37:50,589 INFO L175 Difference]: Start difference. First operand has 184 places, 211 transitions, 2633 flow. Second operand 10 states and 135 transitions. [2024-06-21 20:37:50,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 240 transitions, 3360 flow [2024-06-21 20:37:50,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 240 transitions, 3223 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-21 20:37:50,702 INFO L231 Difference]: Finished difference. Result has 192 places, 215 transitions, 2766 flow [2024-06-21 20:37:50,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2500, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2766, PETRI_PLACES=192, PETRI_TRANSITIONS=215} [2024-06-21 20:37:50,702 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 161 predicate places. [2024-06-21 20:37:50,703 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 215 transitions, 2766 flow [2024-06-21 20:37:50,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:50,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:50,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:50,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 20:37:50,703 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:50,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:50,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1986900132, now seen corresponding path program 14 times [2024-06-21 20:37:50,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:50,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559964196] [2024-06-21 20:37:50,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:50,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:50,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:51,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:51,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:51,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559964196] [2024-06-21 20:37:51,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559964196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:51,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:51,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:37:51,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215050202] [2024-06-21 20:37:51,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:51,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:37:51,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:51,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:37:51,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:37:51,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:37:51,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 215 transitions, 2766 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:51,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:51,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:37:51,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:51,936 INFO L124 PetriNetUnfolderBase]: 596/1029 cut-off events. [2024-06-21 20:37:51,936 INFO L125 PetriNetUnfolderBase]: For 48763/48763 co-relation queries the response was YES. [2024-06-21 20:37:51,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7384 conditions, 1029 events. 596/1029 cut-off events. For 48763/48763 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 4789 event pairs, 73 based on Foata normal form. 3/1031 useless extension candidates. Maximal degree in co-relation 7292. Up to 690 conditions per place. [2024-06-21 20:37:51,945 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 152 selfloop transitions, 86 changer transitions 0/240 dead transitions. [2024-06-21 20:37:51,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 240 transitions, 3470 flow [2024-06-21 20:37:51,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:37:51,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:37:51,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 132 transitions. [2024-06-21 20:37:51,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-21 20:37:51,946 INFO L175 Difference]: Start difference. First operand has 192 places, 215 transitions, 2766 flow. Second operand 10 states and 132 transitions. [2024-06-21 20:37:51,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 240 transitions, 3470 flow [2024-06-21 20:37:52,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 240 transitions, 3109 flow, removed 55 selfloop flow, removed 13 redundant places. [2024-06-21 20:37:52,076 INFO L231 Difference]: Finished difference. Result has 189 places, 218 transitions, 2627 flow [2024-06-21 20:37:52,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2418, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2627, PETRI_PLACES=189, PETRI_TRANSITIONS=218} [2024-06-21 20:37:52,077 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 158 predicate places. [2024-06-21 20:37:52,077 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 218 transitions, 2627 flow [2024-06-21 20:37:52,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:52,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:52,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:52,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 20:37:52,078 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:52,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:52,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1405088412, now seen corresponding path program 15 times [2024-06-21 20:37:52,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:52,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33437072] [2024-06-21 20:37:52,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:52,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:52,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:52,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:52,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:52,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33437072] [2024-06-21 20:37:52,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33437072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:52,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:52,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:37:52,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215928269] [2024-06-21 20:37:52,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:52,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:37:52,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:52,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:37:52,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:37:52,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:37:52,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 218 transitions, 2627 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:52,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:52,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:37:52,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:53,311 INFO L124 PetriNetUnfolderBase]: 590/1020 cut-off events. [2024-06-21 20:37:53,311 INFO L125 PetriNetUnfolderBase]: For 45965/45965 co-relation queries the response was YES. [2024-06-21 20:37:53,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6939 conditions, 1020 events. 590/1020 cut-off events. For 45965/45965 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 4748 event pairs, 73 based on Foata normal form. 3/1022 useless extension candidates. Maximal degree in co-relation 6852. Up to 686 conditions per place. [2024-06-21 20:37:53,322 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 155 selfloop transitions, 84 changer transitions 0/241 dead transitions. [2024-06-21 20:37:53,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 241 transitions, 3207 flow [2024-06-21 20:37:53,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:37:53,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:37:53,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 132 transitions. [2024-06-21 20:37:53,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-21 20:37:53,324 INFO L175 Difference]: Start difference. First operand has 189 places, 218 transitions, 2627 flow. Second operand 10 states and 132 transitions. [2024-06-21 20:37:53,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 241 transitions, 3207 flow [2024-06-21 20:37:53,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 241 transitions, 3003 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 20:37:53,431 INFO L231 Difference]: Finished difference. Result has 193 places, 218 transitions, 2598 flow [2024-06-21 20:37:53,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2423, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2598, PETRI_PLACES=193, PETRI_TRANSITIONS=218} [2024-06-21 20:37:53,431 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 162 predicate places. [2024-06-21 20:37:53,431 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 218 transitions, 2598 flow [2024-06-21 20:37:53,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:53,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:53,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:53,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 20:37:53,432 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:53,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:53,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1566595471, now seen corresponding path program 1 times [2024-06-21 20:37:53,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:53,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675877693] [2024-06-21 20:37:53,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:53,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:53,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:54,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:54,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:54,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675877693] [2024-06-21 20:37:54,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675877693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:54,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:54,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:37:54,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437968684] [2024-06-21 20:37:54,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:54,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:37:54,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:54,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:37:54,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:37:54,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:37:54,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 218 transitions, 2598 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:54,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:54,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:37:54,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:54,801 INFO L124 PetriNetUnfolderBase]: 598/1033 cut-off events. [2024-06-21 20:37:54,801 INFO L125 PetriNetUnfolderBase]: For 46417/46417 co-relation queries the response was YES. [2024-06-21 20:37:54,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7019 conditions, 1033 events. 598/1033 cut-off events. For 46417/46417 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 4851 event pairs, 86 based on Foata normal form. 1/1033 useless extension candidates. Maximal degree in co-relation 6932. Up to 937 conditions per place. [2024-06-21 20:37:54,809 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 208 selfloop transitions, 35 changer transitions 0/245 dead transitions. [2024-06-21 20:37:54,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 245 transitions, 3300 flow [2024-06-21 20:37:54,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:37:54,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:37:54,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 132 transitions. [2024-06-21 20:37:54,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 20:37:54,810 INFO L175 Difference]: Start difference. First operand has 193 places, 218 transitions, 2598 flow. Second operand 11 states and 132 transitions. [2024-06-21 20:37:54,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 245 transitions, 3300 flow [2024-06-21 20:37:54,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 245 transitions, 3079 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 20:37:54,921 INFO L231 Difference]: Finished difference. Result has 196 places, 222 transitions, 2496 flow [2024-06-21 20:37:54,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2377, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2496, PETRI_PLACES=196, PETRI_TRANSITIONS=222} [2024-06-21 20:37:54,921 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 165 predicate places. [2024-06-21 20:37:54,921 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 222 transitions, 2496 flow [2024-06-21 20:37:54,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:54,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:54,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:54,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 20:37:54,922 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:54,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:54,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1424402036, now seen corresponding path program 1 times [2024-06-21 20:37:54,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:54,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63099811] [2024-06-21 20:37:54,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:54,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:54,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:55,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:55,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:55,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63099811] [2024-06-21 20:37:55,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63099811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:55,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:55,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:37:55,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538552359] [2024-06-21 20:37:55,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:55,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:37:55,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:55,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:37:55,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:37:55,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:37:55,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 222 transitions, 2496 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:55,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:55,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:37:55,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:56,119 INFO L124 PetriNetUnfolderBase]: 607/1048 cut-off events. [2024-06-21 20:37:56,120 INFO L125 PetriNetUnfolderBase]: For 49867/49867 co-relation queries the response was YES. [2024-06-21 20:37:56,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6976 conditions, 1048 events. 607/1048 cut-off events. For 49867/49867 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 4933 event pairs, 86 based on Foata normal form. 3/1050 useless extension candidates. Maximal degree in co-relation 6889. Up to 959 conditions per place. [2024-06-21 20:37:56,128 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 211 selfloop transitions, 31 changer transitions 0/244 dead transitions. [2024-06-21 20:37:56,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 244 transitions, 3066 flow [2024-06-21 20:37:56,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:37:56,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:37:56,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 120 transitions. [2024-06-21 20:37:56,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 20:37:56,130 INFO L175 Difference]: Start difference. First operand has 196 places, 222 transitions, 2496 flow. Second operand 10 states and 120 transitions. [2024-06-21 20:37:56,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 244 transitions, 3066 flow [2024-06-21 20:37:56,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 244 transitions, 2997 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 20:37:56,254 INFO L231 Difference]: Finished difference. Result has 199 places, 224 transitions, 2522 flow [2024-06-21 20:37:56,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2427, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2522, PETRI_PLACES=199, PETRI_TRANSITIONS=224} [2024-06-21 20:37:56,255 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 168 predicate places. [2024-06-21 20:37:56,255 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 224 transitions, 2522 flow [2024-06-21 20:37:56,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:56,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:56,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:56,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 20:37:56,255 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:56,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:56,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1566505261, now seen corresponding path program 2 times [2024-06-21 20:37:56,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:56,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718827956] [2024-06-21 20:37:56,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:56,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:56,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:57,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:57,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:57,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718827956] [2024-06-21 20:37:57,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718827956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:57,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:57,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:37:57,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832056536] [2024-06-21 20:37:57,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:57,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:37:57,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:57,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:37:57,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:37:57,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:37:57,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 224 transitions, 2522 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:57,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:57,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:37:57,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:57,610 INFO L124 PetriNetUnfolderBase]: 605/1045 cut-off events. [2024-06-21 20:37:57,610 INFO L125 PetriNetUnfolderBase]: For 47444/47444 co-relation queries the response was YES. [2024-06-21 20:37:57,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6992 conditions, 1045 events. 605/1045 cut-off events. For 47444/47444 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 4916 event pairs, 86 based on Foata normal form. 1/1045 useless extension candidates. Maximal degree in co-relation 6903. Up to 962 conditions per place. [2024-06-21 20:37:57,618 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 209 selfloop transitions, 31 changer transitions 0/242 dead transitions. [2024-06-21 20:37:57,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 242 transitions, 3056 flow [2024-06-21 20:37:57,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:37:57,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:37:57,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 118 transitions. [2024-06-21 20:37:57,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36875 [2024-06-21 20:37:57,619 INFO L175 Difference]: Start difference. First operand has 199 places, 224 transitions, 2522 flow. Second operand 10 states and 118 transitions. [2024-06-21 20:37:57,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 242 transitions, 3056 flow [2024-06-21 20:37:57,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 242 transitions, 2971 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 20:37:57,749 INFO L231 Difference]: Finished difference. Result has 201 places, 224 transitions, 2504 flow [2024-06-21 20:37:57,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2437, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2504, PETRI_PLACES=201, PETRI_TRANSITIONS=224} [2024-06-21 20:37:57,749 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 170 predicate places. [2024-06-21 20:37:57,749 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 224 transitions, 2504 flow [2024-06-21 20:37:57,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:57,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:57,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:57,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 20:37:57,750 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:57,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:57,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1562780456, now seen corresponding path program 2 times [2024-06-21 20:37:57,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:57,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973890894] [2024-06-21 20:37:57,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:57,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:57,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:58,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:58,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:58,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973890894] [2024-06-21 20:37:58,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973890894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:58,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:58,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:37:58,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579847053] [2024-06-21 20:37:58,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:58,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:37:58,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:58,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:37:58,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:37:58,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:37:58,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 224 transitions, 2504 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:58,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:58,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:37:58,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:58,917 INFO L124 PetriNetUnfolderBase]: 639/1100 cut-off events. [2024-06-21 20:37:58,918 INFO L125 PetriNetUnfolderBase]: For 59916/59916 co-relation queries the response was YES. [2024-06-21 20:37:58,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7526 conditions, 1100 events. 639/1100 cut-off events. For 59916/59916 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 5211 event pairs, 63 based on Foata normal form. 3/1102 useless extension candidates. Maximal degree in co-relation 7436. Up to 403 conditions per place. [2024-06-21 20:37:58,925 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 140 selfloop transitions, 117 changer transitions 0/259 dead transitions. [2024-06-21 20:37:58,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 259 transitions, 3423 flow [2024-06-21 20:37:58,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:37:58,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:37:58,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 138 transitions. [2024-06-21 20:37:58,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-21 20:37:58,926 INFO L175 Difference]: Start difference. First operand has 201 places, 224 transitions, 2504 flow. Second operand 10 states and 138 transitions. [2024-06-21 20:37:58,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 259 transitions, 3423 flow [2024-06-21 20:37:59,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 259 transitions, 3356 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-21 20:37:59,035 INFO L231 Difference]: Finished difference. Result has 202 places, 230 transitions, 2770 flow [2024-06-21 20:37:59,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2437, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2770, PETRI_PLACES=202, PETRI_TRANSITIONS=230} [2024-06-21 20:37:59,035 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 171 predicate places. [2024-06-21 20:37:59,035 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 230 transitions, 2770 flow [2024-06-21 20:37:59,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:59,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:59,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:59,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 20:37:59,036 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:37:59,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:59,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1562786036, now seen corresponding path program 3 times [2024-06-21 20:37:59,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:59,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323860280] [2024-06-21 20:37:59,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:59,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:59,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:59,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:59,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:59,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323860280] [2024-06-21 20:37:59,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323860280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:59,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:59,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:37:59,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638014556] [2024-06-21 20:37:59,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:59,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:37:59,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:59,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:37:59,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:37:59,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:37:59,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 230 transitions, 2770 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:59,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:59,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:37:59,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:00,141 INFO L124 PetriNetUnfolderBase]: 633/1091 cut-off events. [2024-06-21 20:38:00,142 INFO L125 PetriNetUnfolderBase]: For 58502/58502 co-relation queries the response was YES. [2024-06-21 20:38:00,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7610 conditions, 1091 events. 633/1091 cut-off events. For 58502/58502 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 5185 event pairs, 61 based on Foata normal form. 3/1093 useless extension candidates. Maximal degree in co-relation 7519. Up to 399 conditions per place. [2024-06-21 20:38:00,150 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 142 selfloop transitions, 116 changer transitions 0/260 dead transitions. [2024-06-21 20:38:00,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 260 transitions, 3507 flow [2024-06-21 20:38:00,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:38:00,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:38:00,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 140 transitions. [2024-06-21 20:38:00,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 20:38:00,151 INFO L175 Difference]: Start difference. First operand has 202 places, 230 transitions, 2770 flow. Second operand 10 states and 140 transitions. [2024-06-21 20:38:00,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 260 transitions, 3507 flow [2024-06-21 20:38:00,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 260 transitions, 3364 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 20:38:00,266 INFO L231 Difference]: Finished difference. Result has 207 places, 230 transitions, 2864 flow [2024-06-21 20:38:00,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2627, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2864, PETRI_PLACES=207, PETRI_TRANSITIONS=230} [2024-06-21 20:38:00,266 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 176 predicate places. [2024-06-21 20:38:00,267 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 230 transitions, 2864 flow [2024-06-21 20:38:00,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:00,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:00,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:00,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 20:38:00,267 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:38:00,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:00,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1562786191, now seen corresponding path program 3 times [2024-06-21 20:38:00,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:00,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710062516] [2024-06-21 20:38:00,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:00,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:00,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:01,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:01,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:01,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710062516] [2024-06-21 20:38:01,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710062516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:01,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:01,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:38:01,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406524442] [2024-06-21 20:38:01,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:01,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:38:01,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:01,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:38:01,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:38:01,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:38:01,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 230 transitions, 2864 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:01,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:01,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:38:01,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:01,409 INFO L124 PetriNetUnfolderBase]: 636/1096 cut-off events. [2024-06-21 20:38:01,409 INFO L125 PetriNetUnfolderBase]: For 57341/57341 co-relation queries the response was YES. [2024-06-21 20:38:01,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7845 conditions, 1096 events. 636/1096 cut-off events. For 57341/57341 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5229 event pairs, 80 based on Foata normal form. 1/1096 useless extension candidates. Maximal degree in co-relation 7752. Up to 929 conditions per place. [2024-06-21 20:38:01,417 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 187 selfloop transitions, 59 changer transitions 0/248 dead transitions. [2024-06-21 20:38:01,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 248 transitions, 3428 flow [2024-06-21 20:38:01,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:38:01,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:38:01,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 121 transitions. [2024-06-21 20:38:01,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.378125 [2024-06-21 20:38:01,418 INFO L175 Difference]: Start difference. First operand has 207 places, 230 transitions, 2864 flow. Second operand 10 states and 121 transitions. [2024-06-21 20:38:01,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 248 transitions, 3428 flow [2024-06-21 20:38:01,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 248 transitions, 3172 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-21 20:38:01,552 INFO L231 Difference]: Finished difference. Result has 208 places, 232 transitions, 2759 flow [2024-06-21 20:38:01,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2608, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2759, PETRI_PLACES=208, PETRI_TRANSITIONS=232} [2024-06-21 20:38:01,552 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 177 predicate places. [2024-06-21 20:38:01,552 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 232 transitions, 2759 flow [2024-06-21 20:38:01,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:01,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:01,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:01,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 20:38:01,553 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:38:01,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:01,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1418889926, now seen corresponding path program 4 times [2024-06-21 20:38:01,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:01,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611562630] [2024-06-21 20:38:01,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:01,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:01,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:02,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:02,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:02,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611562630] [2024-06-21 20:38:02,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611562630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:02,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:02,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:38:02,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538593759] [2024-06-21 20:38:02,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:02,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:38:02,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:02,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:38:02,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:38:02,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:38:02,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 232 transitions, 2759 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:02,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:02,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:38:02,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:02,781 INFO L124 PetriNetUnfolderBase]: 675/1159 cut-off events. [2024-06-21 20:38:02,781 INFO L125 PetriNetUnfolderBase]: For 71725/71725 co-relation queries the response was YES. [2024-06-21 20:38:02,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8386 conditions, 1159 events. 675/1159 cut-off events. For 71725/71725 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 5569 event pairs, 71 based on Foata normal form. 3/1161 useless extension candidates. Maximal degree in co-relation 8292. Up to 436 conditions per place. [2024-06-21 20:38:02,789 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 175 selfloop transitions, 99 changer transitions 0/276 dead transitions. [2024-06-21 20:38:02,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 276 transitions, 3909 flow [2024-06-21 20:38:02,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:38:02,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:38:02,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 141 transitions. [2024-06-21 20:38:02,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440625 [2024-06-21 20:38:02,790 INFO L175 Difference]: Start difference. First operand has 208 places, 232 transitions, 2759 flow. Second operand 10 states and 141 transitions. [2024-06-21 20:38:02,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 276 transitions, 3909 flow [2024-06-21 20:38:02,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 276 transitions, 3774 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-21 20:38:02,932 INFO L231 Difference]: Finished difference. Result has 210 places, 238 transitions, 2916 flow [2024-06-21 20:38:02,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2624, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2916, PETRI_PLACES=210, PETRI_TRANSITIONS=238} [2024-06-21 20:38:02,933 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 179 predicate places. [2024-06-21 20:38:02,933 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 238 transitions, 2916 flow [2024-06-21 20:38:02,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:02,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:02,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:02,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 20:38:02,933 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:38:02,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:02,934 INFO L85 PathProgramCache]: Analyzing trace with hash -195776068, now seen corresponding path program 5 times [2024-06-21 20:38:02,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:02,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752677813] [2024-06-21 20:38:02,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:02,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:02,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:03,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:03,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:03,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752677813] [2024-06-21 20:38:03,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752677813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:03,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:03,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:38:03,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871990569] [2024-06-21 20:38:03,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:03,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:38:03,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:03,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:38:03,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:38:03,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:38:03,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 238 transitions, 2916 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:03,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:03,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:38:03,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:04,053 INFO L124 PetriNetUnfolderBase]: 669/1150 cut-off events. [2024-06-21 20:38:04,054 INFO L125 PetriNetUnfolderBase]: For 69819/69819 co-relation queries the response was YES. [2024-06-21 20:38:04,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8331 conditions, 1150 events. 669/1150 cut-off events. For 69819/69819 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 5540 event pairs, 73 based on Foata normal form. 3/1152 useless extension candidates. Maximal degree in co-relation 8236. Up to 432 conditions per place. [2024-06-21 20:38:04,064 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 164 selfloop transitions, 103 changer transitions 0/269 dead transitions. [2024-06-21 20:38:04,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 269 transitions, 3817 flow [2024-06-21 20:38:04,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:38:04,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:38:04,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 136 transitions. [2024-06-21 20:38:04,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 20:38:04,065 INFO L175 Difference]: Start difference. First operand has 210 places, 238 transitions, 2916 flow. Second operand 10 states and 136 transitions. [2024-06-21 20:38:04,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 269 transitions, 3817 flow [2024-06-21 20:38:04,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 269 transitions, 3662 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 20:38:04,199 INFO L231 Difference]: Finished difference. Result has 215 places, 238 transitions, 2977 flow [2024-06-21 20:38:04,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2761, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2977, PETRI_PLACES=215, PETRI_TRANSITIONS=238} [2024-06-21 20:38:04,200 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 184 predicate places. [2024-06-21 20:38:04,200 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 238 transitions, 2977 flow [2024-06-21 20:38:04,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:04,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:04,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:04,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 20:38:04,201 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:38:04,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:04,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1054263497, now seen corresponding path program 4 times [2024-06-21 20:38:04,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:04,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696616892] [2024-06-21 20:38:04,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:04,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:04,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:05,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:05,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:05,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696616892] [2024-06-21 20:38:05,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696616892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:05,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:05,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:38:05,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730594941] [2024-06-21 20:38:05,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:05,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:38:05,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:05,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:38:05,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:38:05,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:38:05,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 238 transitions, 2977 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:05,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:05,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:38:05,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:05,585 INFO L124 PetriNetUnfolderBase]: 672/1155 cut-off events. [2024-06-21 20:38:05,585 INFO L125 PetriNetUnfolderBase]: For 68798/68798 co-relation queries the response was YES. [2024-06-21 20:38:05,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8437 conditions, 1155 events. 672/1155 cut-off events. For 68798/68798 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 5564 event pairs, 85 based on Foata normal form. 1/1155 useless extension candidates. Maximal degree in co-relation 8341. Up to 988 conditions per place. [2024-06-21 20:38:05,594 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 199 selfloop transitions, 53 changer transitions 0/254 dead transitions. [2024-06-21 20:38:05,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 254 transitions, 3551 flow [2024-06-21 20:38:05,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:38:05,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:38:05,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-06-21 20:38:05,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.371875 [2024-06-21 20:38:05,595 INFO L175 Difference]: Start difference. First operand has 215 places, 238 transitions, 2977 flow. Second operand 10 states and 119 transitions. [2024-06-21 20:38:05,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 254 transitions, 3551 flow [2024-06-21 20:38:05,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 254 transitions, 3332 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 20:38:05,766 INFO L231 Difference]: Finished difference. Result has 216 places, 240 transitions, 2901 flow [2024-06-21 20:38:05,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2758, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2901, PETRI_PLACES=216, PETRI_TRANSITIONS=240} [2024-06-21 20:38:05,767 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 185 predicate places. [2024-06-21 20:38:05,767 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 240 transitions, 2901 flow [2024-06-21 20:38:05,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:05,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:05,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:05,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 20:38:05,768 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:38:05,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:05,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1418895506, now seen corresponding path program 6 times [2024-06-21 20:38:05,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:05,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143625651] [2024-06-21 20:38:05,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:05,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:05,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:06,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:06,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:06,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143625651] [2024-06-21 20:38:06,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143625651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:06,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:06,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:38:06,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829695559] [2024-06-21 20:38:06,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:06,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:38:06,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:06,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:38:06,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:38:06,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:38:06,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 240 transitions, 2901 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:06,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:06,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:38:06,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:06,949 INFO L124 PetriNetUnfolderBase]: 666/1146 cut-off events. [2024-06-21 20:38:06,949 INFO L125 PetriNetUnfolderBase]: For 68647/68647 co-relation queries the response was YES. [2024-06-21 20:38:06,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8116 conditions, 1146 events. 666/1146 cut-off events. For 68647/68647 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 5517 event pairs, 69 based on Foata normal form. 3/1148 useless extension candidates. Maximal degree in co-relation 8019. Up to 433 conditions per place. [2024-06-21 20:38:06,958 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 163 selfloop transitions, 107 changer transitions 0/272 dead transitions. [2024-06-21 20:38:06,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 272 transitions, 3702 flow [2024-06-21 20:38:06,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:38:06,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:38:06,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 138 transitions. [2024-06-21 20:38:06,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-21 20:38:06,961 INFO L175 Difference]: Start difference. First operand has 216 places, 240 transitions, 2901 flow. Second operand 10 states and 138 transitions. [2024-06-21 20:38:06,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 272 transitions, 3702 flow [2024-06-21 20:38:07,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 272 transitions, 3559 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-21 20:38:07,099 INFO L231 Difference]: Finished difference. Result has 218 places, 240 transitions, 2977 flow [2024-06-21 20:38:07,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2758, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2977, PETRI_PLACES=218, PETRI_TRANSITIONS=240} [2024-06-21 20:38:07,100 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 187 predicate places. [2024-06-21 20:38:07,100 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 240 transitions, 2977 flow [2024-06-21 20:38:07,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:07,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:07,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:07,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 20:38:07,101 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:38:07,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:07,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1836658, now seen corresponding path program 7 times [2024-06-21 20:38:07,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:07,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578227000] [2024-06-21 20:38:07,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:07,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:07,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:07,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:07,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:07,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578227000] [2024-06-21 20:38:07,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578227000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:07,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:07,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:38:07,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485351383] [2024-06-21 20:38:07,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:07,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:38:07,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:07,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:38:07,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:38:08,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:38:08,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 240 transitions, 2977 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:08,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:08,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:38:08,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:08,385 INFO L124 PetriNetUnfolderBase]: 705/1209 cut-off events. [2024-06-21 20:38:08,385 INFO L125 PetriNetUnfolderBase]: For 82766/82766 co-relation queries the response was YES. [2024-06-21 20:38:08,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8982 conditions, 1209 events. 705/1209 cut-off events. For 82766/82766 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 5883 event pairs, 87 based on Foata normal form. 3/1211 useless extension candidates. Maximal degree in co-relation 8884. Up to 465 conditions per place. [2024-06-21 20:38:08,397 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 188 selfloop transitions, 95 changer transitions 0/285 dead transitions. [2024-06-21 20:38:08,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 285 transitions, 4212 flow [2024-06-21 20:38:08,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:38:08,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:38:08,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 140 transitions. [2024-06-21 20:38:08,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 20:38:08,398 INFO L175 Difference]: Start difference. First operand has 218 places, 240 transitions, 2977 flow. Second operand 10 states and 140 transitions. [2024-06-21 20:38:08,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 285 transitions, 4212 flow [2024-06-21 20:38:08,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 285 transitions, 3974 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-21 20:38:08,562 INFO L231 Difference]: Finished difference. Result has 219 places, 246 transitions, 3039 flow [2024-06-21 20:38:08,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2751, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3039, PETRI_PLACES=219, PETRI_TRANSITIONS=246} [2024-06-21 20:38:08,563 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 188 predicate places. [2024-06-21 20:38:08,563 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 246 transitions, 3039 flow [2024-06-21 20:38:08,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:08,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:08,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:08,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 20:38:08,563 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:38:08,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:08,564 INFO L85 PathProgramCache]: Analyzing trace with hash -2038468, now seen corresponding path program 8 times [2024-06-21 20:38:08,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:08,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822113809] [2024-06-21 20:38:08,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:08,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:08,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:09,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:09,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:09,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822113809] [2024-06-21 20:38:09,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822113809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:09,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:09,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:38:09,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123067798] [2024-06-21 20:38:09,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:09,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:38:09,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:09,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:38:09,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:38:09,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:38:09,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 246 transitions, 3039 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:09,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:09,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:38:09,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:09,735 INFO L124 PetriNetUnfolderBase]: 714/1224 cut-off events. [2024-06-21 20:38:09,735 INFO L125 PetriNetUnfolderBase]: For 85337/85337 co-relation queries the response was YES. [2024-06-21 20:38:09,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9056 conditions, 1224 events. 714/1224 cut-off events. For 85337/85337 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 5991 event pairs, 79 based on Foata normal form. 3/1226 useless extension candidates. Maximal degree in co-relation 8957. Up to 473 conditions per place. [2024-06-21 20:38:09,746 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 180 selfloop transitions, 101 changer transitions 0/283 dead transitions. [2024-06-21 20:38:09,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 283 transitions, 4172 flow [2024-06-21 20:38:09,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:38:09,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:38:09,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 139 transitions. [2024-06-21 20:38:09,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-06-21 20:38:09,747 INFO L175 Difference]: Start difference. First operand has 219 places, 246 transitions, 3039 flow. Second operand 10 states and 139 transitions. [2024-06-21 20:38:09,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 283 transitions, 4172 flow [2024-06-21 20:38:09,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 283 transitions, 4021 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 20:38:09,914 INFO L231 Difference]: Finished difference. Result has 224 places, 248 transitions, 3132 flow [2024-06-21 20:38:09,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2892, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3132, PETRI_PLACES=224, PETRI_TRANSITIONS=248} [2024-06-21 20:38:09,914 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 193 predicate places. [2024-06-21 20:38:09,914 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 248 transitions, 3132 flow [2024-06-21 20:38:09,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:09,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:09,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:09,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 20:38:09,915 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:38:09,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:09,915 INFO L85 PathProgramCache]: Analyzing trace with hash 854593780, now seen corresponding path program 9 times [2024-06-21 20:38:09,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:09,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173647985] [2024-06-21 20:38:09,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:09,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:09,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:10,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:10,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:10,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173647985] [2024-06-21 20:38:10,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173647985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:10,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:10,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:38:10,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055305608] [2024-06-21 20:38:10,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:10,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:38:10,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:10,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:38:10,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:38:10,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:38:10,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 248 transitions, 3132 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:10,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:10,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:38:10,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:11,082 INFO L124 PetriNetUnfolderBase]: 708/1215 cut-off events. [2024-06-21 20:38:11,083 INFO L125 PetriNetUnfolderBase]: For 82619/82619 co-relation queries the response was YES. [2024-06-21 20:38:11,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8877 conditions, 1215 events. 708/1215 cut-off events. For 82619/82619 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 5932 event pairs, 87 based on Foata normal form. 3/1217 useless extension candidates. Maximal degree in co-relation 8777. Up to 469 conditions per place. [2024-06-21 20:38:11,091 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 169 selfloop transitions, 106 changer transitions 0/277 dead transitions. [2024-06-21 20:38:11,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 277 transitions, 4065 flow [2024-06-21 20:38:11,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:38:11,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:38:11,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 134 transitions. [2024-06-21 20:38:11,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-06-21 20:38:11,092 INFO L175 Difference]: Start difference. First operand has 224 places, 248 transitions, 3132 flow. Second operand 10 states and 134 transitions. [2024-06-21 20:38:11,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 277 transitions, 4065 flow [2024-06-21 20:38:11,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 277 transitions, 3851 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-21 20:38:11,272 INFO L231 Difference]: Finished difference. Result has 227 places, 248 transitions, 3138 flow [2024-06-21 20:38:11,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2918, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3138, PETRI_PLACES=227, PETRI_TRANSITIONS=248} [2024-06-21 20:38:11,273 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 196 predicate places. [2024-06-21 20:38:11,273 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 248 transitions, 3138 flow [2024-06-21 20:38:11,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:11,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:11,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:11,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 20:38:11,274 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:38:11,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:11,274 INFO L85 PathProgramCache]: Analyzing trace with hash -359041935, now seen corresponding path program 1 times [2024-06-21 20:38:11,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:11,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380451330] [2024-06-21 20:38:11,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:11,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:11,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:12,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:12,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:12,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380451330] [2024-06-21 20:38:12,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380451330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:12,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:12,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:38:12,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159419008] [2024-06-21 20:38:12,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:12,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:38:12,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:12,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:38:12,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:38:12,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-21 20:38:12,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 248 transitions, 3138 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:12,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:12,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-21 20:38:12,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:12,965 INFO L124 PetriNetUnfolderBase]: 645/1135 cut-off events. [2024-06-21 20:38:12,966 INFO L125 PetriNetUnfolderBase]: For 83701/83720 co-relation queries the response was YES. [2024-06-21 20:38:12,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8509 conditions, 1135 events. 645/1135 cut-off events. For 83701/83720 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 5704 event pairs, 82 based on Foata normal form. 3/1116 useless extension candidates. Maximal degree in co-relation 8408. Up to 986 conditions per place. [2024-06-21 20:38:12,978 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 197 selfloop transitions, 32 changer transitions 0/263 dead transitions. [2024-06-21 20:38:12,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 263 transitions, 3649 flow [2024-06-21 20:38:12,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:38:12,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:38:12,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 115 transitions. [2024-06-21 20:38:12,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3993055555555556 [2024-06-21 20:38:12,979 INFO L175 Difference]: Start difference. First operand has 227 places, 248 transitions, 3138 flow. Second operand 9 states and 115 transitions. [2024-06-21 20:38:12,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 263 transitions, 3649 flow [2024-06-21 20:38:13,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 263 transitions, 3399 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 20:38:13,176 INFO L231 Difference]: Finished difference. Result has 227 places, 250 transitions, 2990 flow [2024-06-21 20:38:13,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2888, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2990, PETRI_PLACES=227, PETRI_TRANSITIONS=250} [2024-06-21 20:38:13,176 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 196 predicate places. [2024-06-21 20:38:13,177 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 250 transitions, 2990 flow [2024-06-21 20:38:13,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:13,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:13,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:13,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 20:38:13,177 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:38:13,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:13,177 INFO L85 PathProgramCache]: Analyzing trace with hash -366676212, now seen corresponding path program 10 times [2024-06-21 20:38:13,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:13,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527544012] [2024-06-21 20:38:13,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:13,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:13,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:13,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:13,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:13,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527544012] [2024-06-21 20:38:13,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527544012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:13,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:13,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:38:13,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032584937] [2024-06-21 20:38:13,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:13,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:38:13,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:13,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:38:13,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:38:14,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:38:14,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 250 transitions, 2990 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:14,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:14,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:38:14,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:14,410 INFO L124 PetriNetUnfolderBase]: 706/1214 cut-off events. [2024-06-21 20:38:14,410 INFO L125 PetriNetUnfolderBase]: For 80277/80277 co-relation queries the response was YES. [2024-06-21 20:38:14,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8527 conditions, 1214 events. 706/1214 cut-off events. For 80277/80277 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 5956 event pairs, 77 based on Foata normal form. 3/1216 useless extension candidates. Maximal degree in co-relation 8424. Up to 473 conditions per place. [2024-06-21 20:38:14,418 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 168 selfloop transitions, 109 changer transitions 0/279 dead transitions. [2024-06-21 20:38:14,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 279 transitions, 3802 flow [2024-06-21 20:38:14,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:38:14,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:38:14,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 136 transitions. [2024-06-21 20:38:14,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 20:38:14,419 INFO L175 Difference]: Start difference. First operand has 227 places, 250 transitions, 2990 flow. Second operand 10 states and 136 transitions. [2024-06-21 20:38:14,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 279 transitions, 3802 flow [2024-06-21 20:38:14,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 279 transitions, 3687 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 20:38:14,598 INFO L231 Difference]: Finished difference. Result has 230 places, 250 transitions, 3098 flow [2024-06-21 20:38:14,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2875, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3098, PETRI_PLACES=230, PETRI_TRANSITIONS=250} [2024-06-21 20:38:14,599 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 199 predicate places. [2024-06-21 20:38:14,599 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 250 transitions, 3098 flow [2024-06-21 20:38:14,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:14,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:14,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:14,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 20:38:14,599 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:38:14,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:14,599 INFO L85 PathProgramCache]: Analyzing trace with hash -366676367, now seen corresponding path program 5 times [2024-06-21 20:38:14,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:14,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125377830] [2024-06-21 20:38:14,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:14,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:14,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:15,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:15,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:15,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125377830] [2024-06-21 20:38:15,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125377830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:15,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:15,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:38:15,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592386085] [2024-06-21 20:38:15,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:15,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:38:15,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:15,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:38:15,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:38:15,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:38:15,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 250 transitions, 3098 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:15,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:15,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:38:15,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:15,815 INFO L124 PetriNetUnfolderBase]: 709/1219 cut-off events. [2024-06-21 20:38:15,816 INFO L125 PetriNetUnfolderBase]: For 78383/78383 co-relation queries the response was YES. [2024-06-21 20:38:15,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8738 conditions, 1219 events. 709/1219 cut-off events. For 78383/78383 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 5980 event pairs, 92 based on Foata normal form. 1/1219 useless extension candidates. Maximal degree in co-relation 8635. Up to 1052 conditions per place. [2024-06-21 20:38:15,829 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 213 selfloop transitions, 49 changer transitions 0/264 dead transitions. [2024-06-21 20:38:15,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 264 transitions, 3690 flow [2024-06-21 20:38:15,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:38:15,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:38:15,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2024-06-21 20:38:15,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.365625 [2024-06-21 20:38:15,830 INFO L175 Difference]: Start difference. First operand has 230 places, 250 transitions, 3098 flow. Second operand 10 states and 117 transitions. [2024-06-21 20:38:15,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 264 transitions, 3690 flow [2024-06-21 20:38:16,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 264 transitions, 3462 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-21 20:38:16,012 INFO L231 Difference]: Finished difference. Result has 231 places, 252 transitions, 3009 flow [2024-06-21 20:38:16,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2870, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3009, PETRI_PLACES=231, PETRI_TRANSITIONS=252} [2024-06-21 20:38:16,012 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 200 predicate places. [2024-06-21 20:38:16,012 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 252 transitions, 3009 flow [2024-06-21 20:38:16,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:16,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:16,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:16,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 20:38:16,013 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:38:16,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:16,013 INFO L85 PathProgramCache]: Analyzing trace with hash 989979642, now seen corresponding path program 11 times [2024-06-21 20:38:16,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:16,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294399182] [2024-06-21 20:38:16,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:16,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:16,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:16,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:16,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:16,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294399182] [2024-06-21 20:38:16,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294399182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:16,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:16,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:38:16,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983047226] [2024-06-21 20:38:16,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:16,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:38:16,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:16,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:38:16,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:38:16,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:38:16,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 252 transitions, 3009 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:16,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:16,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:38:16,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:17,161 INFO L124 PetriNetUnfolderBase]: 733/1258 cut-off events. [2024-06-21 20:38:17,161 INFO L125 PetriNetUnfolderBase]: For 91607/91607 co-relation queries the response was YES. [2024-06-21 20:38:17,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9012 conditions, 1258 events. 733/1258 cut-off events. For 91607/91607 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 6232 event pairs, 137 based on Foata normal form. 3/1260 useless extension candidates. Maximal degree in co-relation 8908. Up to 1071 conditions per place. [2024-06-21 20:38:17,172 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 236 selfloop transitions, 40 changer transitions 0/278 dead transitions. [2024-06-21 20:38:17,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 278 transitions, 3972 flow [2024-06-21 20:38:17,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:38:17,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:38:17,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-21 20:38:17,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-06-21 20:38:17,173 INFO L175 Difference]: Start difference. First operand has 231 places, 252 transitions, 3009 flow. Second operand 10 states and 124 transitions. [2024-06-21 20:38:17,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 278 transitions, 3972 flow [2024-06-21 20:38:17,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 278 transitions, 3849 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 20:38:17,385 INFO L231 Difference]: Finished difference. Result has 233 places, 256 transitions, 3036 flow [2024-06-21 20:38:17,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2886, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3036, PETRI_PLACES=233, PETRI_TRANSITIONS=256} [2024-06-21 20:38:17,386 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 202 predicate places. [2024-06-21 20:38:17,386 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 256 transitions, 3036 flow [2024-06-21 20:38:17,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:17,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:17,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:17,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 20:38:17,387 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:38:17,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:17,387 INFO L85 PathProgramCache]: Analyzing trace with hash 632838355, now seen corresponding path program 2 times [2024-06-21 20:38:17,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:17,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621153809] [2024-06-21 20:38:17,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:17,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:17,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:18,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:18,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:18,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621153809] [2024-06-21 20:38:18,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621153809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:18,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:18,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:38:18,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240675256] [2024-06-21 20:38:18,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:18,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:38:18,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:18,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:38:18,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:38:18,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-21 20:38:18,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 256 transitions, 3036 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:18,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:18,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-21 20:38:18,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:18,870 INFO L124 PetriNetUnfolderBase]: 670/1181 cut-off events. [2024-06-21 20:38:18,871 INFO L125 PetriNetUnfolderBase]: For 93284/93299 co-relation queries the response was YES. [2024-06-21 20:38:18,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8663 conditions, 1181 events. 670/1181 cut-off events. For 93284/93299 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 6039 event pairs, 113 based on Foata normal form. 3/1164 useless extension candidates. Maximal degree in co-relation 8558. Up to 1078 conditions per place. [2024-06-21 20:38:18,883 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 220 selfloop transitions, 14 changer transitions 0/268 dead transitions. [2024-06-21 20:38:18,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 268 transitions, 3551 flow [2024-06-21 20:38:18,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:38:18,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:38:18,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 106 transitions. [2024-06-21 20:38:18,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3680555555555556 [2024-06-21 20:38:18,884 INFO L175 Difference]: Start difference. First operand has 233 places, 256 transitions, 3036 flow. Second operand 9 states and 106 transitions. [2024-06-21 20:38:18,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 268 transitions, 3551 flow [2024-06-21 20:38:19,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 268 transitions, 3315 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-21 20:38:19,091 INFO L231 Difference]: Finished difference. Result has 234 places, 258 transitions, 2864 flow [2024-06-21 20:38:19,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2800, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2864, PETRI_PLACES=234, PETRI_TRANSITIONS=258} [2024-06-21 20:38:19,091 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 203 predicate places. [2024-06-21 20:38:19,092 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 258 transitions, 2864 flow [2024-06-21 20:38:19,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:19,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:19,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:19,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 20:38:19,092 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:38:19,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:19,093 INFO L85 PathProgramCache]: Analyzing trace with hash 384676977, now seen corresponding path program 3 times [2024-06-21 20:38:19,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:19,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218863587] [2024-06-21 20:38:19,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:19,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:19,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:20,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:20,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:20,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218863587] [2024-06-21 20:38:20,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218863587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:20,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:20,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:38:20,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302207291] [2024-06-21 20:38:20,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:20,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:38:20,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:20,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:38:20,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:38:20,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-21 20:38:20,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 258 transitions, 2864 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:20,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:20,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-21 20:38:20,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:20,824 INFO L124 PetriNetUnfolderBase]: 677/1190 cut-off events. [2024-06-21 20:38:20,824 INFO L125 PetriNetUnfolderBase]: For 94949/94968 co-relation queries the response was YES. [2024-06-21 20:38:20,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8556 conditions, 1190 events. 677/1190 cut-off events. For 94949/94968 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 6079 event pairs, 107 based on Foata normal form. 3/1168 useless extension candidates. Maximal degree in co-relation 8449. Up to 1070 conditions per place. [2024-06-21 20:38:20,834 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 219 selfloop transitions, 21 changer transitions 0/274 dead transitions. [2024-06-21 20:38:20,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 274 transitions, 3404 flow [2024-06-21 20:38:20,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:38:20,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:38:20,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2024-06-21 20:38:20,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3854166666666667 [2024-06-21 20:38:20,835 INFO L175 Difference]: Start difference. First operand has 234 places, 258 transitions, 2864 flow. Second operand 9 states and 111 transitions. [2024-06-21 20:38:20,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 274 transitions, 3404 flow [2024-06-21 20:38:21,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 274 transitions, 3362 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 20:38:21,055 INFO L231 Difference]: Finished difference. Result has 239 places, 263 transitions, 2929 flow [2024-06-21 20:38:21,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2822, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2929, PETRI_PLACES=239, PETRI_TRANSITIONS=263} [2024-06-21 20:38:21,056 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 208 predicate places. [2024-06-21 20:38:21,056 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 263 transitions, 2929 flow [2024-06-21 20:38:21,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:21,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:21,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:21,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 20:38:21,056 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:38:21,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:21,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1508357900, now seen corresponding path program 12 times [2024-06-21 20:38:21,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:21,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264356921] [2024-06-21 20:38:21,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:21,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:21,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:21,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:21,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:21,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264356921] [2024-06-21 20:38:21,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264356921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:21,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:21,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:38:21,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494342626] [2024-06-21 20:38:21,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:21,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:38:21,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:21,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:38:21,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:38:21,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:38:21,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 263 transitions, 2929 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:21,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:21,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:38:21,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:22,197 INFO L124 PetriNetUnfolderBase]: 753/1294 cut-off events. [2024-06-21 20:38:22,198 INFO L125 PetriNetUnfolderBase]: For 98868/98868 co-relation queries the response was YES. [2024-06-21 20:38:22,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9233 conditions, 1294 events. 753/1294 cut-off events. For 98868/98868 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 6451 event pairs, 146 based on Foata normal form. 3/1296 useless extension candidates. Maximal degree in co-relation 9123. Up to 1229 conditions per place. [2024-06-21 20:38:22,210 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 259 selfloop transitions, 20 changer transitions 0/281 dead transitions. [2024-06-21 20:38:22,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 281 transitions, 3575 flow [2024-06-21 20:38:22,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:38:22,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:38:22,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2024-06-21 20:38:22,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35625 [2024-06-21 20:38:22,211 INFO L175 Difference]: Start difference. First operand has 239 places, 263 transitions, 2929 flow. Second operand 10 states and 114 transitions. [2024-06-21 20:38:22,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 281 transitions, 3575 flow [2024-06-21 20:38:22,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 281 transitions, 3521 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 20:38:22,427 INFO L231 Difference]: Finished difference. Result has 243 places, 265 transitions, 2953 flow [2024-06-21 20:38:22,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2875, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2953, PETRI_PLACES=243, PETRI_TRANSITIONS=265} [2024-06-21 20:38:22,428 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 212 predicate places. [2024-06-21 20:38:22,428 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 265 transitions, 2953 flow [2024-06-21 20:38:22,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:22,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:22,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:22,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 20:38:22,429 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:38:22,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:22,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1763669118, now seen corresponding path program 13 times [2024-06-21 20:38:22,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:22,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989085316] [2024-06-21 20:38:22,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:22,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:22,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:23,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:23,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:23,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989085316] [2024-06-21 20:38:23,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989085316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:23,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:23,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:38:23,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199111782] [2024-06-21 20:38:23,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:23,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:38:23,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:23,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:38:23,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:38:23,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:38:23,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 265 transitions, 2953 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:23,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:23,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:38:23,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:23,587 INFO L124 PetriNetUnfolderBase]: 762/1309 cut-off events. [2024-06-21 20:38:23,588 INFO L125 PetriNetUnfolderBase]: For 101623/101623 co-relation queries the response was YES. [2024-06-21 20:38:23,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9336 conditions, 1309 events. 762/1309 cut-off events. For 101623/101623 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 6542 event pairs, 137 based on Foata normal form. 3/1311 useless extension candidates. Maximal degree in co-relation 9227. Up to 1108 conditions per place. [2024-06-21 20:38:23,603 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 249 selfloop transitions, 40 changer transitions 0/291 dead transitions. [2024-06-21 20:38:23,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 291 transitions, 3954 flow [2024-06-21 20:38:23,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:38:23,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:38:23,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-06-21 20:38:23,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.390625 [2024-06-21 20:38:23,604 INFO L175 Difference]: Start difference. First operand has 243 places, 265 transitions, 2953 flow. Second operand 10 states and 125 transitions. [2024-06-21 20:38:23,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 291 transitions, 3954 flow [2024-06-21 20:38:23,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 291 transitions, 3890 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 20:38:23,834 INFO L231 Difference]: Finished difference. Result has 245 places, 267 transitions, 3013 flow [2024-06-21 20:38:23,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2895, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3013, PETRI_PLACES=245, PETRI_TRANSITIONS=267} [2024-06-21 20:38:23,835 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 214 predicate places. [2024-06-21 20:38:23,835 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 267 transitions, 3013 flow [2024-06-21 20:38:23,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:23,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:23,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:23,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 20:38:23,836 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:38:23,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:23,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1763876508, now seen corresponding path program 14 times [2024-06-21 20:38:23,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:23,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100553317] [2024-06-21 20:38:23,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:23,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:23,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:24,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:24,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:24,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100553317] [2024-06-21 20:38:24,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100553317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:24,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:24,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:38:24,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579170586] [2024-06-21 20:38:24,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:24,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:38:24,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:24,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:38:24,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:38:24,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:38:24,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 267 transitions, 3013 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:24,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:24,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:38:24,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:24,975 INFO L124 PetriNetUnfolderBase]: 756/1300 cut-off events. [2024-06-21 20:38:24,975 INFO L125 PetriNetUnfolderBase]: For 96833/96833 co-relation queries the response was YES. [2024-06-21 20:38:24,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9117 conditions, 1300 events. 756/1300 cut-off events. For 96833/96833 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 6510 event pairs, 133 based on Foata normal form. 3/1302 useless extension candidates. Maximal degree in co-relation 9007. Up to 1104 conditions per place. [2024-06-21 20:38:24,986 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 234 selfloop transitions, 50 changer transitions 0/286 dead transitions. [2024-06-21 20:38:24,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 286 transitions, 3793 flow [2024-06-21 20:38:24,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:38:24,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:38:24,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 122 transitions. [2024-06-21 20:38:24,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38125 [2024-06-21 20:38:24,987 INFO L175 Difference]: Start difference. First operand has 245 places, 267 transitions, 3013 flow. Second operand 10 states and 122 transitions. [2024-06-21 20:38:24,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 286 transitions, 3793 flow [2024-06-21 20:38:25,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 286 transitions, 3694 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-21 20:38:25,200 INFO L231 Difference]: Finished difference. Result has 248 places, 267 transitions, 3019 flow [2024-06-21 20:38:25,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2914, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3019, PETRI_PLACES=248, PETRI_TRANSITIONS=267} [2024-06-21 20:38:25,200 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 217 predicate places. [2024-06-21 20:38:25,200 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 267 transitions, 3019 flow [2024-06-21 20:38:25,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:25,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:25,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:25,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 20:38:25,201 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:38:25,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:25,201 INFO L85 PathProgramCache]: Analyzing trace with hash 384399930, now seen corresponding path program 15 times [2024-06-21 20:38:25,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:25,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398476407] [2024-06-21 20:38:25,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:25,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:25,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:25,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:25,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:25,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398476407] [2024-06-21 20:38:25,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398476407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:25,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:25,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:38:25,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203794573] [2024-06-21 20:38:25,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:25,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:38:25,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:25,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:38:25,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:38:26,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:38:26,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 267 transitions, 3019 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:26,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:26,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:38:26,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:26,364 INFO L124 PetriNetUnfolderBase]: 750/1291 cut-off events. [2024-06-21 20:38:26,365 INFO L125 PetriNetUnfolderBase]: For 91638/91638 co-relation queries the response was YES. [2024-06-21 20:38:26,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8868 conditions, 1291 events. 750/1291 cut-off events. For 91638/91638 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 6446 event pairs, 141 based on Foata normal form. 3/1293 useless extension candidates. Maximal degree in co-relation 8757. Up to 1100 conditions per place. [2024-06-21 20:38:26,376 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 250 selfloop transitions, 38 changer transitions 0/290 dead transitions. [2024-06-21 20:38:26,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 290 transitions, 3701 flow [2024-06-21 20:38:26,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:38:26,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:38:26,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-21 20:38:26,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-06-21 20:38:26,377 INFO L175 Difference]: Start difference. First operand has 248 places, 267 transitions, 3019 flow. Second operand 10 states and 124 transitions. [2024-06-21 20:38:26,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 290 transitions, 3701 flow [2024-06-21 20:38:26,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 290 transitions, 3596 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-21 20:38:26,591 INFO L231 Difference]: Finished difference. Result has 250 places, 267 transitions, 2996 flow [2024-06-21 20:38:26,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2914, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2996, PETRI_PLACES=250, PETRI_TRANSITIONS=267} [2024-06-21 20:38:26,591 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 219 predicate places. [2024-06-21 20:38:26,591 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 267 transitions, 2996 flow [2024-06-21 20:38:26,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:26,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:26,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:26,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 20:38:26,592 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:38:26,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:26,592 INFO L85 PathProgramCache]: Analyzing trace with hash 377042545, now seen corresponding path program 6 times [2024-06-21 20:38:26,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:26,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139320604] [2024-06-21 20:38:26,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:26,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:26,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:27,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:27,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:27,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139320604] [2024-06-21 20:38:27,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139320604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:27,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:27,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:38:27,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948094122] [2024-06-21 20:38:27,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:27,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:38:27,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:27,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:38:27,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:38:27,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:38:27,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 267 transitions, 2996 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:27,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:27,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:38:27,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:27,871 INFO L124 PetriNetUnfolderBase]: 748/1288 cut-off events. [2024-06-21 20:38:27,872 INFO L125 PetriNetUnfolderBase]: For 85195/85195 co-relation queries the response was YES. [2024-06-21 20:38:27,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8767 conditions, 1288 events. 748/1288 cut-off events. For 85195/85195 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 6427 event pairs, 151 based on Foata normal form. 1/1288 useless extension candidates. Maximal degree in co-relation 8655. Up to 1259 conditions per place. [2024-06-21 20:38:27,883 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 259 selfloop transitions, 17 changer transitions 0/278 dead transitions. [2024-06-21 20:38:27,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 278 transitions, 3604 flow [2024-06-21 20:38:27,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:38:27,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:38:27,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 106 transitions. [2024-06-21 20:38:27,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33125 [2024-06-21 20:38:27,884 INFO L175 Difference]: Start difference. First operand has 250 places, 267 transitions, 2996 flow. Second operand 10 states and 106 transitions. [2024-06-21 20:38:27,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 278 transitions, 3604 flow [2024-06-21 20:38:28,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 278 transitions, 3471 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-21 20:38:28,095 INFO L231 Difference]: Finished difference. Result has 249 places, 269 transitions, 2942 flow [2024-06-21 20:38:28,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2863, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2942, PETRI_PLACES=249, PETRI_TRANSITIONS=269} [2024-06-21 20:38:28,095 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 218 predicate places. [2024-06-21 20:38:28,096 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 269 transitions, 2942 flow [2024-06-21 20:38:28,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:28,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:28,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:28,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 20:38:28,096 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:38:28,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:28,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1497954261, now seen corresponding path program 4 times [2024-06-21 20:38:28,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:28,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906320662] [2024-06-21 20:38:28,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:28,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:28,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:29,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:29,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:29,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906320662] [2024-06-21 20:38:29,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906320662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:29,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:29,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:38:29,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659551622] [2024-06-21 20:38:29,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:29,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:38:29,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:29,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:38:29,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:38:29,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-21 20:38:29,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 269 transitions, 2942 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:29,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:29,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-21 20:38:29,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:29,604 INFO L124 PetriNetUnfolderBase]: 685/1211 cut-off events. [2024-06-21 20:38:29,604 INFO L125 PetriNetUnfolderBase]: For 91416/91431 co-relation queries the response was YES. [2024-06-21 20:38:29,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8339 conditions, 1211 events. 685/1211 cut-off events. For 91416/91431 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 6260 event pairs, 112 based on Foata normal form. 3/1193 useless extension candidates. Maximal degree in co-relation 8226. Up to 1108 conditions per place. [2024-06-21 20:38:29,615 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 232 selfloop transitions, 14 changer transitions 0/280 dead transitions. [2024-06-21 20:38:29,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 280 transitions, 3478 flow [2024-06-21 20:38:29,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:38:29,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:38:29,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 106 transitions. [2024-06-21 20:38:29,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3680555555555556 [2024-06-21 20:38:29,616 INFO L175 Difference]: Start difference. First operand has 249 places, 269 transitions, 2942 flow. Second operand 9 states and 106 transitions. [2024-06-21 20:38:29,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 280 transitions, 3478 flow [2024-06-21 20:38:29,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 280 transitions, 3415 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-21 20:38:29,884 INFO L231 Difference]: Finished difference. Result has 250 places, 270 transitions, 2933 flow [2024-06-21 20:38:29,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2879, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2933, PETRI_PLACES=250, PETRI_TRANSITIONS=270} [2024-06-21 20:38:29,884 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 219 predicate places. [2024-06-21 20:38:29,884 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 270 transitions, 2933 flow [2024-06-21 20:38:29,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:29,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:29,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:29,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 20:38:29,885 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:38:29,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:29,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1194391543, now seen corresponding path program 1 times [2024-06-21 20:38:29,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:29,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651888102] [2024-06-21 20:38:29,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:29,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:29,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:30,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:30,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:30,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651888102] [2024-06-21 20:38:30,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651888102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:30,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:30,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:38:30,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162557848] [2024-06-21 20:38:30,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:30,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:38:30,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:30,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:38:30,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:38:30,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:38:30,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 270 transitions, 2933 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:30,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:30,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:38:30,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:31,284 INFO L124 PetriNetUnfolderBase]: 756/1303 cut-off events. [2024-06-21 20:38:31,284 INFO L125 PetriNetUnfolderBase]: For 89599/89599 co-relation queries the response was YES. [2024-06-21 20:38:31,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8707 conditions, 1303 events. 756/1303 cut-off events. For 89599/89599 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 6544 event pairs, 142 based on Foata normal form. 2/1304 useless extension candidates. Maximal degree in co-relation 8593. Up to 1261 conditions per place. [2024-06-21 20:38:31,295 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 267 selfloop transitions, 17 changer transitions 0/286 dead transitions. [2024-06-21 20:38:31,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 286 transitions, 3567 flow [2024-06-21 20:38:31,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:38:31,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:38:31,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 109 transitions. [2024-06-21 20:38:31,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.340625 [2024-06-21 20:38:31,295 INFO L175 Difference]: Start difference. First operand has 250 places, 270 transitions, 2933 flow. Second operand 10 states and 109 transitions. [2024-06-21 20:38:31,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 286 transitions, 3567 flow [2024-06-21 20:38:31,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 286 transitions, 3514 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 20:38:31,505 INFO L231 Difference]: Finished difference. Result has 254 places, 274 transitions, 2964 flow [2024-06-21 20:38:31,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2880, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2964, PETRI_PLACES=254, PETRI_TRANSITIONS=274} [2024-06-21 20:38:31,505 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 223 predicate places. [2024-06-21 20:38:31,505 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 274 transitions, 2964 flow [2024-06-21 20:38:31,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:31,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:31,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:31,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 20:38:31,506 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:38:31,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:31,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1183339733, now seen corresponding path program 5 times [2024-06-21 20:38:31,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:31,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257815803] [2024-06-21 20:38:31,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:31,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:31,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:32,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:32,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:32,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257815803] [2024-06-21 20:38:32,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257815803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:32,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:32,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:38:32,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176367059] [2024-06-21 20:38:32,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:32,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:38:32,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:32,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:38:32,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:38:32,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-21 20:38:32,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 274 transitions, 2964 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:32,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:32,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-21 20:38:32,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:32,983 INFO L124 PetriNetUnfolderBase]: 692/1225 cut-off events. [2024-06-21 20:38:32,983 INFO L125 PetriNetUnfolderBase]: For 92921/92936 co-relation queries the response was YES. [2024-06-21 20:38:32,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8396 conditions, 1225 events. 692/1225 cut-off events. For 92921/92936 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 6372 event pairs, 109 based on Foata normal form. 3/1208 useless extension candidates. Maximal degree in co-relation 8280. Up to 1108 conditions per place. [2024-06-21 20:38:32,994 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 232 selfloop transitions, 18 changer transitions 0/285 dead transitions. [2024-06-21 20:38:32,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 285 transitions, 3510 flow [2024-06-21 20:38:32,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:38:32,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:38:32,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 107 transitions. [2024-06-21 20:38:32,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3715277777777778 [2024-06-21 20:38:32,996 INFO L175 Difference]: Start difference. First operand has 254 places, 274 transitions, 2964 flow. Second operand 9 states and 107 transitions. [2024-06-21 20:38:32,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 285 transitions, 3510 flow [2024-06-21 20:38:33,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 285 transitions, 3460 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 20:38:33,239 INFO L231 Difference]: Finished difference. Result has 256 places, 275 transitions, 2980 flow [2024-06-21 20:38:33,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2914, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2980, PETRI_PLACES=256, PETRI_TRANSITIONS=275} [2024-06-21 20:38:33,239 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 225 predicate places. [2024-06-21 20:38:33,239 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 275 transitions, 2980 flow [2024-06-21 20:38:33,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:33,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:33,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:33,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 20:38:33,240 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:38:33,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:33,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1182953783, now seen corresponding path program 6 times [2024-06-21 20:38:33,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:33,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701707934] [2024-06-21 20:38:33,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:33,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:33,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:34,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:34,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:34,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701707934] [2024-06-21 20:38:34,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701707934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:34,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:34,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:38:34,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742965273] [2024-06-21 20:38:34,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:34,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:38:34,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:34,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:38:34,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:38:34,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 32 [2024-06-21 20:38:34,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 275 transitions, 2980 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:34,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:34,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 32 [2024-06-21 20:38:34,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:34,686 INFO L124 PetriNetUnfolderBase]: 689/1222 cut-off events. [2024-06-21 20:38:34,686 INFO L125 PetriNetUnfolderBase]: For 88914/88927 co-relation queries the response was YES. [2024-06-21 20:38:34,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8243 conditions, 1222 events. 689/1222 cut-off events. For 88914/88927 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 6343 event pairs, 108 based on Foata normal form. 3/1207 useless extension candidates. Maximal degree in co-relation 8126. Up to 1110 conditions per place. [2024-06-21 20:38:34,697 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 236 selfloop transitions, 14 changer transitions 0/285 dead transitions. [2024-06-21 20:38:34,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 285 transitions, 3502 flow [2024-06-21 20:38:34,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:38:34,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:38:34,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 105 transitions. [2024-06-21 20:38:34,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3645833333333333 [2024-06-21 20:38:34,698 INFO L175 Difference]: Start difference. First operand has 256 places, 275 transitions, 2980 flow. Second operand 9 states and 105 transitions. [2024-06-21 20:38:34,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 285 transitions, 3502 flow [2024-06-21 20:38:34,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 285 transitions, 3448 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 20:38:34,991 INFO L231 Difference]: Finished difference. Result has 258 places, 275 transitions, 2958 flow [2024-06-21 20:38:34,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2926, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2958, PETRI_PLACES=258, PETRI_TRANSITIONS=275} [2024-06-21 20:38:34,992 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 227 predicate places. [2024-06-21 20:38:34,992 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 275 transitions, 2958 flow [2024-06-21 20:38:34,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:34,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:34,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:34,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 20:38:34,992 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:38:34,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:34,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1393783719, now seen corresponding path program 1 times [2024-06-21 20:38:34,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:34,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787545772] [2024-06-21 20:38:34,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:34,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:34,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:35,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:35,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:35,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787545772] [2024-06-21 20:38:35,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787545772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:35,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:35,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:38:35,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488024427] [2024-06-21 20:38:35,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:35,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:38:35,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:35,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:38:35,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:38:36,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:38:36,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 275 transitions, 2958 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:36,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:36,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:38:36,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:36,560 INFO L124 PetriNetUnfolderBase]: 768/1327 cut-off events. [2024-06-21 20:38:36,560 INFO L125 PetriNetUnfolderBase]: For 94261/94261 co-relation queries the response was YES. [2024-06-21 20:38:36,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8919 conditions, 1327 events. 768/1327 cut-off events. For 94261/94261 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 6742 event pairs, 84 based on Foata normal form. 2/1328 useless extension candidates. Maximal degree in co-relation 8801. Up to 1195 conditions per place. [2024-06-21 20:38:36,573 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 264 selfloop transitions, 37 changer transitions 0/303 dead transitions. [2024-06-21 20:38:36,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 303 transitions, 3848 flow [2024-06-21 20:38:36,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:38:36,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:38:36,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 141 transitions. [2024-06-21 20:38:36,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3671875 [2024-06-21 20:38:36,575 INFO L175 Difference]: Start difference. First operand has 258 places, 275 transitions, 2958 flow. Second operand 12 states and 141 transitions. [2024-06-21 20:38:36,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 303 transitions, 3848 flow [2024-06-21 20:38:36,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 303 transitions, 3773 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-21 20:38:36,818 INFO L231 Difference]: Finished difference. Result has 262 places, 277 transitions, 3015 flow [2024-06-21 20:38:36,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2883, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3015, PETRI_PLACES=262, PETRI_TRANSITIONS=277} [2024-06-21 20:38:36,819 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 231 predicate places. [2024-06-21 20:38:36,819 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 277 transitions, 3015 flow [2024-06-21 20:38:36,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:36,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:36,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:36,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 20:38:36,819 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:38:36,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:36,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1393844169, now seen corresponding path program 2 times [2024-06-21 20:38:36,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:36,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689906654] [2024-06-21 20:38:36,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:36,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:36,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:37,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:37,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:37,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689906654] [2024-06-21 20:38:37,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689906654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:37,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:37,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:38:37,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053895391] [2024-06-21 20:38:37,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:37,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:38:37,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:37,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:38:37,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:38:38,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:38:38,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 277 transitions, 3015 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:38,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:38,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:38:38,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:38,494 INFO L124 PetriNetUnfolderBase]: 772/1335 cut-off events. [2024-06-21 20:38:38,494 INFO L125 PetriNetUnfolderBase]: For 96673/96673 co-relation queries the response was YES. [2024-06-21 20:38:38,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9040 conditions, 1335 events. 772/1335 cut-off events. For 96673/96673 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 6783 event pairs, 103 based on Foata normal form. 2/1336 useless extension candidates. Maximal degree in co-relation 8921. Up to 1234 conditions per place. [2024-06-21 20:38:38,511 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 264 selfloop transitions, 36 changer transitions 0/302 dead transitions. [2024-06-21 20:38:38,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 302 transitions, 3719 flow [2024-06-21 20:38:38,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:38:38,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:38:38,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 140 transitions. [2024-06-21 20:38:38,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3645833333333333 [2024-06-21 20:38:38,517 INFO L175 Difference]: Start difference. First operand has 262 places, 277 transitions, 3015 flow. Second operand 12 states and 140 transitions. [2024-06-21 20:38:38,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 302 transitions, 3719 flow [2024-06-21 20:38:38,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 302 transitions, 3596 flow, removed 24 selfloop flow, removed 10 redundant places. [2024-06-21 20:38:38,808 INFO L231 Difference]: Finished difference. Result has 264 places, 278 transitions, 2998 flow [2024-06-21 20:38:38,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2902, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2998, PETRI_PLACES=264, PETRI_TRANSITIONS=278} [2024-06-21 20:38:38,809 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 233 predicate places. [2024-06-21 20:38:38,809 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 278 transitions, 2998 flow [2024-06-21 20:38:38,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:38,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:38,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:38,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 20:38:38,809 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:38:38,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:38,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1319818199, now seen corresponding path program 1 times [2024-06-21 20:38:38,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:38,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148231944] [2024-06-21 20:38:38,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:38,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:38,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:39,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:39,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:39,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148231944] [2024-06-21 20:38:39,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148231944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:39,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:39,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:38:39,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621715727] [2024-06-21 20:38:39,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:39,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:38:39,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:39,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:38:39,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:38:39,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:38:39,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 278 transitions, 2998 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:39,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:39,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:38:39,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:40,417 INFO L124 PetriNetUnfolderBase]: 781/1350 cut-off events. [2024-06-21 20:38:40,418 INFO L125 PetriNetUnfolderBase]: For 102527/102527 co-relation queries the response was YES. [2024-06-21 20:38:40,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9038 conditions, 1350 events. 781/1350 cut-off events. For 102527/102527 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 6883 event pairs, 102 based on Foata normal form. 3/1352 useless extension candidates. Maximal degree in co-relation 8919. Up to 1231 conditions per place. [2024-06-21 20:38:40,429 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 266 selfloop transitions, 40 changer transitions 0/308 dead transitions. [2024-06-21 20:38:40,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 308 transitions, 3736 flow [2024-06-21 20:38:40,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:38:40,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:38:40,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 152 transitions. [2024-06-21 20:38:40,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36538461538461536 [2024-06-21 20:38:40,430 INFO L175 Difference]: Start difference. First operand has 264 places, 278 transitions, 2998 flow. Second operand 13 states and 152 transitions. [2024-06-21 20:38:40,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 308 transitions, 3736 flow [2024-06-21 20:38:40,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 308 transitions, 3652 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-21 20:38:40,703 INFO L231 Difference]: Finished difference. Result has 267 places, 281 transitions, 3046 flow [2024-06-21 20:38:40,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2914, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3046, PETRI_PLACES=267, PETRI_TRANSITIONS=281} [2024-06-21 20:38:40,703 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 236 predicate places. [2024-06-21 20:38:40,703 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 281 transitions, 3046 flow [2024-06-21 20:38:40,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:40,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:40,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:40,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 20:38:40,704 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:38:40,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:40,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1396640679, now seen corresponding path program 3 times [2024-06-21 20:38:40,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:40,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974774378] [2024-06-21 20:38:40,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:40,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:40,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:41,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:41,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:41,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974774378] [2024-06-21 20:38:41,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974774378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:41,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:41,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:38:41,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359711552] [2024-06-21 20:38:41,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:41,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:38:41,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:41,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:38:41,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:38:41,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:38:41,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 281 transitions, 3046 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:41,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:41,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:38:41,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:42,336 INFO L124 PetriNetUnfolderBase]: 778/1345 cut-off events. [2024-06-21 20:38:42,336 INFO L125 PetriNetUnfolderBase]: For 94864/94864 co-relation queries the response was YES. [2024-06-21 20:38:42,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8944 conditions, 1345 events. 778/1345 cut-off events. For 94864/94864 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 6849 event pairs, 103 based on Foata normal form. 2/1346 useless extension candidates. Maximal degree in co-relation 8824. Up to 1256 conditions per place. [2024-06-21 20:38:42,346 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 267 selfloop transitions, 32 changer transitions 0/301 dead transitions. [2024-06-21 20:38:42,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 301 transitions, 3702 flow [2024-06-21 20:38:42,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:38:42,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:38:42,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2024-06-21 20:38:42,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36079545454545453 [2024-06-21 20:38:42,347 INFO L175 Difference]: Start difference. First operand has 267 places, 281 transitions, 3046 flow. Second operand 11 states and 127 transitions. [2024-06-21 20:38:42,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 301 transitions, 3702 flow [2024-06-21 20:38:42,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 301 transitions, 3582 flow, removed 23 selfloop flow, removed 11 redundant places. [2024-06-21 20:38:42,630 INFO L231 Difference]: Finished difference. Result has 267 places, 281 transitions, 2994 flow [2024-06-21 20:38:42,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2926, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2994, PETRI_PLACES=267, PETRI_TRANSITIONS=281} [2024-06-21 20:38:42,630 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 236 predicate places. [2024-06-21 20:38:42,630 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 281 transitions, 2994 flow [2024-06-21 20:38:42,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:42,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:42,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:42,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 20:38:42,631 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:38:42,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:42,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1201552889, now seen corresponding path program 2 times [2024-06-21 20:38:42,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:42,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237128915] [2024-06-21 20:38:42,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:42,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:42,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:43,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:43,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:43,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237128915] [2024-06-21 20:38:43,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237128915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:43,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:43,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:38:43,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453973384] [2024-06-21 20:38:43,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:43,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:38:43,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:43,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:38:43,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:38:43,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:38:43,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 281 transitions, 2994 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:43,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:43,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:38:43,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:44,199 INFO L124 PetriNetUnfolderBase]: 787/1360 cut-off events. [2024-06-21 20:38:44,199 INFO L125 PetriNetUnfolderBase]: For 100254/100254 co-relation queries the response was YES. [2024-06-21 20:38:44,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8974 conditions, 1360 events. 787/1360 cut-off events. For 100254/100254 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 6953 event pairs, 57 based on Foata normal form. 3/1362 useless extension candidates. Maximal degree in co-relation 8853. Up to 585 conditions per place. [2024-06-21 20:38:44,214 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 169 selfloop transitions, 142 changer transitions 0/313 dead transitions. [2024-06-21 20:38:44,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 313 transitions, 3777 flow [2024-06-21 20:38:44,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:38:44,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:38:44,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 147 transitions. [2024-06-21 20:38:44,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41761363636363635 [2024-06-21 20:38:44,216 INFO L175 Difference]: Start difference. First operand has 267 places, 281 transitions, 2994 flow. Second operand 11 states and 147 transitions. [2024-06-21 20:38:44,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 313 transitions, 3777 flow [2024-06-21 20:38:44,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 313 transitions, 3707 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-21 20:38:44,625 INFO L231 Difference]: Finished difference. Result has 268 places, 284 transitions, 3264 flow [2024-06-21 20:38:44,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2924, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3264, PETRI_PLACES=268, PETRI_TRANSITIONS=284} [2024-06-21 20:38:44,625 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 237 predicate places. [2024-06-21 20:38:44,625 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 284 transitions, 3264 flow [2024-06-21 20:38:44,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:44,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:44,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:44,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 20:38:44,626 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:38:44,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:44,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1511936623, now seen corresponding path program 3 times [2024-06-21 20:38:44,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:44,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20523175] [2024-06-21 20:38:44,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:44,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:44,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:45,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:45,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:45,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20523175] [2024-06-21 20:38:45,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20523175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:45,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:45,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:38:45,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493265736] [2024-06-21 20:38:45,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:45,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:38:45,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:45,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:38:45,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:38:45,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:38:45,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 284 transitions, 3264 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:45,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:45,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:38:45,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:46,040 INFO L124 PetriNetUnfolderBase]: 790/1365 cut-off events. [2024-06-21 20:38:46,040 INFO L125 PetriNetUnfolderBase]: For 96477/96477 co-relation queries the response was YES. [2024-06-21 20:38:46,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9415 conditions, 1365 events. 790/1365 cut-off events. For 96477/96477 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 6976 event pairs, 93 based on Foata normal form. 1/1365 useless extension candidates. Maximal degree in co-relation 9293. Up to 1028 conditions per place. [2024-06-21 20:38:46,054 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 232 selfloop transitions, 92 changer transitions 0/326 dead transitions. [2024-06-21 20:38:46,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 326 transitions, 4166 flow [2024-06-21 20:38:46,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:38:46,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:38:46,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 136 transitions. [2024-06-21 20:38:46,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-06-21 20:38:46,055 INFO L175 Difference]: Start difference. First operand has 268 places, 284 transitions, 3264 flow. Second operand 11 states and 136 transitions. [2024-06-21 20:38:46,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 326 transitions, 4166 flow [2024-06-21 20:38:46,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 326 transitions, 3817 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-21 20:38:46,337 INFO L231 Difference]: Finished difference. Result has 274 places, 309 transitions, 3424 flow [2024-06-21 20:38:46,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=2946, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3424, PETRI_PLACES=274, PETRI_TRANSITIONS=309} [2024-06-21 20:38:46,337 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 243 predicate places. [2024-06-21 20:38:46,337 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 309 transitions, 3424 flow [2024-06-21 20:38:46,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:46,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:46,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:46,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 20:38:46,338 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:38:46,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:46,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1511931973, now seen corresponding path program 4 times [2024-06-21 20:38:46,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:46,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714921527] [2024-06-21 20:38:46,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:46,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:46,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:47,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:47,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:47,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714921527] [2024-06-21 20:38:47,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714921527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:47,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:47,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:38:47,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610236062] [2024-06-21 20:38:47,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:47,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:38:47,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:47,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:38:47,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:38:47,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:38:47,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 309 transitions, 3424 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:47,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:47,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:38:47,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:47,817 INFO L124 PetriNetUnfolderBase]: 793/1370 cut-off events. [2024-06-21 20:38:47,817 INFO L125 PetriNetUnfolderBase]: For 98684/98684 co-relation queries the response was YES. [2024-06-21 20:38:47,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9517 conditions, 1370 events. 793/1370 cut-off events. For 98684/98684 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 7008 event pairs, 93 based on Foata normal form. 1/1370 useless extension candidates. Maximal degree in co-relation 9390. Up to 1024 conditions per place. [2024-06-21 20:38:47,830 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 230 selfloop transitions, 97 changer transitions 0/329 dead transitions. [2024-06-21 20:38:47,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 329 transitions, 4162 flow [2024-06-21 20:38:47,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:38:47,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:38:47,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 137 transitions. [2024-06-21 20:38:47,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38920454545454547 [2024-06-21 20:38:47,832 INFO L175 Difference]: Start difference. First operand has 274 places, 309 transitions, 3424 flow. Second operand 11 states and 137 transitions. [2024-06-21 20:38:47,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 329 transitions, 4162 flow [2024-06-21 20:38:48,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 329 transitions, 4061 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-21 20:38:48,153 INFO L231 Difference]: Finished difference. Result has 282 places, 312 transitions, 3571 flow [2024-06-21 20:38:48,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3323, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3571, PETRI_PLACES=282, PETRI_TRANSITIONS=312} [2024-06-21 20:38:48,153 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 251 predicate places. [2024-06-21 20:38:48,154 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 312 transitions, 3571 flow [2024-06-21 20:38:48,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:48,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:48,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:48,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 20:38:48,154 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:38:48,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:48,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1511931849, now seen corresponding path program 4 times [2024-06-21 20:38:48,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:48,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517674924] [2024-06-21 20:38:48,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:48,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:48,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:49,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:49,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:49,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517674924] [2024-06-21 20:38:49,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517674924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:49,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:49,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:38:49,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71114993] [2024-06-21 20:38:49,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:49,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:38:49,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:49,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:38:49,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:38:49,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:38:49,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 312 transitions, 3571 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:49,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:49,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:38:49,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:49,676 INFO L124 PetriNetUnfolderBase]: 797/1378 cut-off events. [2024-06-21 20:38:49,676 INFO L125 PetriNetUnfolderBase]: For 105024/105024 co-relation queries the response was YES. [2024-06-21 20:38:49,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9798 conditions, 1378 events. 797/1378 cut-off events. For 105024/105024 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 7092 event pairs, 84 based on Foata normal form. 2/1379 useless extension candidates. Maximal degree in co-relation 9668. Up to 1205 conditions per place. [2024-06-21 20:38:49,690 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 269 selfloop transitions, 60 changer transitions 0/331 dead transitions. [2024-06-21 20:38:49,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 331 transitions, 4307 flow [2024-06-21 20:38:49,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:38:49,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:38:49,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-06-21 20:38:49,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3693181818181818 [2024-06-21 20:38:49,691 INFO L175 Difference]: Start difference. First operand has 282 places, 312 transitions, 3571 flow. Second operand 11 states and 130 transitions. [2024-06-21 20:38:49,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 331 transitions, 4307 flow [2024-06-21 20:38:50,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 331 transitions, 4099 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 20:38:50,063 INFO L231 Difference]: Finished difference. Result has 285 places, 313 transitions, 3515 flow [2024-06-21 20:38:50,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3363, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3515, PETRI_PLACES=285, PETRI_TRANSITIONS=313} [2024-06-21 20:38:50,064 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 254 predicate places. [2024-06-21 20:38:50,064 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 313 transitions, 3515 flow [2024-06-21 20:38:50,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:50,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:50,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:50,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 20:38:50,064 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:38:50,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:50,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1677748737, now seen corresponding path program 5 times [2024-06-21 20:38:50,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:50,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308760309] [2024-06-21 20:38:50,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:50,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:50,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:50,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:50,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:50,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308760309] [2024-06-21 20:38:50,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308760309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:50,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:50,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:38:50,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765121478] [2024-06-21 20:38:50,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:50,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:38:50,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:50,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:38:50,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:38:51,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:38:51,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 313 transitions, 3515 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:51,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:51,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:38:51,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:51,413 INFO L124 PetriNetUnfolderBase]: 800/1383 cut-off events. [2024-06-21 20:38:51,413 INFO L125 PetriNetUnfolderBase]: For 103361/103361 co-relation queries the response was YES. [2024-06-21 20:38:51,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9731 conditions, 1383 events. 800/1383 cut-off events. For 103361/103361 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 7106 event pairs, 89 based on Foata normal form. 1/1383 useless extension candidates. Maximal degree in co-relation 9600. Up to 1046 conditions per place. [2024-06-21 20:38:51,426 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 252 selfloop transitions, 86 changer transitions 0/340 dead transitions. [2024-06-21 20:38:51,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 340 transitions, 4368 flow [2024-06-21 20:38:51,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:38:51,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:38:51,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 135 transitions. [2024-06-21 20:38:51,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835227272727273 [2024-06-21 20:38:51,428 INFO L175 Difference]: Start difference. First operand has 285 places, 313 transitions, 3515 flow. Second operand 11 states and 135 transitions. [2024-06-21 20:38:51,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 340 transitions, 4368 flow [2024-06-21 20:38:51,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 340 transitions, 4226 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-21 20:38:51,927 INFO L231 Difference]: Finished difference. Result has 287 places, 325 transitions, 3687 flow [2024-06-21 20:38:51,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3373, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3687, PETRI_PLACES=287, PETRI_TRANSITIONS=325} [2024-06-21 20:38:51,928 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 256 predicate places. [2024-06-21 20:38:51,928 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 325 transitions, 3687 flow [2024-06-21 20:38:51,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:51,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:51,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:51,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 20:38:51,928 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:38:51,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:51,929 INFO L85 PathProgramCache]: Analyzing trace with hash 935227253, now seen corresponding path program 6 times [2024-06-21 20:38:51,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:51,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674459635] [2024-06-21 20:38:51,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:51,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:51,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:52,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:52,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:52,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674459635] [2024-06-21 20:38:52,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674459635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:52,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:52,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:38:52,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28997692] [2024-06-21 20:38:52,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:52,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:38:52,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:52,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:38:52,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:38:52,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:38:52,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 325 transitions, 3687 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:52,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:52,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:38:52,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:53,452 INFO L124 PetriNetUnfolderBase]: 809/1398 cut-off events. [2024-06-21 20:38:53,452 INFO L125 PetriNetUnfolderBase]: For 113453/113453 co-relation queries the response was YES. [2024-06-21 20:38:53,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9959 conditions, 1398 events. 809/1398 cut-off events. For 113453/113453 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 7220 event pairs, 69 based on Foata normal form. 3/1400 useless extension candidates. Maximal degree in co-relation 9827. Up to 623 conditions per place. [2024-06-21 20:38:53,468 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 210 selfloop transitions, 137 changer transitions 0/349 dead transitions. [2024-06-21 20:38:53,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 349 transitions, 4511 flow [2024-06-21 20:38:53,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:38:53,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:38:53,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 145 transitions. [2024-06-21 20:38:53,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119318181818182 [2024-06-21 20:38:53,469 INFO L175 Difference]: Start difference. First operand has 287 places, 325 transitions, 3687 flow. Second operand 11 states and 145 transitions. [2024-06-21 20:38:53,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 349 transitions, 4511 flow [2024-06-21 20:38:53,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 349 transitions, 4401 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 20:38:53,888 INFO L231 Difference]: Finished difference. Result has 294 places, 328 transitions, 3926 flow [2024-06-21 20:38:53,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3577, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3926, PETRI_PLACES=294, PETRI_TRANSITIONS=328} [2024-06-21 20:38:53,888 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 263 predicate places. [2024-06-21 20:38:53,888 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 328 transitions, 3926 flow [2024-06-21 20:38:53,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:53,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:53,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:53,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 20:38:53,889 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:38:53,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:53,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1029411381, now seen corresponding path program 1 times [2024-06-21 20:38:53,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:53,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638509613] [2024-06-21 20:38:53,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:53,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:53,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:55,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:55,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:55,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638509613] [2024-06-21 20:38:55,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638509613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:55,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:55,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:38:55,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957313757] [2024-06-21 20:38:55,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:55,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:38:55,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:55,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:38:55,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:38:55,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:38:55,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 328 transitions, 3926 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:55,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:55,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:38:55,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:55,618 INFO L124 PetriNetUnfolderBase]: 813/1406 cut-off events. [2024-06-21 20:38:55,618 INFO L125 PetriNetUnfolderBase]: For 112615/112615 co-relation queries the response was YES. [2024-06-21 20:38:55,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10219 conditions, 1406 events. 813/1406 cut-off events. For 112615/112615 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 7259 event pairs, 55 based on Foata normal form. 2/1407 useless extension candidates. Maximal degree in co-relation 10086. Up to 1166 conditions per place. [2024-06-21 20:38:55,633 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 267 selfloop transitions, 77 changer transitions 0/346 dead transitions. [2024-06-21 20:38:55,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 346 transitions, 4670 flow [2024-06-21 20:38:55,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:38:55,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:38:55,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-21 20:38:55,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-06-21 20:38:55,634 INFO L175 Difference]: Start difference. First operand has 294 places, 328 transitions, 3926 flow. Second operand 10 states and 124 transitions. [2024-06-21 20:38:55,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 346 transitions, 4670 flow [2024-06-21 20:38:56,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 346 transitions, 4345 flow, removed 28 selfloop flow, removed 9 redundant places. [2024-06-21 20:38:56,043 INFO L231 Difference]: Finished difference. Result has 295 places, 329 transitions, 3773 flow [2024-06-21 20:38:56,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3601, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3773, PETRI_PLACES=295, PETRI_TRANSITIONS=329} [2024-06-21 20:38:56,043 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 264 predicate places. [2024-06-21 20:38:56,043 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 329 transitions, 3773 flow [2024-06-21 20:38:56,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:56,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:56,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:56,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 20:38:56,044 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:38:56,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:56,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1677570983, now seen corresponding path program 5 times [2024-06-21 20:38:56,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:56,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188943128] [2024-06-21 20:38:56,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:56,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:56,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:57,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:57,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:57,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188943128] [2024-06-21 20:38:57,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188943128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:57,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:57,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:38:57,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358076077] [2024-06-21 20:38:57,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:57,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:38:57,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:57,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:38:57,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:38:57,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:38:57,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 329 transitions, 3773 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:57,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:57,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:38:57,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:57,553 INFO L124 PetriNetUnfolderBase]: 817/1414 cut-off events. [2024-06-21 20:38:57,553 INFO L125 PetriNetUnfolderBase]: For 114853/114853 co-relation queries the response was YES. [2024-06-21 20:38:57,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10086 conditions, 1414 events. 817/1414 cut-off events. For 114853/114853 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 7330 event pairs, 83 based on Foata normal form. 2/1415 useless extension candidates. Maximal degree in co-relation 9952. Up to 1241 conditions per place. [2024-06-21 20:38:57,567 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 290 selfloop transitions, 54 changer transitions 0/346 dead transitions. [2024-06-21 20:38:57,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 346 transitions, 4535 flow [2024-06-21 20:38:57,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:38:57,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:38:57,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 128 transitions. [2024-06-21 20:38:57,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-21 20:38:57,568 INFO L175 Difference]: Start difference. First operand has 295 places, 329 transitions, 3773 flow. Second operand 11 states and 128 transitions. [2024-06-21 20:38:57,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 346 transitions, 4535 flow [2024-06-21 20:38:58,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 346 transitions, 4349 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 20:38:58,115 INFO L231 Difference]: Finished difference. Result has 298 places, 330 transitions, 3729 flow [2024-06-21 20:38:58,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3587, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3729, PETRI_PLACES=298, PETRI_TRANSITIONS=330} [2024-06-21 20:38:58,115 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 267 predicate places. [2024-06-21 20:38:58,115 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 330 transitions, 3729 flow [2024-06-21 20:38:58,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:58,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:58,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:38:58,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 20:38:58,116 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:38:58,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:58,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1036091385, now seen corresponding path program 7 times [2024-06-21 20:38:58,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:58,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144862135] [2024-06-21 20:38:58,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:58,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:58,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:59,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:38:59,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:59,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144862135] [2024-06-21 20:38:59,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144862135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:59,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:59,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:38:59,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553706575] [2024-06-21 20:38:59,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:59,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:38:59,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:59,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:38:59,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:38:59,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:38:59,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 330 transitions, 3729 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:59,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:59,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:38:59,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:59,635 INFO L124 PetriNetUnfolderBase]: 825/1427 cut-off events. [2024-06-21 20:38:59,635 INFO L125 PetriNetUnfolderBase]: For 117089/117089 co-relation queries the response was YES. [2024-06-21 20:38:59,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10228 conditions, 1427 events. 825/1427 cut-off events. For 117089/117089 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 7424 event pairs, 91 based on Foata normal form. 1/1427 useless extension candidates. Maximal degree in co-relation 10093. Up to 1077 conditions per place. [2024-06-21 20:38:59,650 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 251 selfloop transitions, 98 changer transitions 0/351 dead transitions. [2024-06-21 20:38:59,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 351 transitions, 4741 flow [2024-06-21 20:38:59,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:38:59,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:38:59,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 136 transitions. [2024-06-21 20:38:59,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-06-21 20:38:59,651 INFO L175 Difference]: Start difference. First operand has 298 places, 330 transitions, 3729 flow. Second operand 11 states and 136 transitions. [2024-06-21 20:38:59,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 351 transitions, 4741 flow [2024-06-21 20:39:00,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 351 transitions, 4609 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-21 20:39:00,148 INFO L231 Difference]: Finished difference. Result has 301 places, 335 transitions, 3904 flow [2024-06-21 20:39:00,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3597, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3904, PETRI_PLACES=301, PETRI_TRANSITIONS=335} [2024-06-21 20:39:00,148 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 270 predicate places. [2024-06-21 20:39:00,149 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 335 transitions, 3904 flow [2024-06-21 20:39:00,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:00,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:00,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:00,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 20:39:00,149 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:39:00,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:00,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1677575757, now seen corresponding path program 8 times [2024-06-21 20:39:00,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:00,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028331322] [2024-06-21 20:39:00,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:00,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:00,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:01,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:01,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:01,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028331322] [2024-06-21 20:39:01,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028331322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:01,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:01,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:39:01,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240310503] [2024-06-21 20:39:01,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:01,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:39:01,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:01,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:39:01,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:39:01,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:39:01,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 335 transitions, 3904 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:01,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:01,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:39:01,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:01,597 INFO L124 PetriNetUnfolderBase]: 823/1424 cut-off events. [2024-06-21 20:39:01,597 INFO L125 PetriNetUnfolderBase]: For 115683/115683 co-relation queries the response was YES. [2024-06-21 20:39:01,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10259 conditions, 1424 events. 823/1424 cut-off events. For 115683/115683 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 7402 event pairs, 89 based on Foata normal form. 1/1424 useless extension candidates. Maximal degree in co-relation 10122. Up to 1087 conditions per place. [2024-06-21 20:39:01,613 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 257 selfloop transitions, 91 changer transitions 0/350 dead transitions. [2024-06-21 20:39:01,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 350 transitions, 4644 flow [2024-06-21 20:39:01,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:39:01,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:39:01,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-06-21 20:39:01,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3806818181818182 [2024-06-21 20:39:01,614 INFO L175 Difference]: Start difference. First operand has 301 places, 335 transitions, 3904 flow. Second operand 11 states and 134 transitions. [2024-06-21 20:39:01,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 350 transitions, 4644 flow [2024-06-21 20:39:02,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 350 transitions, 4486 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-21 20:39:02,132 INFO L231 Difference]: Finished difference. Result has 307 places, 335 transitions, 3933 flow [2024-06-21 20:39:02,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3746, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3933, PETRI_PLACES=307, PETRI_TRANSITIONS=335} [2024-06-21 20:39:02,133 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 276 predicate places. [2024-06-21 20:39:02,133 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 335 transitions, 3933 flow [2024-06-21 20:39:02,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:02,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:02,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:02,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 20:39:02,134 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:39:02,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:02,134 INFO L85 PathProgramCache]: Analyzing trace with hash 172999467, now seen corresponding path program 2 times [2024-06-21 20:39:02,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:02,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168571340] [2024-06-21 20:39:02,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:02,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:02,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:03,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:03,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:03,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168571340] [2024-06-21 20:39:03,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168571340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:03,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:03,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:39:03,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251319055] [2024-06-21 20:39:03,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:03,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:39:03,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:03,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:39:03,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:39:03,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:39:03,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 335 transitions, 3933 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:03,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:03,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:39:03,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:03,852 INFO L124 PetriNetUnfolderBase]: 839/1452 cut-off events. [2024-06-21 20:39:03,852 INFO L125 PetriNetUnfolderBase]: For 122299/122299 co-relation queries the response was YES. [2024-06-21 20:39:03,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10558 conditions, 1452 events. 839/1452 cut-off events. For 122299/122299 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 7599 event pairs, 65 based on Foata normal form. 2/1453 useless extension candidates. Maximal degree in co-relation 10419. Up to 1223 conditions per place. [2024-06-21 20:39:03,868 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 280 selfloop transitions, 74 changer transitions 0/356 dead transitions. [2024-06-21 20:39:03,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 356 transitions, 4758 flow [2024-06-21 20:39:03,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:39:03,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:39:03,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 121 transitions. [2024-06-21 20:39:03,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.378125 [2024-06-21 20:39:03,869 INFO L175 Difference]: Start difference. First operand has 307 places, 335 transitions, 3933 flow. Second operand 10 states and 121 transitions. [2024-06-21 20:39:03,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 356 transitions, 4758 flow [2024-06-21 20:39:04,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 356 transitions, 4569 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 20:39:04,339 INFO L231 Difference]: Finished difference. Result has 310 places, 341 transitions, 3997 flow [2024-06-21 20:39:04,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3746, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3997, PETRI_PLACES=310, PETRI_TRANSITIONS=341} [2024-06-21 20:39:04,339 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 279 predicate places. [2024-06-21 20:39:04,339 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 341 transitions, 3997 flow [2024-06-21 20:39:04,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:04,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:04,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:04,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 20:39:04,340 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:39:04,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:04,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1746260701, now seen corresponding path program 3 times [2024-06-21 20:39:04,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:04,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153496774] [2024-06-21 20:39:04,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:04,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:04,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:05,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:05,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:05,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153496774] [2024-06-21 20:39:05,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153496774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:05,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:05,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:39:05,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737770833] [2024-06-21 20:39:05,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:05,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:39:05,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:05,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:39:05,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:39:05,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:39:05,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 341 transitions, 3997 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:05,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:05,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:39:05,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:06,028 INFO L124 PetriNetUnfolderBase]: 843/1460 cut-off events. [2024-06-21 20:39:06,028 INFO L125 PetriNetUnfolderBase]: For 124846/124846 co-relation queries the response was YES. [2024-06-21 20:39:06,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10628 conditions, 1460 events. 843/1460 cut-off events. For 124846/124846 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 7646 event pairs, 61 based on Foata normal form. 2/1461 useless extension candidates. Maximal degree in co-relation 10487. Up to 1214 conditions per place. [2024-06-21 20:39:06,045 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 283 selfloop transitions, 75 changer transitions 0/360 dead transitions. [2024-06-21 20:39:06,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 360 transitions, 4801 flow [2024-06-21 20:39:06,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:39:06,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:39:06,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-21 20:39:06,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-06-21 20:39:06,046 INFO L175 Difference]: Start difference. First operand has 310 places, 341 transitions, 3997 flow. Second operand 10 states and 124 transitions. [2024-06-21 20:39:06,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 360 transitions, 4801 flow [2024-06-21 20:39:06,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 360 transitions, 4684 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 20:39:06,557 INFO L231 Difference]: Finished difference. Result has 316 places, 344 transitions, 4097 flow [2024-06-21 20:39:06,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3880, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4097, PETRI_PLACES=316, PETRI_TRANSITIONS=344} [2024-06-21 20:39:06,558 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 285 predicate places. [2024-06-21 20:39:06,558 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 344 transitions, 4097 flow [2024-06-21 20:39:06,558 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) [2024-06-21 20:39:06,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:06,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:06,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 20:39:06,558 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:39:06,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:06,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1746014437, now seen corresponding path program 9 times [2024-06-21 20:39:06,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:06,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919373074] [2024-06-21 20:39:06,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:06,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:06,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:07,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:07,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:07,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919373074] [2024-06-21 20:39:07,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919373074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:07,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:07,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:39:07,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111865446] [2024-06-21 20:39:07,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:07,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:39:07,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:07,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:39:07,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:39:07,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:39:07,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 344 transitions, 4097 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:07,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:07,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:39:07,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:08,167 INFO L124 PetriNetUnfolderBase]: 852/1475 cut-off events. [2024-06-21 20:39:08,168 INFO L125 PetriNetUnfolderBase]: For 132787/132787 co-relation queries the response was YES. [2024-06-21 20:39:08,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10840 conditions, 1475 events. 852/1475 cut-off events. For 132787/132787 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 7737 event pairs, 73 based on Foata normal form. 3/1477 useless extension candidates. Maximal degree in co-relation 10697. Up to 684 conditions per place. [2024-06-21 20:39:08,185 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 233 selfloop transitions, 136 changer transitions 0/371 dead transitions. [2024-06-21 20:39:08,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 371 transitions, 5029 flow [2024-06-21 20:39:08,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:39:08,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:39:08,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 143 transitions. [2024-06-21 20:39:08,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-21 20:39:08,186 INFO L175 Difference]: Start difference. First operand has 316 places, 344 transitions, 4097 flow. Second operand 11 states and 143 transitions. [2024-06-21 20:39:08,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 371 transitions, 5029 flow [2024-06-21 20:39:08,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 371 transitions, 4874 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 20:39:08,801 INFO L231 Difference]: Finished difference. Result has 320 places, 347 transitions, 4299 flow [2024-06-21 20:39:08,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3942, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4299, PETRI_PLACES=320, PETRI_TRANSITIONS=347} [2024-06-21 20:39:08,801 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 289 predicate places. [2024-06-21 20:39:08,802 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 347 transitions, 4299 flow [2024-06-21 20:39:08,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:08,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:08,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:08,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 20:39:08,802 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:39:08,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:08,803 INFO L85 PathProgramCache]: Analyzing trace with hash -63191517, now seen corresponding path program 10 times [2024-06-21 20:39:08,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:08,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400797232] [2024-06-21 20:39:08,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:08,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:08,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:09,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:09,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:09,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400797232] [2024-06-21 20:39:09,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400797232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:09,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:09,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:39:09,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826943981] [2024-06-21 20:39:09,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:09,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:39:09,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:09,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:39:09,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:39:09,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:39:09,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 347 transitions, 4299 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:09,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:09,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:39:09,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:10,212 INFO L124 PetriNetUnfolderBase]: 855/1480 cut-off events. [2024-06-21 20:39:10,212 INFO L125 PetriNetUnfolderBase]: For 126894/126894 co-relation queries the response was YES. [2024-06-21 20:39:10,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11100 conditions, 1480 events. 855/1480 cut-off events. For 126894/126894 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 7800 event pairs, 83 based on Foata normal form. 1/1480 useless extension candidates. Maximal degree in co-relation 10956. Up to 1143 conditions per place. [2024-06-21 20:39:10,230 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 275 selfloop transitions, 91 changer transitions 0/368 dead transitions. [2024-06-21 20:39:10,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 368 transitions, 5188 flow [2024-06-21 20:39:10,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:39:10,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:39:10,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2024-06-21 20:39:10,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3778409090909091 [2024-06-21 20:39:10,231 INFO L175 Difference]: Start difference. First operand has 320 places, 347 transitions, 4299 flow. Second operand 11 states and 133 transitions. [2024-06-21 20:39:10,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 368 transitions, 5188 flow [2024-06-21 20:39:10,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 368 transitions, 4855 flow, removed 33 selfloop flow, removed 9 redundant places. [2024-06-21 20:39:10,779 INFO L231 Difference]: Finished difference. Result has 322 places, 355 transitions, 4276 flow [2024-06-21 20:39:10,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3966, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4276, PETRI_PLACES=322, PETRI_TRANSITIONS=355} [2024-06-21 20:39:10,779 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 291 predicate places. [2024-06-21 20:39:10,779 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 355 transitions, 4276 flow [2024-06-21 20:39:10,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:10,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:10,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:10,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 20:39:10,780 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:39:10,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:10,780 INFO L85 PathProgramCache]: Analyzing trace with hash -56935407, now seen corresponding path program 11 times [2024-06-21 20:39:10,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:10,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522375228] [2024-06-21 20:39:10,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:10,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:10,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:11,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:11,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:11,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522375228] [2024-06-21 20:39:11,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522375228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:11,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:11,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:39:11,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941762628] [2024-06-21 20:39:11,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:11,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:39:11,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:11,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:39:11,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:39:11,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:39:11,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 355 transitions, 4276 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:11,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:11,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:39:11,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:12,237 INFO L124 PetriNetUnfolderBase]: 858/1485 cut-off events. [2024-06-21 20:39:12,237 INFO L125 PetriNetUnfolderBase]: For 128590/128590 co-relation queries the response was YES. [2024-06-21 20:39:12,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10979 conditions, 1485 events. 858/1485 cut-off events. For 128590/128590 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 7814 event pairs, 91 based on Foata normal form. 1/1485 useless extension candidates. Maximal degree in co-relation 10834. Up to 1148 conditions per place. [2024-06-21 20:39:12,253 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 279 selfloop transitions, 92 changer transitions 0/373 dead transitions. [2024-06-21 20:39:12,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 373 transitions, 5153 flow [2024-06-21 20:39:12,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:39:12,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:39:12,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-06-21 20:39:12,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3806818181818182 [2024-06-21 20:39:12,254 INFO L175 Difference]: Start difference. First operand has 322 places, 355 transitions, 4276 flow. Second operand 11 states and 134 transitions. [2024-06-21 20:39:12,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 373 transitions, 5153 flow [2024-06-21 20:39:12,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 373 transitions, 4967 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 20:39:12,822 INFO L231 Difference]: Finished difference. Result has 328 places, 360 transitions, 4380 flow [2024-06-21 20:39:12,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4093, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4380, PETRI_PLACES=328, PETRI_TRANSITIONS=360} [2024-06-21 20:39:12,823 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 297 predicate places. [2024-06-21 20:39:12,823 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 360 transitions, 4380 flow [2024-06-21 20:39:12,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:12,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:12,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:12,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 20:39:12,823 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:39:12,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:12,824 INFO L85 PathProgramCache]: Analyzing trace with hash 173297997, now seen corresponding path program 4 times [2024-06-21 20:39:12,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:12,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009935881] [2024-06-21 20:39:12,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:12,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:12,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:13,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:13,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:13,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009935881] [2024-06-21 20:39:13,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009935881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:13,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:13,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:39:13,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2310110] [2024-06-21 20:39:13,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:13,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:39:13,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:13,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:39:13,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:39:14,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:39:14,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 360 transitions, 4380 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:14,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:14,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:39:14,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:14,409 INFO L124 PetriNetUnfolderBase]: 869/1506 cut-off events. [2024-06-21 20:39:14,409 INFO L125 PetriNetUnfolderBase]: For 145618/145618 co-relation queries the response was YES. [2024-06-21 20:39:14,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11290 conditions, 1506 events. 869/1506 cut-off events. For 145618/145618 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 7968 event pairs, 64 based on Foata normal form. 2/1507 useless extension candidates. Maximal degree in co-relation 11145. Up to 1232 conditions per place. [2024-06-21 20:39:14,425 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 297 selfloop transitions, 79 changer transitions 0/378 dead transitions. [2024-06-21 20:39:14,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 378 transitions, 5398 flow [2024-06-21 20:39:14,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:39:14,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:39:14,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 122 transitions. [2024-06-21 20:39:14,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38125 [2024-06-21 20:39:14,426 INFO L175 Difference]: Start difference. First operand has 328 places, 360 transitions, 4380 flow. Second operand 10 states and 122 transitions. [2024-06-21 20:39:14,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 378 transitions, 5398 flow [2024-06-21 20:39:15,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 378 transitions, 5190 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 20:39:15,015 INFO L231 Difference]: Finished difference. Result has 332 places, 362 transitions, 4368 flow [2024-06-21 20:39:15,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4172, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4368, PETRI_PLACES=332, PETRI_TRANSITIONS=362} [2024-06-21 20:39:15,015 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 301 predicate places. [2024-06-21 20:39:15,016 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 362 transitions, 4368 flow [2024-06-21 20:39:15,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:15,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:15,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:15,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 20:39:15,016 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:39:15,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:15,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1524615661, now seen corresponding path program 5 times [2024-06-21 20:39:15,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:15,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240935524] [2024-06-21 20:39:15,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:15,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:15,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:16,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:16,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:16,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240935524] [2024-06-21 20:39:16,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240935524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:16,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:16,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:39:16,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526941149] [2024-06-21 20:39:16,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:16,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:39:16,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:16,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:39:16,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:39:16,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:39:16,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 362 transitions, 4368 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:16,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:16,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:39:16,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:16,762 INFO L124 PetriNetUnfolderBase]: 866/1501 cut-off events. [2024-06-21 20:39:16,762 INFO L125 PetriNetUnfolderBase]: For 138604/138604 co-relation queries the response was YES. [2024-06-21 20:39:16,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11056 conditions, 1501 events. 866/1501 cut-off events. For 138604/138604 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 7914 event pairs, 55 based on Foata normal form. 2/1502 useless extension candidates. Maximal degree in co-relation 10911. Up to 1255 conditions per place. [2024-06-21 20:39:16,778 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 302 selfloop transitions, 74 changer transitions 0/378 dead transitions. [2024-06-21 20:39:16,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 378 transitions, 5164 flow [2024-06-21 20:39:16,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:39:16,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:39:16,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-06-21 20:39:16,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.390625 [2024-06-21 20:39:16,781 INFO L175 Difference]: Start difference. First operand has 332 places, 362 transitions, 4368 flow. Second operand 10 states and 125 transitions. [2024-06-21 20:39:16,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 378 transitions, 5164 flow [2024-06-21 20:39:17,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 378 transitions, 5046 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 20:39:17,321 INFO L231 Difference]: Finished difference. Result has 336 places, 362 transitions, 4403 flow [2024-06-21 20:39:17,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4250, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4403, PETRI_PLACES=336, PETRI_TRANSITIONS=362} [2024-06-21 20:39:17,322 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 305 predicate places. [2024-06-21 20:39:17,322 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 362 transitions, 4403 flow [2024-06-21 20:39:17,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:17,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:17,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:17,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 20:39:17,323 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:39:17,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:17,323 INFO L85 PathProgramCache]: Analyzing trace with hash -63369147, now seen corresponding path program 12 times [2024-06-21 20:39:17,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:17,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350634082] [2024-06-21 20:39:17,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:17,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:17,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:18,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:18,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:18,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350634082] [2024-06-21 20:39:18,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350634082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:18,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:18,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:39:18,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844503715] [2024-06-21 20:39:18,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:18,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:39:18,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:18,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:39:18,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:39:18,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:39:18,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 362 transitions, 4403 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:18,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:18,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:39:18,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:18,804 INFO L124 PetriNetUnfolderBase]: 874/1514 cut-off events. [2024-06-21 20:39:18,804 INFO L125 PetriNetUnfolderBase]: For 141862/141862 co-relation queries the response was YES. [2024-06-21 20:39:18,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11435 conditions, 1514 events. 874/1514 cut-off events. For 141862/141862 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 8028 event pairs, 95 based on Foata normal form. 1/1514 useless extension candidates. Maximal degree in co-relation 11288. Up to 1161 conditions per place. [2024-06-21 20:39:18,821 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 272 selfloop transitions, 107 changer transitions 0/381 dead transitions. [2024-06-21 20:39:18,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 381 transitions, 5519 flow [2024-06-21 20:39:18,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:39:18,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:39:18,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-06-21 20:39:18,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3806818181818182 [2024-06-21 20:39:18,822 INFO L175 Difference]: Start difference. First operand has 336 places, 362 transitions, 4403 flow. Second operand 11 states and 134 transitions. [2024-06-21 20:39:18,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 381 transitions, 5519 flow [2024-06-21 20:39:19,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 381 transitions, 5314 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 20:39:19,433 INFO L231 Difference]: Finished difference. Result has 338 places, 367 transitions, 4558 flow [2024-06-21 20:39:19,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4198, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4558, PETRI_PLACES=338, PETRI_TRANSITIONS=367} [2024-06-21 20:39:19,434 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 307 predicate places. [2024-06-21 20:39:19,434 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 367 transitions, 4558 flow [2024-06-21 20:39:19,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:19,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:19,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:19,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 20:39:19,435 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:39:19,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:19,435 INFO L85 PathProgramCache]: Analyzing trace with hash -63369271, now seen corresponding path program 6 times [2024-06-21 20:39:19,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:19,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661411555] [2024-06-21 20:39:19,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:19,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:19,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:20,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:20,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:20,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661411555] [2024-06-21 20:39:20,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661411555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:20,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:20,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:39:20,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570037658] [2024-06-21 20:39:20,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:20,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:39:20,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:20,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:39:20,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:39:20,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:39:20,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 367 transitions, 4558 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:20,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:20,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:39:20,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:20,954 INFO L124 PetriNetUnfolderBase]: 878/1522 cut-off events. [2024-06-21 20:39:20,955 INFO L125 PetriNetUnfolderBase]: For 149981/149981 co-relation queries the response was YES. [2024-06-21 20:39:20,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11590 conditions, 1522 events. 878/1522 cut-off events. For 149981/149981 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 8064 event pairs, 96 based on Foata normal form. 2/1523 useless extension candidates. Maximal degree in co-relation 11441. Up to 1349 conditions per place. [2024-06-21 20:39:20,973 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 330 selfloop transitions, 50 changer transitions 0/382 dead transitions. [2024-06-21 20:39:20,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 382 transitions, 5388 flow [2024-06-21 20:39:20,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:39:20,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:39:20,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 126 transitions. [2024-06-21 20:39:20,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35795454545454547 [2024-06-21 20:39:20,974 INFO L175 Difference]: Start difference. First operand has 338 places, 367 transitions, 4558 flow. Second operand 11 states and 126 transitions. [2024-06-21 20:39:20,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 382 transitions, 5388 flow [2024-06-21 20:39:21,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 382 transitions, 5230 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-21 20:39:21,607 INFO L231 Difference]: Finished difference. Result has 344 places, 368 transitions, 4536 flow [2024-06-21 20:39:21,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4400, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4536, PETRI_PLACES=344, PETRI_TRANSITIONS=368} [2024-06-21 20:39:21,607 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 313 predicate places. [2024-06-21 20:39:21,608 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 368 transitions, 4536 flow [2024-06-21 20:39:21,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:21,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:21,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:21,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 20:39:21,608 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:39:21,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:21,609 INFO L85 PathProgramCache]: Analyzing trace with hash -63364497, now seen corresponding path program 13 times [2024-06-21 20:39:21,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:21,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99227407] [2024-06-21 20:39:21,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:21,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:21,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:22,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:22,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:22,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99227407] [2024-06-21 20:39:22,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99227407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:22,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:22,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:39:22,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987645298] [2024-06-21 20:39:22,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:22,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:39:22,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:22,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:39:22,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:39:22,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:39:22,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 368 transitions, 4536 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:22,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:22,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:39:22,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:23,141 INFO L124 PetriNetUnfolderBase]: 876/1519 cut-off events. [2024-06-21 20:39:23,141 INFO L125 PetriNetUnfolderBase]: For 141990/141990 co-relation queries the response was YES. [2024-06-21 20:39:23,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11498 conditions, 1519 events. 876/1519 cut-off events. For 141990/141990 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 8069 event pairs, 97 based on Foata normal form. 1/1519 useless extension candidates. Maximal degree in co-relation 11347. Up to 1182 conditions per place. [2024-06-21 20:39:23,158 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 281 selfloop transitions, 98 changer transitions 0/381 dead transitions. [2024-06-21 20:39:23,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 381 transitions, 5332 flow [2024-06-21 20:39:23,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:39:23,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:39:23,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 132 transitions. [2024-06-21 20:39:23,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 20:39:23,159 INFO L175 Difference]: Start difference. First operand has 344 places, 368 transitions, 4536 flow. Second operand 11 states and 132 transitions. [2024-06-21 20:39:23,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 381 transitions, 5332 flow [2024-06-21 20:39:23,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 381 transitions, 5176 flow, removed 29 selfloop flow, removed 9 redundant places. [2024-06-21 20:39:23,797 INFO L231 Difference]: Finished difference. Result has 346 places, 368 transitions, 4581 flow [2024-06-21 20:39:23,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4380, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4581, PETRI_PLACES=346, PETRI_TRANSITIONS=368} [2024-06-21 20:39:23,798 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 315 predicate places. [2024-06-21 20:39:23,798 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 368 transitions, 4581 flow [2024-06-21 20:39:23,798 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) [2024-06-21 20:39:23,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:23,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:23,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 20:39:23,798 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:39:23,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:23,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1098887769, now seen corresponding path program 6 times [2024-06-21 20:39:23,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:23,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837265208] [2024-06-21 20:39:23,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:23,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:23,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:24,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:24,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:24,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837265208] [2024-06-21 20:39:24,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837265208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:24,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:24,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:39:24,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357883328] [2024-06-21 20:39:24,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:24,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:39:24,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:24,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:39:24,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:39:25,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:39:25,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 368 transitions, 4581 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:25,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:25,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:39:25,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:25,576 INFO L124 PetriNetUnfolderBase]: 880/1527 cut-off events. [2024-06-21 20:39:25,576 INFO L125 PetriNetUnfolderBase]: For 149787/149787 co-relation queries the response was YES. [2024-06-21 20:39:25,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11597 conditions, 1527 events. 880/1527 cut-off events. For 149787/149787 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 8134 event pairs, 152 based on Foata normal form. 2/1528 useless extension candidates. Maximal degree in co-relation 11445. Up to 1476 conditions per place. [2024-06-21 20:39:25,594 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 358 selfloop transitions, 21 changer transitions 0/381 dead transitions. [2024-06-21 20:39:25,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 381 transitions, 5387 flow [2024-06-21 20:39:25,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:39:25,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:39:25,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 109 transitions. [2024-06-21 20:39:25,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.340625 [2024-06-21 20:39:25,595 INFO L175 Difference]: Start difference. First operand has 346 places, 368 transitions, 4581 flow. Second operand 10 states and 109 transitions. [2024-06-21 20:39:25,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 381 transitions, 5387 flow [2024-06-21 20:39:26,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 381 transitions, 5182 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 20:39:26,224 INFO L231 Difference]: Finished difference. Result has 348 places, 369 transitions, 4443 flow [2024-06-21 20:39:26,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4376, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4443, PETRI_PLACES=348, PETRI_TRANSITIONS=369} [2024-06-21 20:39:26,225 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 317 predicate places. [2024-06-21 20:39:26,225 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 369 transitions, 4443 flow [2024-06-21 20:39:26,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:26,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:26,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:26,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 20:39:26,225 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:39:26,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:26,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1391056355, now seen corresponding path program 7 times [2024-06-21 20:39:26,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:26,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650390507] [2024-06-21 20:39:26,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:26,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:26,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:27,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:27,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:27,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650390507] [2024-06-21 20:39:27,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650390507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:27,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:27,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:39:27,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038674624] [2024-06-21 20:39:27,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:27,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:39:27,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:27,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:39:27,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:39:27,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:39:27,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 369 transitions, 4443 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:27,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:27,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:39:27,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:28,215 INFO L124 PetriNetUnfolderBase]: 890/1545 cut-off events. [2024-06-21 20:39:28,215 INFO L125 PetriNetUnfolderBase]: For 152357/152357 co-relation queries the response was YES. [2024-06-21 20:39:28,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11567 conditions, 1545 events. 890/1545 cut-off events. For 152357/152357 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 8271 event pairs, 142 based on Foata normal form. 2/1546 useless extension candidates. Maximal degree in co-relation 11414. Up to 1459 conditions per place. [2024-06-21 20:39:28,233 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 356 selfloop transitions, 28 changer transitions 0/386 dead transitions. [2024-06-21 20:39:28,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 386 transitions, 5304 flow [2024-06-21 20:39:28,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:39:28,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:39:28,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-21 20:39:28,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.359375 [2024-06-21 20:39:28,234 INFO L175 Difference]: Start difference. First operand has 348 places, 369 transitions, 4443 flow. Second operand 10 states and 115 transitions. [2024-06-21 20:39:28,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 386 transitions, 5304 flow [2024-06-21 20:39:28,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 386 transitions, 5249 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-21 20:39:28,874 INFO L231 Difference]: Finished difference. Result has 351 places, 373 transitions, 4517 flow [2024-06-21 20:39:28,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4388, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4517, PETRI_PLACES=351, PETRI_TRANSITIONS=373} [2024-06-21 20:39:28,874 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 320 predicate places. [2024-06-21 20:39:28,874 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 373 transitions, 4517 flow [2024-06-21 20:39:28,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:28,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:28,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:28,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 20:39:28,875 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:39:28,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:28,875 INFO L85 PathProgramCache]: Analyzing trace with hash 485546347, now seen corresponding path program 14 times [2024-06-21 20:39:28,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:28,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671970730] [2024-06-21 20:39:28,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:28,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:28,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:30,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:30,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:30,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671970730] [2024-06-21 20:39:30,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671970730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:30,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:30,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:39:30,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297398254] [2024-06-21 20:39:30,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:30,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:39:30,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:30,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:39:30,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:39:30,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:39:30,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 373 transitions, 4517 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:30,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:30,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:39:30,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:30,641 INFO L124 PetriNetUnfolderBase]: 893/1550 cut-off events. [2024-06-21 20:39:30,642 INFO L125 PetriNetUnfolderBase]: For 150051/150051 co-relation queries the response was YES. [2024-06-21 20:39:30,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11679 conditions, 1550 events. 893/1550 cut-off events. For 150051/150051 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 8303 event pairs, 150 based on Foata normal form. 1/1550 useless extension candidates. Maximal degree in co-relation 11524. Up to 1518 conditions per place. [2024-06-21 20:39:30,661 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 366 selfloop transitions, 18 changer transitions 0/386 dead transitions. [2024-06-21 20:39:30,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 386 transitions, 5394 flow [2024-06-21 20:39:30,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:39:30,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:39:30,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 107 transitions. [2024-06-21 20:39:30,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.334375 [2024-06-21 20:39:30,662 INFO L175 Difference]: Start difference. First operand has 351 places, 373 transitions, 4517 flow. Second operand 10 states and 107 transitions. [2024-06-21 20:39:30,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 386 transitions, 5394 flow [2024-06-21 20:39:31,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 386 transitions, 5333 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 20:39:31,318 INFO L231 Difference]: Finished difference. Result has 357 places, 377 transitions, 4598 flow [2024-06-21 20:39:31,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4456, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4598, PETRI_PLACES=357, PETRI_TRANSITIONS=377} [2024-06-21 20:39:31,319 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 326 predicate places. [2024-06-21 20:39:31,319 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 377 transitions, 4598 flow [2024-06-21 20:39:31,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:31,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:31,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:31,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 20:39:31,319 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:39:31,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:31,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1382724485, now seen corresponding path program 8 times [2024-06-21 20:39:31,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:31,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854838766] [2024-06-21 20:39:31,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:31,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:31,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:32,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:32,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:32,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854838766] [2024-06-21 20:39:32,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854838766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:32,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:32,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:39:32,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097363600] [2024-06-21 20:39:32,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:32,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:39:32,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:32,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:39:32,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:39:32,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:39:32,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 377 transitions, 4598 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:32,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:32,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:39:32,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:33,005 INFO L124 PetriNetUnfolderBase]: 897/1558 cut-off events. [2024-06-21 20:39:33,005 INFO L125 PetriNetUnfolderBase]: For 158507/158507 co-relation queries the response was YES. [2024-06-21 20:39:33,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11745 conditions, 1558 events. 897/1558 cut-off events. For 158507/158507 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 8358 event pairs, 148 based on Foata normal form. 2/1559 useless extension candidates. Maximal degree in co-relation 11588. Up to 1472 conditions per place. [2024-06-21 20:39:33,024 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 363 selfloop transitions, 28 changer transitions 0/393 dead transitions. [2024-06-21 20:39:33,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 393 transitions, 5457 flow [2024-06-21 20:39:33,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:39:33,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:39:33,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2024-06-21 20:39:33,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.365625 [2024-06-21 20:39:33,025 INFO L175 Difference]: Start difference. First operand has 357 places, 377 transitions, 4598 flow. Second operand 10 states and 117 transitions. [2024-06-21 20:39:33,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 393 transitions, 5457 flow [2024-06-21 20:39:33,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 393 transitions, 5372 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-21 20:39:33,718 INFO L231 Difference]: Finished difference. Result has 361 places, 379 transitions, 4622 flow [2024-06-21 20:39:33,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4514, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4622, PETRI_PLACES=361, PETRI_TRANSITIONS=379} [2024-06-21 20:39:33,718 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 330 predicate places. [2024-06-21 20:39:33,718 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 379 transitions, 4622 flow [2024-06-21 20:39:33,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:33,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:33,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:33,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 20:39:33,719 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:39:33,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:33,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1161079445, now seen corresponding path program 9 times [2024-06-21 20:39:33,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:33,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593529726] [2024-06-21 20:39:33,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:33,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:33,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:34,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:34,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:34,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593529726] [2024-06-21 20:39:34,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593529726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:34,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:34,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:39:34,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864055544] [2024-06-21 20:39:34,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:34,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:39:34,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:34,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:39:34,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:39:34,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:39:34,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 379 transitions, 4622 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:34,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:34,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:39:34,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:35,455 INFO L124 PetriNetUnfolderBase]: 901/1566 cut-off events. [2024-06-21 20:39:35,455 INFO L125 PetriNetUnfolderBase]: For 161459/161459 co-relation queries the response was YES. [2024-06-21 20:39:35,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11830 conditions, 1566 events. 901/1566 cut-off events. For 161459/161459 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 8451 event pairs, 144 based on Foata normal form. 2/1567 useless extension candidates. Maximal degree in co-relation 11672. Up to 1480 conditions per place. [2024-06-21 20:39:35,469 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 361 selfloop transitions, 30 changer transitions 0/393 dead transitions. [2024-06-21 20:39:35,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 393 transitions, 5462 flow [2024-06-21 20:39:35,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:39:35,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:39:35,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2024-06-21 20:39:35,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35625 [2024-06-21 20:39:35,472 INFO L175 Difference]: Start difference. First operand has 361 places, 379 transitions, 4622 flow. Second operand 10 states and 114 transitions. [2024-06-21 20:39:35,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 393 transitions, 5462 flow [2024-06-21 20:39:36,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 393 transitions, 5390 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 20:39:36,129 INFO L231 Difference]: Finished difference. Result has 364 places, 380 transitions, 4640 flow [2024-06-21 20:39:36,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4550, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4640, PETRI_PLACES=364, PETRI_TRANSITIONS=380} [2024-06-21 20:39:36,129 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 333 predicate places. [2024-06-21 20:39:36,129 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 380 transitions, 4640 flow [2024-06-21 20:39:36,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:36,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:36,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:36,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 20:39:36,130 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:39:36,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:36,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1489226551, now seen corresponding path program 15 times [2024-06-21 20:39:36,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:36,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370373492] [2024-06-21 20:39:36,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:36,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:36,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:36,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:36,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:36,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370373492] [2024-06-21 20:39:36,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370373492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:36,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:36,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:39:36,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123845896] [2024-06-21 20:39:36,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:36,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:39:36,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:36,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:39:36,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:39:37,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:39:37,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 380 transitions, 4640 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:37,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:37,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:39:37,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:37,516 INFO L124 PetriNetUnfolderBase]: 904/1571 cut-off events. [2024-06-21 20:39:37,516 INFO L125 PetriNetUnfolderBase]: For 158644/158644 co-relation queries the response was YES. [2024-06-21 20:39:37,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11909 conditions, 1571 events. 904/1571 cut-off events. For 158644/158644 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 8478 event pairs, 158 based on Foata normal form. 1/1571 useless extension candidates. Maximal degree in co-relation 11750. Up to 1497 conditions per place. [2024-06-21 20:39:37,535 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 358 selfloop transitions, 34 changer transitions 0/394 dead transitions. [2024-06-21 20:39:37,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 394 transitions, 5543 flow [2024-06-21 20:39:37,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:39:37,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:39:37,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-21 20:39:37,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3494318181818182 [2024-06-21 20:39:37,536 INFO L175 Difference]: Start difference. First operand has 364 places, 380 transitions, 4640 flow. Second operand 11 states and 123 transitions. [2024-06-21 20:39:37,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 394 transitions, 5543 flow [2024-06-21 20:39:38,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 394 transitions, 5448 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-21 20:39:38,255 INFO L231 Difference]: Finished difference. Result has 366 places, 384 transitions, 4719 flow [2024-06-21 20:39:38,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4545, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4719, PETRI_PLACES=366, PETRI_TRANSITIONS=384} [2024-06-21 20:39:38,255 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 335 predicate places. [2024-06-21 20:39:38,255 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 384 transitions, 4719 flow [2024-06-21 20:39:38,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:38,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:38,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:38,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 20:39:38,256 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:39:38,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:38,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1267581511, now seen corresponding path program 16 times [2024-06-21 20:39:38,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:38,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846263470] [2024-06-21 20:39:38,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:38,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:38,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:39,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:39,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:39,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846263470] [2024-06-21 20:39:39,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846263470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:39,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:39,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:39:39,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481293008] [2024-06-21 20:39:39,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:39,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:39:39,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:39,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:39:39,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:39:39,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:39:39,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 384 transitions, 4719 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:39,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:39,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:39:39,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:39,642 INFO L124 PetriNetUnfolderBase]: 907/1576 cut-off events. [2024-06-21 20:39:39,642 INFO L125 PetriNetUnfolderBase]: For 161657/161657 co-relation queries the response was YES. [2024-06-21 20:39:39,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11981 conditions, 1576 events. 907/1576 cut-off events. For 161657/161657 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 8495 event pairs, 156 based on Foata normal form. 1/1576 useless extension candidates. Maximal degree in co-relation 11822. Up to 1502 conditions per place. [2024-06-21 20:39:39,661 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 359 selfloop transitions, 37 changer transitions 0/398 dead transitions. [2024-06-21 20:39:39,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 398 transitions, 5638 flow [2024-06-21 20:39:39,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:39:39,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:39:39,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2024-06-21 20:39:39,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3465909090909091 [2024-06-21 20:39:39,661 INFO L175 Difference]: Start difference. First operand has 366 places, 384 transitions, 4719 flow. Second operand 11 states and 122 transitions. [2024-06-21 20:39:39,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 398 transitions, 5638 flow [2024-06-21 20:39:40,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 398 transitions, 5439 flow, removed 38 selfloop flow, removed 9 redundant places. [2024-06-21 20:39:40,375 INFO L231 Difference]: Finished difference. Result has 368 places, 388 transitions, 4708 flow [2024-06-21 20:39:40,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4528, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4708, PETRI_PLACES=368, PETRI_TRANSITIONS=388} [2024-06-21 20:39:40,376 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 337 predicate places. [2024-06-21 20:39:40,376 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 388 transitions, 4708 flow [2024-06-21 20:39:40,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:40,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:40,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:40,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 20:39:40,376 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:39:40,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:40,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1391066585, now seen corresponding path program 10 times [2024-06-21 20:39:40,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:40,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231391384] [2024-06-21 20:39:40,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:40,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:40,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:41,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:41,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:41,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231391384] [2024-06-21 20:39:41,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231391384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:41,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:41,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:39:41,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946969271] [2024-06-21 20:39:41,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:41,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:39:41,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:41,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:39:41,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:39:41,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:39:41,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 388 transitions, 4708 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:41,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:41,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:39:41,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:42,227 INFO L124 PetriNetUnfolderBase]: 911/1584 cut-off events. [2024-06-21 20:39:42,227 INFO L125 PetriNetUnfolderBase]: For 170127/170127 co-relation queries the response was YES. [2024-06-21 20:39:42,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11998 conditions, 1584 events. 911/1584 cut-off events. For 170127/170127 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 8584 event pairs, 150 based on Foata normal form. 2/1585 useless extension candidates. Maximal degree in co-relation 11839. Up to 1472 conditions per place. [2024-06-21 20:39:42,246 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 368 selfloop transitions, 32 changer transitions 0/402 dead transitions. [2024-06-21 20:39:42,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 402 transitions, 5566 flow [2024-06-21 20:39:42,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:39:42,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:39:42,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-21 20:39:42,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.359375 [2024-06-21 20:39:42,247 INFO L175 Difference]: Start difference. First operand has 368 places, 388 transitions, 4708 flow. Second operand 10 states and 115 transitions. [2024-06-21 20:39:42,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 402 transitions, 5566 flow [2024-06-21 20:39:42,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 402 transitions, 5389 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-21 20:39:42,920 INFO L231 Difference]: Finished difference. Result has 371 places, 389 transitions, 4627 flow [2024-06-21 20:39:42,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4531, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4627, PETRI_PLACES=371, PETRI_TRANSITIONS=389} [2024-06-21 20:39:42,921 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 340 predicate places. [2024-06-21 20:39:42,921 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 389 transitions, 4627 flow [2024-06-21 20:39:42,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:42,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:42,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:42,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 20:39:42,921 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:39:42,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:42,922 INFO L85 PathProgramCache]: Analyzing trace with hash -892722687, now seen corresponding path program 17 times [2024-06-21 20:39:42,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:42,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331752196] [2024-06-21 20:39:42,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:42,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:42,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:43,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:43,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:43,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331752196] [2024-06-21 20:39:43,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331752196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:43,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:43,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:39:43,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737490063] [2024-06-21 20:39:43,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:43,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:39:43,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:43,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:39:43,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:39:43,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:39:43,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 389 transitions, 4627 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:43,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:43,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:39:43,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:44,387 INFO L124 PetriNetUnfolderBase]: 914/1589 cut-off events. [2024-06-21 20:39:44,387 INFO L125 PetriNetUnfolderBase]: For 167242/167242 co-relation queries the response was YES. [2024-06-21 20:39:44,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12041 conditions, 1589 events. 914/1589 cut-off events. For 167242/167242 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 8600 event pairs, 154 based on Foata normal form. 1/1589 useless extension candidates. Maximal degree in co-relation 11881. Up to 1515 conditions per place. [2024-06-21 20:39:44,404 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 360 selfloop transitions, 40 changer transitions 0/402 dead transitions. [2024-06-21 20:39:44,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 402 transitions, 5533 flow [2024-06-21 20:39:44,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:39:44,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:39:44,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 121 transitions. [2024-06-21 20:39:44,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34375 [2024-06-21 20:39:44,406 INFO L175 Difference]: Start difference. First operand has 371 places, 389 transitions, 4627 flow. Second operand 11 states and 121 transitions. [2024-06-21 20:39:44,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 402 transitions, 5533 flow [2024-06-21 20:39:45,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 402 transitions, 5447 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-21 20:39:45,165 INFO L231 Difference]: Finished difference. Result has 374 places, 392 transitions, 4714 flow [2024-06-21 20:39:45,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4541, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4714, PETRI_PLACES=374, PETRI_TRANSITIONS=392} [2024-06-21 20:39:45,165 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 343 predicate places. [2024-06-21 20:39:45,165 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 392 transitions, 4714 flow [2024-06-21 20:39:45,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:45,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:45,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:45,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 20:39:45,166 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:39:45,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:45,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1261147771, now seen corresponding path program 18 times [2024-06-21 20:39:45,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:45,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63332816] [2024-06-21 20:39:45,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:45,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:45,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:46,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:46,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:46,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63332816] [2024-06-21 20:39:46,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63332816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:46,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:46,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:39:46,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038690733] [2024-06-21 20:39:46,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:46,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:39:46,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:46,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:39:46,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:39:46,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:39:46,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 392 transitions, 4714 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:46,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:46,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:39:46,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:46,712 INFO L124 PetriNetUnfolderBase]: 917/1594 cut-off events. [2024-06-21 20:39:46,712 INFO L125 PetriNetUnfolderBase]: For 170427/170427 co-relation queries the response was YES. [2024-06-21 20:39:46,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12134 conditions, 1594 events. 917/1594 cut-off events. For 170427/170427 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 8644 event pairs, 156 based on Foata normal form. 1/1594 useless extension candidates. Maximal degree in co-relation 11973. Up to 1501 conditions per place. [2024-06-21 20:39:46,729 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 351 selfloop transitions, 54 changer transitions 0/407 dead transitions. [2024-06-21 20:39:46,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 407 transitions, 5926 flow [2024-06-21 20:39:46,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:39:46,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:39:46,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2024-06-21 20:39:46,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3465909090909091 [2024-06-21 20:39:46,730 INFO L175 Difference]: Start difference. First operand has 374 places, 392 transitions, 4714 flow. Second operand 11 states and 122 transitions. [2024-06-21 20:39:46,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 407 transitions, 5926 flow [2024-06-21 20:39:47,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 407 transitions, 5723 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-06-21 20:39:47,384 INFO L231 Difference]: Finished difference. Result has 377 places, 396 transitions, 4784 flow [2024-06-21 20:39:47,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4511, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4784, PETRI_PLACES=377, PETRI_TRANSITIONS=396} [2024-06-21 20:39:47,384 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 346 predicate places. [2024-06-21 20:39:47,385 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 396 transitions, 4784 flow [2024-06-21 20:39:47,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:47,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:47,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:47,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 20:39:47,385 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:39:47,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:47,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1196581971, now seen corresponding path program 7 times [2024-06-21 20:39:47,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:47,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953983128] [2024-06-21 20:39:47,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:47,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:48,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:48,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:48,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953983128] [2024-06-21 20:39:48,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953983128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:48,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:48,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:39:48,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080508443] [2024-06-21 20:39:48,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:48,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:39:48,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:48,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:39:48,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:39:48,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:39:48,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 396 transitions, 4784 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:48,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:48,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:39:48,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:48,870 INFO L124 PetriNetUnfolderBase]: 914/1589 cut-off events. [2024-06-21 20:39:48,870 INFO L125 PetriNetUnfolderBase]: For 166823/166823 co-relation queries the response was YES. [2024-06-21 20:39:48,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11844 conditions, 1589 events. 914/1589 cut-off events. For 166823/166823 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 8613 event pairs, 149 based on Foata normal form. 2/1590 useless extension candidates. Maximal degree in co-relation 11682. Up to 1554 conditions per place. [2024-06-21 20:39:48,886 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 387 selfloop transitions, 18 changer transitions 0/407 dead transitions. [2024-06-21 20:39:48,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 407 transitions, 5618 flow [2024-06-21 20:39:48,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:39:48,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:39:48,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 115 transitions. [2024-06-21 20:39:48,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32670454545454547 [2024-06-21 20:39:48,887 INFO L175 Difference]: Start difference. First operand has 377 places, 396 transitions, 4784 flow. Second operand 11 states and 115 transitions. [2024-06-21 20:39:48,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 407 transitions, 5618 flow [2024-06-21 20:39:49,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 407 transitions, 5491 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-21 20:39:49,617 INFO L231 Difference]: Finished difference. Result has 383 places, 396 transitions, 4697 flow [2024-06-21 20:39:49,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4657, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4697, PETRI_PLACES=383, PETRI_TRANSITIONS=396} [2024-06-21 20:39:49,617 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 352 predicate places. [2024-06-21 20:39:49,617 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 396 transitions, 4697 flow [2024-06-21 20:39:49,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:49,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:49,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:49,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 20:39:49,618 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:39:49,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:49,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1154404091, now seen corresponding path program 19 times [2024-06-21 20:39:49,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:49,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565167808] [2024-06-21 20:39:49,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:49,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:49,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:50,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:50,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:50,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565167808] [2024-06-21 20:39:50,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565167808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:50,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:50,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:39:50,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721797426] [2024-06-21 20:39:50,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:50,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:39:50,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:50,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:39:50,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:39:50,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:39:50,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 396 transitions, 4697 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:50,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:50,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:39:50,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:51,119 INFO L124 PetriNetUnfolderBase]: 918/1596 cut-off events. [2024-06-21 20:39:51,119 INFO L125 PetriNetUnfolderBase]: For 169833/169833 co-relation queries the response was YES. [2024-06-21 20:39:51,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11775 conditions, 1596 events. 918/1596 cut-off events. For 169833/169833 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 8664 event pairs, 139 based on Foata normal form. 3/1598 useless extension candidates. Maximal degree in co-relation 11611. Up to 1386 conditions per place. [2024-06-21 20:39:51,139 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 351 selfloop transitions, 61 changer transitions 0/414 dead transitions. [2024-06-21 20:39:51,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 414 transitions, 5641 flow [2024-06-21 20:39:51,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:39:51,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:39:51,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 132 transitions. [2024-06-21 20:39:51,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 20:39:51,140 INFO L175 Difference]: Start difference. First operand has 383 places, 396 transitions, 4697 flow. Second operand 11 states and 132 transitions. [2024-06-21 20:39:51,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 414 transitions, 5641 flow [2024-06-21 20:39:51,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 414 transitions, 5473 flow, removed 36 selfloop flow, removed 11 redundant places. [2024-06-21 20:39:51,865 INFO L231 Difference]: Finished difference. Result has 383 places, 398 transitions, 4737 flow [2024-06-21 20:39:51,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4529, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4737, PETRI_PLACES=383, PETRI_TRANSITIONS=398} [2024-06-21 20:39:51,865 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 352 predicate places. [2024-06-21 20:39:51,866 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 398 transitions, 4737 flow [2024-06-21 20:39:51,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:51,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:51,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:51,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 20:39:51,866 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:39:51,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:51,866 INFO L85 PathProgramCache]: Analyzing trace with hash -722105039, now seen corresponding path program 11 times [2024-06-21 20:39:51,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:51,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732328882] [2024-06-21 20:39:51,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:51,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:51,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:53,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:53,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:53,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732328882] [2024-06-21 20:39:53,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732328882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:53,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:53,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:39:53,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185652067] [2024-06-21 20:39:53,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:53,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:39:53,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:53,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:39:53,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:39:53,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:39:53,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 398 transitions, 4737 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:53,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:53,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:39:53,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:53,671 INFO L124 PetriNetUnfolderBase]: 922/1604 cut-off events. [2024-06-21 20:39:53,671 INFO L125 PetriNetUnfolderBase]: For 165907/165907 co-relation queries the response was YES. [2024-06-21 20:39:53,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11853 conditions, 1604 events. 922/1604 cut-off events. For 165907/165907 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 8726 event pairs, 149 based on Foata normal form. 2/1605 useless extension candidates. Maximal degree in co-relation 11689. Up to 1529 conditions per place. [2024-06-21 20:39:53,692 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 387 selfloop transitions, 22 changer transitions 0/411 dead transitions. [2024-06-21 20:39:53,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 411 transitions, 5611 flow [2024-06-21 20:39:53,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:39:53,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:39:53,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-21 20:39:53,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34375 [2024-06-21 20:39:53,693 INFO L175 Difference]: Start difference. First operand has 383 places, 398 transitions, 4737 flow. Second operand 10 states and 110 transitions. [2024-06-21 20:39:53,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 411 transitions, 5611 flow [2024-06-21 20:39:54,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 411 transitions, 5322 flow, removed 47 selfloop flow, removed 12 redundant places. [2024-06-21 20:39:54,398 INFO L231 Difference]: Finished difference. Result has 381 places, 399 transitions, 4527 flow [2024-06-21 20:39:54,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4450, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4527, PETRI_PLACES=381, PETRI_TRANSITIONS=399} [2024-06-21 20:39:54,399 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 350 predicate places. [2024-06-21 20:39:54,399 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 399 transitions, 4527 flow [2024-06-21 20:39:54,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:54,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:54,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:54,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 20:39:54,399 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:39:54,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:54,400 INFO L85 PathProgramCache]: Analyzing trace with hash -722412497, now seen corresponding path program 1 times [2024-06-21 20:39:54,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:54,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922036854] [2024-06-21 20:39:54,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:54,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:54,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:55,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:55,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:55,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922036854] [2024-06-21 20:39:55,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922036854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:55,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:55,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:39:55,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930402290] [2024-06-21 20:39:55,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:55,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:39:55,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:55,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:39:55,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:39:55,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:39:55,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 399 transitions, 4527 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:55,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:55,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:39:55,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:55,993 INFO L124 PetriNetUnfolderBase]: 919/1600 cut-off events. [2024-06-21 20:39:55,993 INFO L125 PetriNetUnfolderBase]: For 154581/154581 co-relation queries the response was YES. [2024-06-21 20:39:56,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11206 conditions, 1600 events. 919/1600 cut-off events. For 154581/154581 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 8705 event pairs, 146 based on Foata normal form. 2/1601 useless extension candidates. Maximal degree in co-relation 11044. Up to 1534 conditions per place. [2024-06-21 20:39:56,013 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 390 selfloop transitions, 26 changer transitions 0/418 dead transitions. [2024-06-21 20:39:56,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 418 transitions, 5705 flow [2024-06-21 20:39:56,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:39:56,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:39:56,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 121 transitions. [2024-06-21 20:39:56,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34375 [2024-06-21 20:39:56,014 INFO L175 Difference]: Start difference. First operand has 381 places, 399 transitions, 4527 flow. Second operand 11 states and 121 transitions. [2024-06-21 20:39:56,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 418 transitions, 5705 flow [2024-06-21 20:39:56,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 418 transitions, 5640 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-21 20:39:56,610 INFO L231 Difference]: Finished difference. Result has 385 places, 403 transitions, 4608 flow [2024-06-21 20:39:56,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4462, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4608, PETRI_PLACES=385, PETRI_TRANSITIONS=403} [2024-06-21 20:39:56,610 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 354 predicate places. [2024-06-21 20:39:56,610 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 403 transitions, 4608 flow [2024-06-21 20:39:56,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:56,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:56,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:56,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 20:39:56,611 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:39:56,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:56,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1983139289, now seen corresponding path program 12 times [2024-06-21 20:39:56,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:56,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781209621] [2024-06-21 20:39:56,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:56,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:56,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:57,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:57,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:57,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781209621] [2024-06-21 20:39:57,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781209621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:57,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:57,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:39:57,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685079736] [2024-06-21 20:39:57,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:57,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:39:57,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:57,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:39:57,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:39:57,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:39:57,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 403 transitions, 4608 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:57,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:57,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:39:57,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:39:58,159 INFO L124 PetriNetUnfolderBase]: 923/1608 cut-off events. [2024-06-21 20:39:58,159 INFO L125 PetriNetUnfolderBase]: For 157494/157494 co-relation queries the response was YES. [2024-06-21 20:39:58,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11308 conditions, 1608 events. 923/1608 cut-off events. For 157494/157494 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 8749 event pairs, 148 based on Foata normal form. 2/1609 useless extension candidates. Maximal degree in co-relation 11144. Up to 1563 conditions per place. [2024-06-21 20:39:58,179 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 399 selfloop transitions, 15 changer transitions 0/416 dead transitions. [2024-06-21 20:39:58,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 416 transitions, 5490 flow [2024-06-21 20:39:58,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:39:58,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:39:58,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 106 transitions. [2024-06-21 20:39:58,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33125 [2024-06-21 20:39:58,180 INFO L175 Difference]: Start difference. First operand has 385 places, 403 transitions, 4608 flow. Second operand 10 states and 106 transitions. [2024-06-21 20:39:58,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 416 transitions, 5490 flow [2024-06-21 20:39:58,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 416 transitions, 5418 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-21 20:39:58,736 INFO L231 Difference]: Finished difference. Result has 388 places, 404 transitions, 4600 flow [2024-06-21 20:39:58,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4536, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4600, PETRI_PLACES=388, PETRI_TRANSITIONS=404} [2024-06-21 20:39:58,736 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 357 predicate places. [2024-06-21 20:39:58,736 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 404 transitions, 4600 flow [2024-06-21 20:39:58,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:58,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:39:58,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:39:58,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 20:39:58,737 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:39:58,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:39:58,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1638696739, now seen corresponding path program 1 times [2024-06-21 20:39:58,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:39:58,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332243612] [2024-06-21 20:39:58,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:39:58,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:39:58,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:39:59,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:39:59,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:39:59,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332243612] [2024-06-21 20:39:59,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332243612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:39:59,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:39:59,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:39:59,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299056513] [2024-06-21 20:39:59,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:39:59,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:39:59,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:39:59,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:39:59,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:39:59,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:39:59,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 404 transitions, 4600 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:39:59,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:39:59,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:39:59,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:00,283 INFO L124 PetriNetUnfolderBase]: 920/1603 cut-off events. [2024-06-21 20:40:00,284 INFO L125 PetriNetUnfolderBase]: For 146208/146208 co-relation queries the response was YES. [2024-06-21 20:40:00,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11137 conditions, 1603 events. 920/1603 cut-off events. For 146208/146208 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 8739 event pairs, 146 based on Foata normal form. 1/1603 useless extension candidates. Maximal degree in co-relation 10971. Up to 1549 conditions per place. [2024-06-21 20:40:00,305 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 390 selfloop transitions, 24 changer transitions 0/416 dead transitions. [2024-06-21 20:40:00,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 416 transitions, 5460 flow [2024-06-21 20:40:00,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:40:00,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:40:00,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-21 20:40:00,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34375 [2024-06-21 20:40:00,306 INFO L175 Difference]: Start difference. First operand has 388 places, 404 transitions, 4600 flow. Second operand 10 states and 110 transitions. [2024-06-21 20:40:00,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 416 transitions, 5460 flow [2024-06-21 20:40:00,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 416 transitions, 5386 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-21 20:40:00,907 INFO L231 Difference]: Finished difference. Result has 390 places, 404 transitions, 4582 flow [2024-06-21 20:40:00,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4526, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4582, PETRI_PLACES=390, PETRI_TRANSITIONS=404} [2024-06-21 20:40:00,908 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 359 predicate places. [2024-06-21 20:40:00,908 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 404 transitions, 4582 flow [2024-06-21 20:40:00,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:00,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:00,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:00,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 20:40:00,908 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:40:00,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:00,909 INFO L85 PathProgramCache]: Analyzing trace with hash 522660663, now seen corresponding path program 13 times [2024-06-21 20:40:00,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:00,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422748999] [2024-06-21 20:40:00,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:00,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:00,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:01,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:01,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:01,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422748999] [2024-06-21 20:40:01,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422748999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:01,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:01,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:40:01,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829467261] [2024-06-21 20:40:01,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:01,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:40:01,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:01,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:40:01,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:40:02,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:40:02,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 404 transitions, 4582 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:02,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:02,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:40:02,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:02,565 INFO L124 PetriNetUnfolderBase]: 930/1621 cut-off events. [2024-06-21 20:40:02,565 INFO L125 PetriNetUnfolderBase]: For 155655/155655 co-relation queries the response was YES. [2024-06-21 20:40:02,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11252 conditions, 1621 events. 930/1621 cut-off events. For 155655/155655 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 8879 event pairs, 148 based on Foata normal form. 2/1622 useless extension candidates. Maximal degree in co-relation 11085. Up to 1572 conditions per place. [2024-06-21 20:40:02,584 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 399 selfloop transitions, 19 changer transitions 0/420 dead transitions. [2024-06-21 20:40:02,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 420 transitions, 5507 flow [2024-06-21 20:40:02,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:40:02,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:40:02,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 111 transitions. [2024-06-21 20:40:02,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.346875 [2024-06-21 20:40:02,585 INFO L175 Difference]: Start difference. First operand has 390 places, 404 transitions, 4582 flow. Second operand 10 states and 111 transitions. [2024-06-21 20:40:02,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 420 transitions, 5507 flow [2024-06-21 20:40:03,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 420 transitions, 5459 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-21 20:40:03,180 INFO L231 Difference]: Finished difference. Result has 391 places, 407 transitions, 4633 flow [2024-06-21 20:40:03,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4534, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4633, PETRI_PLACES=391, PETRI_TRANSITIONS=407} [2024-06-21 20:40:03,180 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 360 predicate places. [2024-06-21 20:40:03,181 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 407 transitions, 4633 flow [2024-06-21 20:40:03,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:03,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:03,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:03,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 20:40:03,181 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:40:03,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:03,182 INFO L85 PathProgramCache]: Analyzing trace with hash 637740863, now seen corresponding path program 14 times [2024-06-21 20:40:03,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:03,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580800984] [2024-06-21 20:40:03,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:03,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:03,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:04,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:04,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:04,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580800984] [2024-06-21 20:40:04,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580800984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:04,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:04,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:40:04,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801782147] [2024-06-21 20:40:04,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:04,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:40:04,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:04,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:40:04,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:40:04,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:40:04,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 407 transitions, 4633 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:04,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:04,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:40:04,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:05,152 INFO L124 PetriNetUnfolderBase]: 934/1629 cut-off events. [2024-06-21 20:40:05,152 INFO L125 PetriNetUnfolderBase]: For 158654/158654 co-relation queries the response was YES. [2024-06-21 20:40:05,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11351 conditions, 1629 events. 934/1629 cut-off events. For 158654/158654 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 8951 event pairs, 150 based on Foata normal form. 2/1630 useless extension candidates. Maximal degree in co-relation 11183. Up to 1563 conditions per place. [2024-06-21 20:40:05,173 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 396 selfloop transitions, 23 changer transitions 0/421 dead transitions. [2024-06-21 20:40:05,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 421 transitions, 5537 flow [2024-06-21 20:40:05,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:40:05,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:40:05,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-21 20:40:05,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.353125 [2024-06-21 20:40:05,174 INFO L175 Difference]: Start difference. First operand has 391 places, 407 transitions, 4633 flow. Second operand 10 states and 113 transitions. [2024-06-21 20:40:05,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 421 transitions, 5537 flow [2024-06-21 20:40:05,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 421 transitions, 5473 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-21 20:40:05,705 INFO L231 Difference]: Finished difference. Result has 394 places, 408 transitions, 4653 flow [2024-06-21 20:40:05,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4569, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4653, PETRI_PLACES=394, PETRI_TRANSITIONS=408} [2024-06-21 20:40:05,706 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 363 predicate places. [2024-06-21 20:40:05,706 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 408 transitions, 4653 flow [2024-06-21 20:40:05,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:05,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:05,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:05,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 20:40:05,706 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:40:05,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:05,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1856846577, now seen corresponding path program 15 times [2024-06-21 20:40:05,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:05,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970464864] [2024-06-21 20:40:05,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:05,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:05,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:06,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:06,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:06,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970464864] [2024-06-21 20:40:06,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970464864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:06,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:06,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:40:06,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643834903] [2024-06-21 20:40:06,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:06,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:40:06,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:06,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:40:06,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:40:06,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:40:06,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 408 transitions, 4653 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:06,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:06,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:40:06,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:07,444 INFO L124 PetriNetUnfolderBase]: 931/1624 cut-off events. [2024-06-21 20:40:07,444 INFO L125 PetriNetUnfolderBase]: For 146571/146571 co-relation queries the response was YES. [2024-06-21 20:40:07,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11054 conditions, 1624 events. 931/1624 cut-off events. For 146571/146571 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 8910 event pairs, 149 based on Foata normal form. 2/1625 useless extension candidates. Maximal degree in co-relation 10885. Up to 1555 conditions per place. [2024-06-21 20:40:07,465 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 397 selfloop transitions, 21 changer transitions 0/420 dead transitions. [2024-06-21 20:40:07,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 420 transitions, 5517 flow [2024-06-21 20:40:07,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:40:07,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:40:07,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-21 20:40:07,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34375 [2024-06-21 20:40:07,466 INFO L175 Difference]: Start difference. First operand has 394 places, 408 transitions, 4653 flow. Second operand 10 states and 110 transitions. [2024-06-21 20:40:07,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 420 transitions, 5517 flow [2024-06-21 20:40:08,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 420 transitions, 5398 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-21 20:40:08,049 INFO L231 Difference]: Finished difference. Result has 395 places, 408 transitions, 4580 flow [2024-06-21 20:40:08,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4534, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4580, PETRI_PLACES=395, PETRI_TRANSITIONS=408} [2024-06-21 20:40:08,050 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 364 predicate places. [2024-06-21 20:40:08,050 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 408 transitions, 4580 flow [2024-06-21 20:40:08,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:08,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:08,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:08,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 20:40:08,050 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:40:08,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:08,050 INFO L85 PathProgramCache]: Analyzing trace with hash 2033432143, now seen corresponding path program 1 times [2024-06-21 20:40:08,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:08,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189228972] [2024-06-21 20:40:08,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:08,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:08,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:09,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:09,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:09,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189228972] [2024-06-21 20:40:09,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189228972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:09,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:09,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:40:09,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882047186] [2024-06-21 20:40:09,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:09,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:40:09,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:09,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:40:09,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:40:09,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:40:09,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 408 transitions, 4580 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:09,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:09,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:40:09,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:09,788 INFO L124 PetriNetUnfolderBase]: 978/1717 cut-off events. [2024-06-21 20:40:09,788 INFO L125 PetriNetUnfolderBase]: For 251687/251687 co-relation queries the response was YES. [2024-06-21 20:40:09,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13261 conditions, 1717 events. 978/1717 cut-off events. For 251687/251687 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 9457 event pairs, 99 based on Foata normal form. 2/1718 useless extension candidates. Maximal degree in co-relation 13092. Up to 1455 conditions per place. [2024-06-21 20:40:09,810 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 402 selfloop transitions, 41 changer transitions 0/445 dead transitions. [2024-06-21 20:40:09,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 445 transitions, 5970 flow [2024-06-21 20:40:09,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:40:09,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:40:09,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 162 transitions. [2024-06-21 20:40:09,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3894230769230769 [2024-06-21 20:40:09,811 INFO L175 Difference]: Start difference. First operand has 395 places, 408 transitions, 4580 flow. Second operand 13 states and 162 transitions. [2024-06-21 20:40:09,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 445 transitions, 5970 flow [2024-06-21 20:40:10,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 445 transitions, 5777 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-21 20:40:10,614 INFO L231 Difference]: Finished difference. Result has 398 places, 410 transitions, 4547 flow [2024-06-21 20:40:10,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4387, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4547, PETRI_PLACES=398, PETRI_TRANSITIONS=410} [2024-06-21 20:40:10,614 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 367 predicate places. [2024-06-21 20:40:10,614 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 410 transitions, 4547 flow [2024-06-21 20:40:10,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:10,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:10,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:10,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 20:40:10,615 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:40:10,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:10,616 INFO L85 PathProgramCache]: Analyzing trace with hash 259501145, now seen corresponding path program 2 times [2024-06-21 20:40:10,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:10,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98253811] [2024-06-21 20:40:10,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:10,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:10,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:11,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:11,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:11,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98253811] [2024-06-21 20:40:11,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98253811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:11,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:11,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:40:11,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385068532] [2024-06-21 20:40:11,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:11,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:40:11,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:11,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:40:11,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:40:11,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:40:11,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 410 transitions, 4547 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:11,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:11,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:40:11,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:12,751 INFO L124 PetriNetUnfolderBase]: 966/1697 cut-off events. [2024-06-21 20:40:12,751 INFO L125 PetriNetUnfolderBase]: For 255266/255266 co-relation queries the response was YES. [2024-06-21 20:40:12,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11581 conditions, 1697 events. 966/1697 cut-off events. For 255266/255266 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 9414 event pairs, 105 based on Foata normal form. 14/1710 useless extension candidates. Maximal degree in co-relation 11412. Up to 1520 conditions per place. [2024-06-21 20:40:12,772 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 392 selfloop transitions, 39 changer transitions 11/444 dead transitions. [2024-06-21 20:40:12,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 444 transitions, 5655 flow [2024-06-21 20:40:12,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 20:40:12,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 20:40:12,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 166 transitions. [2024-06-21 20:40:12,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3705357142857143 [2024-06-21 20:40:12,773 INFO L175 Difference]: Start difference. First operand has 398 places, 410 transitions, 4547 flow. Second operand 14 states and 166 transitions. [2024-06-21 20:40:12,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 444 transitions, 5655 flow [2024-06-21 20:40:13,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 444 transitions, 5496 flow, removed 23 selfloop flow, removed 10 redundant places. [2024-06-21 20:40:13,459 INFO L231 Difference]: Finished difference. Result has 402 places, 407 transitions, 4483 flow [2024-06-21 20:40:13,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4394, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4483, PETRI_PLACES=402, PETRI_TRANSITIONS=407} [2024-06-21 20:40:13,459 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 371 predicate places. [2024-06-21 20:40:13,460 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 407 transitions, 4483 flow [2024-06-21 20:40:13,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:13,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:13,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:13,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 20:40:13,460 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:40:13,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:13,461 INFO L85 PathProgramCache]: Analyzing trace with hash 2035306093, now seen corresponding path program 3 times [2024-06-21 20:40:13,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:13,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245099978] [2024-06-21 20:40:13,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:13,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:13,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:14,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:14,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:14,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245099978] [2024-06-21 20:40:14,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245099978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:14,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:14,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:40:14,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493497667] [2024-06-21 20:40:14,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:14,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:40:14,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:14,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:40:14,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:40:14,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:40:14,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 407 transitions, 4483 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:14,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:14,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:40:14,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:15,370 INFO L124 PetriNetUnfolderBase]: 929/1626 cut-off events. [2024-06-21 20:40:15,370 INFO L125 PetriNetUnfolderBase]: For 156149/156149 co-relation queries the response was YES. [2024-06-21 20:40:15,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10769 conditions, 1626 events. 929/1626 cut-off events. For 156149/156149 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 8983 event pairs, 98 based on Foata normal form. 2/1627 useless extension candidates. Maximal degree in co-relation 10599. Up to 1491 conditions per place. [2024-06-21 20:40:15,390 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 392 selfloop transitions, 39 changer transitions 0/433 dead transitions. [2024-06-21 20:40:15,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 433 transitions, 5425 flow [2024-06-21 20:40:15,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:40:15,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:40:15,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 150 transitions. [2024-06-21 20:40:15,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3605769230769231 [2024-06-21 20:40:15,391 INFO L175 Difference]: Start difference. First operand has 402 places, 407 transitions, 4483 flow. Second operand 13 states and 150 transitions. [2024-06-21 20:40:15,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 433 transitions, 5425 flow [2024-06-21 20:40:16,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 433 transitions, 5289 flow, removed 30 selfloop flow, removed 12 redundant places. [2024-06-21 20:40:16,008 INFO L231 Difference]: Finished difference. Result has 403 places, 407 transitions, 4430 flow [2024-06-21 20:40:16,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4347, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4430, PETRI_PLACES=403, PETRI_TRANSITIONS=407} [2024-06-21 20:40:16,008 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 372 predicate places. [2024-06-21 20:40:16,008 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 407 transitions, 4430 flow [2024-06-21 20:40:16,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:16,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:16,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:16,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 20:40:16,009 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:40:16,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:16,009 INFO L85 PathProgramCache]: Analyzing trace with hash 2035309968, now seen corresponding path program 1 times [2024-06-21 20:40:16,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:16,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751382966] [2024-06-21 20:40:16,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:16,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:16,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:17,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:17,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:17,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751382966] [2024-06-21 20:40:17,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751382966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:17,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:17,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:40:17,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044160469] [2024-06-21 20:40:17,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:17,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:40:17,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:17,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:40:17,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:40:17,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:40:17,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 407 transitions, 4430 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:17,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:17,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:40:17,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:17,875 INFO L124 PetriNetUnfolderBase]: 948/1657 cut-off events. [2024-06-21 20:40:17,875 INFO L125 PetriNetUnfolderBase]: For 175152/175152 co-relation queries the response was YES. [2024-06-21 20:40:17,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11309 conditions, 1657 events. 948/1657 cut-off events. For 175152/175152 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 9160 event pairs, 100 based on Foata normal form. 2/1658 useless extension candidates. Maximal degree in co-relation 11138. Up to 1536 conditions per place. [2024-06-21 20:40:17,896 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 397 selfloop transitions, 41 changer transitions 0/440 dead transitions. [2024-06-21 20:40:17,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 440 transitions, 5812 flow [2024-06-21 20:40:17,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:40:17,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:40:17,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 154 transitions. [2024-06-21 20:40:17,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3701923076923077 [2024-06-21 20:40:17,897 INFO L175 Difference]: Start difference. First operand has 403 places, 407 transitions, 4430 flow. Second operand 13 states and 154 transitions. [2024-06-21 20:40:17,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 440 transitions, 5812 flow [2024-06-21 20:40:18,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 440 transitions, 5723 flow, removed 1 selfloop flow, removed 12 redundant places. [2024-06-21 20:40:18,531 INFO L231 Difference]: Finished difference. Result has 405 places, 413 transitions, 4609 flow [2024-06-21 20:40:18,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4346, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4609, PETRI_PLACES=405, PETRI_TRANSITIONS=413} [2024-06-21 20:40:18,531 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 374 predicate places. [2024-06-21 20:40:18,532 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 413 transitions, 4609 flow [2024-06-21 20:40:18,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:18,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:18,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:18,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 20:40:18,532 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:40:18,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:18,532 INFO L85 PathProgramCache]: Analyzing trace with hash 2122001778, now seen corresponding path program 2 times [2024-06-21 20:40:18,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:18,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40175845] [2024-06-21 20:40:18,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:18,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:18,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:19,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:19,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:19,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40175845] [2024-06-21 20:40:19,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40175845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:19,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:19,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:40:19,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76040392] [2024-06-21 20:40:19,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:19,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:40:19,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:19,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:40:19,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:40:19,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:40:19,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 413 transitions, 4609 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:19,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:19,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:40:19,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:20,421 INFO L124 PetriNetUnfolderBase]: 957/1672 cut-off events. [2024-06-21 20:40:20,421 INFO L125 PetriNetUnfolderBase]: For 179551/179551 co-relation queries the response was YES. [2024-06-21 20:40:20,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11524 conditions, 1672 events. 957/1672 cut-off events. For 179551/179551 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 9267 event pairs, 100 based on Foata normal form. 2/1673 useless extension candidates. Maximal degree in co-relation 11351. Up to 1565 conditions per place. [2024-06-21 20:40:20,443 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 400 selfloop transitions, 38 changer transitions 0/440 dead transitions. [2024-06-21 20:40:20,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 440 transitions, 5900 flow [2024-06-21 20:40:20,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:40:20,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:40:20,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 141 transitions. [2024-06-21 20:40:20,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3671875 [2024-06-21 20:40:20,444 INFO L175 Difference]: Start difference. First operand has 405 places, 413 transitions, 4609 flow. Second operand 12 states and 141 transitions. [2024-06-21 20:40:20,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 440 transitions, 5900 flow [2024-06-21 20:40:21,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 440 transitions, 5752 flow, removed 50 selfloop flow, removed 8 redundant places. [2024-06-21 20:40:21,145 INFO L231 Difference]: Finished difference. Result has 410 places, 417 transitions, 4644 flow [2024-06-21 20:40:21,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4473, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4644, PETRI_PLACES=410, PETRI_TRANSITIONS=417} [2024-06-21 20:40:21,146 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 379 predicate places. [2024-06-21 20:40:21,146 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 417 transitions, 4644 flow [2024-06-21 20:40:21,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:21,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:21,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:21,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 20:40:21,146 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:40:21,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:21,147 INFO L85 PathProgramCache]: Analyzing trace with hash 2122145928, now seen corresponding path program 3 times [2024-06-21 20:40:21,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:21,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329787769] [2024-06-21 20:40:21,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:21,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:21,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:22,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:22,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:22,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329787769] [2024-06-21 20:40:22,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329787769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:22,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:22,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:40:22,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732178711] [2024-06-21 20:40:22,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:22,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:40:22,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:22,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:40:22,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:40:22,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:40:22,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 417 transitions, 4644 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:22,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:22,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:40:22,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:23,003 INFO L124 PetriNetUnfolderBase]: 953/1666 cut-off events. [2024-06-21 20:40:23,003 INFO L125 PetriNetUnfolderBase]: For 165862/165862 co-relation queries the response was YES. [2024-06-21 20:40:23,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11112 conditions, 1666 events. 953/1666 cut-off events. For 165862/165862 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 9231 event pairs, 99 based on Foata normal form. 2/1667 useless extension candidates. Maximal degree in co-relation 10936. Up to 1574 conditions per place. [2024-06-21 20:40:23,026 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 402 selfloop transitions, 34 changer transitions 0/438 dead transitions. [2024-06-21 20:40:23,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 438 transitions, 5578 flow [2024-06-21 20:40:23,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:40:23,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:40:23,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 136 transitions. [2024-06-21 20:40:23,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3541666666666667 [2024-06-21 20:40:23,028 INFO L175 Difference]: Start difference. First operand has 410 places, 417 transitions, 4644 flow. Second operand 12 states and 136 transitions. [2024-06-21 20:40:23,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 438 transitions, 5578 flow [2024-06-21 20:40:23,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 438 transitions, 5383 flow, removed 60 selfloop flow, removed 9 redundant places. [2024-06-21 20:40:23,772 INFO L231 Difference]: Finished difference. Result has 413 places, 417 transitions, 4522 flow [2024-06-21 20:40:23,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4449, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4522, PETRI_PLACES=413, PETRI_TRANSITIONS=417} [2024-06-21 20:40:23,772 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 382 predicate places. [2024-06-21 20:40:23,773 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 417 transitions, 4522 flow [2024-06-21 20:40:23,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:23,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:23,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:23,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 20:40:23,773 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:40:23,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:23,774 INFO L85 PathProgramCache]: Analyzing trace with hash -369026060, now seen corresponding path program 1 times [2024-06-21 20:40:23,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:23,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230740319] [2024-06-21 20:40:23,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:23,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:23,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:25,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:25,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:25,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230740319] [2024-06-21 20:40:25,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230740319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:25,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:25,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:40:25,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885401380] [2024-06-21 20:40:25,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:25,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:40:25,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:25,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:40:25,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:40:25,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:40:25,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 417 transitions, 4522 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:25,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:25,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:40:25,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:25,698 INFO L124 PetriNetUnfolderBase]: 957/1674 cut-off events. [2024-06-21 20:40:25,698 INFO L125 PetriNetUnfolderBase]: For 166186/166186 co-relation queries the response was YES. [2024-06-21 20:40:25,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10958 conditions, 1674 events. 957/1674 cut-off events. For 166186/166186 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 9269 event pairs, 65 based on Foata normal form. 2/1675 useless extension candidates. Maximal degree in co-relation 10781. Up to 1146 conditions per place. [2024-06-21 20:40:25,719 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 276 selfloop transitions, 161 changer transitions 0/439 dead transitions. [2024-06-21 20:40:25,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 439 transitions, 5462 flow [2024-06-21 20:40:25,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:40:25,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:40:25,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 139 transitions. [2024-06-21 20:40:25,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39488636363636365 [2024-06-21 20:40:25,720 INFO L175 Difference]: Start difference. First operand has 413 places, 417 transitions, 4522 flow. Second operand 11 states and 139 transitions. [2024-06-21 20:40:25,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 439 transitions, 5462 flow [2024-06-21 20:40:26,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 439 transitions, 5352 flow, removed 5 selfloop flow, removed 14 redundant places. [2024-06-21 20:40:26,248 INFO L231 Difference]: Finished difference. Result has 410 places, 418 transitions, 4751 flow [2024-06-21 20:40:26,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4412, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4751, PETRI_PLACES=410, PETRI_TRANSITIONS=418} [2024-06-21 20:40:26,249 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 379 predicate places. [2024-06-21 20:40:26,249 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 418 transitions, 4751 flow [2024-06-21 20:40:26,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:26,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:26,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:26,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 20:40:26,250 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:40:26,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:26,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1406567282, now seen corresponding path program 4 times [2024-06-21 20:40:26,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:26,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497460707] [2024-06-21 20:40:26,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:26,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:26,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:27,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:27,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:27,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497460707] [2024-06-21 20:40:27,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497460707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:27,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:27,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:40:27,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187400341] [2024-06-21 20:40:27,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:27,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:40:27,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:27,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:40:27,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:40:27,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:40:27,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 418 transitions, 4751 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:27,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:27,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:40:27,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:28,228 INFO L124 PetriNetUnfolderBase]: 969/1694 cut-off events. [2024-06-21 20:40:28,228 INFO L125 PetriNetUnfolderBase]: For 170798/170798 co-relation queries the response was YES. [2024-06-21 20:40:28,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11432 conditions, 1694 events. 969/1694 cut-off events. For 170798/170798 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 9409 event pairs, 61 based on Foata normal form. 2/1695 useless extension candidates. Maximal degree in co-relation 11257. Up to 879 conditions per place. [2024-06-21 20:40:28,249 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 277 selfloop transitions, 170 changer transitions 0/449 dead transitions. [2024-06-21 20:40:28,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 449 transitions, 5825 flow [2024-06-21 20:40:28,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:40:28,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:40:28,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 167 transitions. [2024-06-21 20:40:28,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4014423076923077 [2024-06-21 20:40:28,250 INFO L175 Difference]: Start difference. First operand has 410 places, 418 transitions, 4751 flow. Second operand 13 states and 167 transitions. [2024-06-21 20:40:28,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 449 transitions, 5825 flow [2024-06-21 20:40:28,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 449 transitions, 5484 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 20:40:28,831 INFO L231 Difference]: Finished difference. Result has 414 places, 422 transitions, 4853 flow [2024-06-21 20:40:28,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4410, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4853, PETRI_PLACES=414, PETRI_TRANSITIONS=422} [2024-06-21 20:40:28,831 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 383 predicate places. [2024-06-21 20:40:28,832 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 422 transitions, 4853 flow [2024-06-21 20:40:28,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:28,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:28,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:28,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 20:40:28,832 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:40:28,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:28,832 INFO L85 PathProgramCache]: Analyzing trace with hash -369241541, now seen corresponding path program 4 times [2024-06-21 20:40:28,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:28,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202373628] [2024-06-21 20:40:28,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:28,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:28,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:29,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:29,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:29,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202373628] [2024-06-21 20:40:29,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202373628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:29,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:29,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:40:29,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303025808] [2024-06-21 20:40:29,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:29,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:40:29,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:29,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:40:29,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:40:29,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:40:29,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 422 transitions, 4853 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:29,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:29,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:40:29,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:30,531 INFO L124 PetriNetUnfolderBase]: 973/1702 cut-off events. [2024-06-21 20:40:30,531 INFO L125 PetriNetUnfolderBase]: For 173968/173968 co-relation queries the response was YES. [2024-06-21 20:40:30,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11548 conditions, 1702 events. 973/1702 cut-off events. For 173968/173968 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 9495 event pairs, 91 based on Foata normal form. 2/1703 useless extension candidates. Maximal degree in co-relation 11373. Up to 1359 conditions per place. [2024-06-21 20:40:30,563 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 316 selfloop transitions, 124 changer transitions 0/442 dead transitions. [2024-06-21 20:40:30,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 442 transitions, 5825 flow [2024-06-21 20:40:30,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:40:30,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:40:30,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 144 transitions. [2024-06-21 20:40:30,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 20:40:30,564 INFO L175 Difference]: Start difference. First operand has 414 places, 422 transitions, 4853 flow. Second operand 12 states and 144 transitions. [2024-06-21 20:40:30,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 442 transitions, 5825 flow [2024-06-21 20:40:31,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 442 transitions, 5412 flow, removed 39 selfloop flow, removed 10 redundant places. [2024-06-21 20:40:31,389 INFO L231 Difference]: Finished difference. Result has 416 places, 423 transitions, 4732 flow [2024-06-21 20:40:31,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4440, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4732, PETRI_PLACES=416, PETRI_TRANSITIONS=423} [2024-06-21 20:40:31,389 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 385 predicate places. [2024-06-21 20:40:31,390 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 423 transitions, 4732 flow [2024-06-21 20:40:31,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:31,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:31,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:31,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 20:40:31,390 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:40:31,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:31,391 INFO L85 PathProgramCache]: Analyzing trace with hash -374751791, now seen corresponding path program 5 times [2024-06-21 20:40:31,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:31,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774141823] [2024-06-21 20:40:31,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:31,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:31,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:32,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:32,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:32,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774141823] [2024-06-21 20:40:32,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774141823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:32,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:32,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:40:32,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766730034] [2024-06-21 20:40:32,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:32,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:40:32,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:32,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:40:32,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:40:32,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:40:32,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 423 transitions, 4732 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:32,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:32,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:40:32,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:33,076 INFO L124 PetriNetUnfolderBase]: 984/1723 cut-off events. [2024-06-21 20:40:33,076 INFO L125 PetriNetUnfolderBase]: For 193059/193059 co-relation queries the response was YES. [2024-06-21 20:40:33,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11779 conditions, 1723 events. 984/1723 cut-off events. For 193059/193059 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 9634 event pairs, 98 based on Foata normal form. 2/1724 useless extension candidates. Maximal degree in co-relation 11603. Up to 1346 conditions per place. [2024-06-21 20:40:33,095 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 314 selfloop transitions, 130 changer transitions 0/446 dead transitions. [2024-06-21 20:40:33,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 446 transitions, 6018 flow [2024-06-21 20:40:33,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:40:33,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:40:33,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 148 transitions. [2024-06-21 20:40:33,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3854166666666667 [2024-06-21 20:40:33,096 INFO L175 Difference]: Start difference. First operand has 416 places, 423 transitions, 4732 flow. Second operand 12 states and 148 transitions. [2024-06-21 20:40:33,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 446 transitions, 6018 flow [2024-06-21 20:40:33,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 446 transitions, 5724 flow, removed 18 selfloop flow, removed 10 redundant places. [2024-06-21 20:40:33,841 INFO L231 Difference]: Finished difference. Result has 418 places, 425 transitions, 4784 flow [2024-06-21 20:40:33,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4438, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4784, PETRI_PLACES=418, PETRI_TRANSITIONS=425} [2024-06-21 20:40:33,842 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 387 predicate places. [2024-06-21 20:40:33,842 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 425 transitions, 4784 flow [2024-06-21 20:40:33,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:33,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:33,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:33,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 20:40:33,842 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:40:33,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:33,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1401204902, now seen corresponding path program 5 times [2024-06-21 20:40:33,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:33,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637881714] [2024-06-21 20:40:33,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:33,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:33,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:34,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:34,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:34,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637881714] [2024-06-21 20:40:34,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637881714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:34,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:34,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:40:34,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141636456] [2024-06-21 20:40:34,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:34,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:40:34,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:34,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:40:34,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:40:35,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:40:35,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 425 transitions, 4784 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:35,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:35,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:40:35,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:35,764 INFO L124 PetriNetUnfolderBase]: 1000/1749 cut-off events. [2024-06-21 20:40:35,764 INFO L125 PetriNetUnfolderBase]: For 215325/215325 co-relation queries the response was YES. [2024-06-21 20:40:35,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12387 conditions, 1749 events. 1000/1749 cut-off events. For 215325/215325 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 9795 event pairs, 66 based on Foata normal form. 2/1750 useless extension candidates. Maximal degree in co-relation 12210. Up to 935 conditions per place. [2024-06-21 20:40:35,785 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 286 selfloop transitions, 169 changer transitions 0/457 dead transitions. [2024-06-21 20:40:35,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 457 transitions, 6212 flow [2024-06-21 20:40:35,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:40:35,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:40:35,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 169 transitions. [2024-06-21 20:40:35,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-21 20:40:35,787 INFO L175 Difference]: Start difference. First operand has 418 places, 425 transitions, 4784 flow. Second operand 13 states and 169 transitions. [2024-06-21 20:40:35,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 457 transitions, 6212 flow [2024-06-21 20:40:36,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 457 transitions, 5911 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-21 20:40:36,473 INFO L231 Difference]: Finished difference. Result has 422 places, 429 transitions, 4998 flow [2024-06-21 20:40:36,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4483, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4998, PETRI_PLACES=422, PETRI_TRANSITIONS=429} [2024-06-21 20:40:36,474 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 391 predicate places. [2024-06-21 20:40:36,474 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 429 transitions, 4998 flow [2024-06-21 20:40:36,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:36,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:36,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:36,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 20:40:36,474 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:40:36,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:36,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1401060752, now seen corresponding path program 6 times [2024-06-21 20:40:36,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:36,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037823067] [2024-06-21 20:40:36,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:36,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:36,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:37,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:37,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:37,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037823067] [2024-06-21 20:40:37,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037823067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:37,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:37,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:40:37,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049853144] [2024-06-21 20:40:37,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:37,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:40:37,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:37,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:40:37,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:40:37,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:40:37,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 429 transitions, 4998 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:37,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:37,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:40:37,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:38,578 INFO L124 PetriNetUnfolderBase]: 1150/2001 cut-off events. [2024-06-21 20:40:38,578 INFO L125 PetriNetUnfolderBase]: For 240139/240139 co-relation queries the response was YES. [2024-06-21 20:40:38,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14421 conditions, 2001 events. 1150/2001 cut-off events. For 240139/240139 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 11539 event pairs, 186 based on Foata normal form. 2/2002 useless extension candidates. Maximal degree in co-relation 14243. Up to 1464 conditions per place. [2024-06-21 20:40:38,605 INFO L140 encePairwiseOnDemand]: 18/32 looper letters, 389 selfloop transitions, 133 changer transitions 0/524 dead transitions. [2024-06-21 20:40:38,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 524 transitions, 7250 flow [2024-06-21 20:40:38,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-21 20:40:38,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-21 20:40:38,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 182 transitions. [2024-06-21 20:40:38,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37916666666666665 [2024-06-21 20:40:38,606 INFO L175 Difference]: Start difference. First operand has 422 places, 429 transitions, 4998 flow. Second operand 15 states and 182 transitions. [2024-06-21 20:40:38,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 524 transitions, 7250 flow [2024-06-21 20:40:39,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 524 transitions, 6770 flow, removed 98 selfloop flow, removed 10 redundant places. [2024-06-21 20:40:39,597 INFO L231 Difference]: Finished difference. Result has 434 places, 484 transitions, 5769 flow [2024-06-21 20:40:39,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4661, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5769, PETRI_PLACES=434, PETRI_TRANSITIONS=484} [2024-06-21 20:40:39,597 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 403 predicate places. [2024-06-21 20:40:39,598 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 484 transitions, 5769 flow [2024-06-21 20:40:39,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:39,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:39,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:39,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 20:40:39,598 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:40:39,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:39,599 INFO L85 PathProgramCache]: Analyzing trace with hash -374748071, now seen corresponding path program 6 times [2024-06-21 20:40:39,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:39,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467175284] [2024-06-21 20:40:39,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:39,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:39,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:40,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:40,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:40,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467175284] [2024-06-21 20:40:40,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467175284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:40,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:40,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:40:40,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091561941] [2024-06-21 20:40:40,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:40,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:40:40,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:40,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:40:40,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:40:40,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:40:40,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 484 transitions, 5769 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:40,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:40,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:40:40,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:41,351 INFO L124 PetriNetUnfolderBase]: 1154/2009 cut-off events. [2024-06-21 20:40:41,351 INFO L125 PetriNetUnfolderBase]: For 240670/240670 co-relation queries the response was YES. [2024-06-21 20:40:41,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14694 conditions, 2009 events. 1154/2009 cut-off events. For 240670/240670 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 11559 event pairs, 108 based on Foata normal form. 2/2010 useless extension candidates. Maximal degree in co-relation 14508. Up to 1616 conditions per place. [2024-06-21 20:40:41,379 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 350 selfloop transitions, 152 changer transitions 0/504 dead transitions. [2024-06-21 20:40:41,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 504 transitions, 6857 flow [2024-06-21 20:40:41,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:40:41,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:40:41,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 146 transitions. [2024-06-21 20:40:41,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3802083333333333 [2024-06-21 20:40:41,380 INFO L175 Difference]: Start difference. First operand has 434 places, 484 transitions, 5769 flow. Second operand 12 states and 146 transitions. [2024-06-21 20:40:41,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 504 transitions, 6857 flow [2024-06-21 20:40:42,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 504 transitions, 6631 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-21 20:40:42,460 INFO L231 Difference]: Finished difference. Result has 440 places, 485 transitions, 5884 flow [2024-06-21 20:40:42,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=5543, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5884, PETRI_PLACES=440, PETRI_TRANSITIONS=485} [2024-06-21 20:40:42,461 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 409 predicate places. [2024-06-21 20:40:42,461 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 485 transitions, 5884 flow [2024-06-21 20:40:42,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:42,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:42,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:42,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 20:40:42,461 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:40:42,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:42,461 INFO L85 PathProgramCache]: Analyzing trace with hash 2053591414, now seen corresponding path program 7 times [2024-06-21 20:40:42,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:42,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773248748] [2024-06-21 20:40:42,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:42,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:42,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:43,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:43,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:43,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773248748] [2024-06-21 20:40:43,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773248748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:43,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:43,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:40:43,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985398368] [2024-06-21 20:40:43,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:43,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:40:43,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:43,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:40:43,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:40:43,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:40:43,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 485 transitions, 5884 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:43,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:43,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:40:43,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:44,315 INFO L124 PetriNetUnfolderBase]: 1146/1997 cut-off events. [2024-06-21 20:40:44,315 INFO L125 PetriNetUnfolderBase]: For 225022/225022 co-relation queries the response was YES. [2024-06-21 20:40:44,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14016 conditions, 1997 events. 1146/1997 cut-off events. For 225022/225022 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 11494 event pairs, 70 based on Foata normal form. 4/2000 useless extension candidates. Maximal degree in co-relation 13829. Up to 1102 conditions per place. [2024-06-21 20:40:44,342 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 303 selfloop transitions, 205 changer transitions 0/510 dead transitions. [2024-06-21 20:40:44,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 510 transitions, 6980 flow [2024-06-21 20:40:44,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:40:44,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:40:44,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 157 transitions. [2024-06-21 20:40:44,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4088541666666667 [2024-06-21 20:40:44,343 INFO L175 Difference]: Start difference. First operand has 440 places, 485 transitions, 5884 flow. Second operand 12 states and 157 transitions. [2024-06-21 20:40:44,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 510 transitions, 6980 flow [2024-06-21 20:40:45,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 510 transitions, 6529 flow, removed 75 selfloop flow, removed 10 redundant places. [2024-06-21 20:40:45,257 INFO L231 Difference]: Finished difference. Result has 442 places, 485 transitions, 5851 flow [2024-06-21 20:40:45,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=5433, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5851, PETRI_PLACES=442, PETRI_TRANSITIONS=485} [2024-06-21 20:40:45,258 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 411 predicate places. [2024-06-21 20:40:45,258 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 485 transitions, 5851 flow [2024-06-21 20:40:45,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:45,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:45,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:45,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 20:40:45,259 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:40:45,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:45,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1401204747, now seen corresponding path program 7 times [2024-06-21 20:40:45,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:45,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905500958] [2024-06-21 20:40:45,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:45,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:45,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:46,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:46,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:46,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905500958] [2024-06-21 20:40:46,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905500958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:46,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:46,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:40:46,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097011444] [2024-06-21 20:40:46,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:46,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:40:46,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:46,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:40:46,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:40:46,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:40:46,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 485 transitions, 5851 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:46,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:46,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:40:46,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:47,016 INFO L124 PetriNetUnfolderBase]: 1163/2036 cut-off events. [2024-06-21 20:40:47,016 INFO L125 PetriNetUnfolderBase]: For 298330/298330 co-relation queries the response was YES. [2024-06-21 20:40:47,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13963 conditions, 2036 events. 1163/2036 cut-off events. For 298330/298330 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 11746 event pairs, 69 based on Foata normal form. 14/2049 useless extension candidates. Maximal degree in co-relation 13775. Up to 1067 conditions per place. [2024-06-21 20:40:47,045 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 297 selfloop transitions, 200 changer transitions 17/516 dead transitions. [2024-06-21 20:40:47,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 516 transitions, 7071 flow [2024-06-21 20:40:47,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:40:47,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:40:47,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 164 transitions. [2024-06-21 20:40:47,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4270833333333333 [2024-06-21 20:40:47,046 INFO L175 Difference]: Start difference. First operand has 442 places, 485 transitions, 5851 flow. Second operand 12 states and 164 transitions. [2024-06-21 20:40:47,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 516 transitions, 7071 flow [2024-06-21 20:40:47,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 516 transitions, 6627 flow, removed 14 selfloop flow, removed 11 redundant places. [2024-06-21 20:40:47,804 INFO L231 Difference]: Finished difference. Result has 443 places, 475 transitions, 5728 flow [2024-06-21 20:40:47,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=5407, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5728, PETRI_PLACES=443, PETRI_TRANSITIONS=475} [2024-06-21 20:40:47,805 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 412 predicate places. [2024-06-21 20:40:47,805 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 475 transitions, 5728 flow [2024-06-21 20:40:47,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:47,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:47,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:47,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 20:40:47,806 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:40:47,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:47,806 INFO L85 PathProgramCache]: Analyzing trace with hash -2053916691, now seen corresponding path program 8 times [2024-06-21 20:40:47,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:47,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742771381] [2024-06-21 20:40:47,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:47,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:47,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:48,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:48,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:48,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742771381] [2024-06-21 20:40:48,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742771381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:48,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:48,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:40:48,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168271551] [2024-06-21 20:40:48,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:48,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:40:48,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:48,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:40:48,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:40:48,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:40:48,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 475 transitions, 5728 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:48,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:48,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:40:48,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:49,612 INFO L124 PetriNetUnfolderBase]: 1145/2010 cut-off events. [2024-06-21 20:40:49,612 INFO L125 PetriNetUnfolderBase]: For 315832/315832 co-relation queries the response was YES. [2024-06-21 20:40:49,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13958 conditions, 2010 events. 1145/2010 cut-off events. For 315832/315832 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 11606 event pairs, 79 based on Foata normal form. 16/2025 useless extension candidates. Maximal degree in co-relation 13780. Up to 1066 conditions per place. [2024-06-21 20:40:49,642 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 318 selfloop transitions, 173 changer transitions 14/507 dead transitions. [2024-06-21 20:40:49,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 507 transitions, 7056 flow [2024-06-21 20:40:49,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:40:49,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:40:49,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 163 transitions. [2024-06-21 20:40:49,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4244791666666667 [2024-06-21 20:40:49,643 INFO L175 Difference]: Start difference. First operand has 443 places, 475 transitions, 5728 flow. Second operand 12 states and 163 transitions. [2024-06-21 20:40:49,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 507 transitions, 7056 flow [2024-06-21 20:40:50,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 507 transitions, 6641 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-21 20:40:50,491 INFO L231 Difference]: Finished difference. Result has 441 places, 471 transitions, 5671 flow [2024-06-21 20:40:50,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=5313, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5671, PETRI_PLACES=441, PETRI_TRANSITIONS=471} [2024-06-21 20:40:50,491 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 410 predicate places. [2024-06-21 20:40:50,491 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 471 transitions, 5671 flow [2024-06-21 20:40:50,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:50,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:50,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:50,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 20:40:50,492 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:40:50,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:50,492 INFO L85 PathProgramCache]: Analyzing trace with hash -2053916536, now seen corresponding path program 8 times [2024-06-21 20:40:50,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:50,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646722632] [2024-06-21 20:40:50,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:50,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:50,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:51,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:51,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:51,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646722632] [2024-06-21 20:40:51,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646722632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:51,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:51,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:40:51,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29002926] [2024-06-21 20:40:51,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:51,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:40:51,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:51,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:40:51,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:40:51,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:40:51,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 471 transitions, 5671 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:51,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:51,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:40:51,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:52,389 INFO L124 PetriNetUnfolderBase]: 1109/1942 cut-off events. [2024-06-21 20:40:52,390 INFO L125 PetriNetUnfolderBase]: For 197088/197088 co-relation queries the response was YES. [2024-06-21 20:40:52,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13511 conditions, 1942 events. 1109/1942 cut-off events. For 197088/197088 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 11231 event pairs, 79 based on Foata normal form. 2/1943 useless extension candidates. Maximal degree in co-relation 13332. Up to 1076 conditions per place. [2024-06-21 20:40:52,416 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 319 selfloop transitions, 174 changer transitions 0/495 dead transitions. [2024-06-21 20:40:52,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 495 transitions, 6823 flow [2024-06-21 20:40:52,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:40:52,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:40:52,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 153 transitions. [2024-06-21 20:40:52,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3984375 [2024-06-21 20:40:52,417 INFO L175 Difference]: Start difference. First operand has 441 places, 471 transitions, 5671 flow. Second operand 12 states and 153 transitions. [2024-06-21 20:40:52,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 495 transitions, 6823 flow [2024-06-21 20:40:53,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 495 transitions, 6432 flow, removed 20 selfloop flow, removed 12 redundant places. [2024-06-21 20:40:53,113 INFO L231 Difference]: Finished difference. Result has 441 places, 473 transitions, 5733 flow [2024-06-21 20:40:53,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=5280, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5733, PETRI_PLACES=441, PETRI_TRANSITIONS=473} [2024-06-21 20:40:53,114 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 410 predicate places. [2024-06-21 20:40:53,114 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 473 transitions, 5733 flow [2024-06-21 20:40:53,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:53,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:53,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:53,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 20:40:53,114 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:40:53,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:53,115 INFO L85 PathProgramCache]: Analyzing trace with hash -2048346766, now seen corresponding path program 9 times [2024-06-21 20:40:53,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:53,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127475516] [2024-06-21 20:40:53,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:53,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:53,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:54,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:54,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:54,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127475516] [2024-06-21 20:40:54,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127475516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:54,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:54,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:40:54,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063835539] [2024-06-21 20:40:54,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:54,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:40:54,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:54,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:40:54,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:40:54,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:40:54,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 473 transitions, 5733 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:54,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:54,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:40:54,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:55,161 INFO L124 PetriNetUnfolderBase]: 1127/1972 cut-off events. [2024-06-21 20:40:55,161 INFO L125 PetriNetUnfolderBase]: For 198361/198361 co-relation queries the response was YES. [2024-06-21 20:40:55,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13744 conditions, 1972 events. 1127/1972 cut-off events. For 198361/198361 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 11438 event pairs, 79 based on Foata normal form. 2/1973 useless extension candidates. Maximal degree in co-relation 13565. Up to 1097 conditions per place. [2024-06-21 20:40:55,190 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 331 selfloop transitions, 169 changer transitions 0/502 dead transitions. [2024-06-21 20:40:55,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 502 transitions, 6951 flow [2024-06-21 20:40:55,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:40:55,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:40:55,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 156 transitions. [2024-06-21 20:40:55,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-21 20:40:55,191 INFO L175 Difference]: Start difference. First operand has 441 places, 473 transitions, 5733 flow. Second operand 12 states and 156 transitions. [2024-06-21 20:40:55,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 502 transitions, 6951 flow [2024-06-21 20:40:55,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 502 transitions, 6506 flow, removed 46 selfloop flow, removed 10 redundant places. [2024-06-21 20:40:55,961 INFO L231 Difference]: Finished difference. Result has 443 places, 479 transitions, 5780 flow [2024-06-21 20:40:55,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=5296, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5780, PETRI_PLACES=443, PETRI_TRANSITIONS=479} [2024-06-21 20:40:55,962 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 412 predicate places. [2024-06-21 20:40:55,962 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 479 transitions, 5780 flow [2024-06-21 20:40:55,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:55,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:55,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:55,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 20:40:55,962 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:40:55,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:55,963 INFO L85 PathProgramCache]: Analyzing trace with hash 892960032, now seen corresponding path program 2 times [2024-06-21 20:40:55,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:55,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072729857] [2024-06-21 20:40:55,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:55,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:55,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:40:57,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:40:57,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:40:57,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072729857] [2024-06-21 20:40:57,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072729857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:40:57,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:40:57,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:40:57,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938099387] [2024-06-21 20:40:57,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:40:57,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:40:57,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:40:57,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:40:57,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:40:57,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:40:57,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 479 transitions, 5780 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:57,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:40:57,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:40:57,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:40:57,802 INFO L124 PetriNetUnfolderBase]: 1131/1980 cut-off events. [2024-06-21 20:40:57,802 INFO L125 PetriNetUnfolderBase]: For 199748/199748 co-relation queries the response was YES. [2024-06-21 20:40:57,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13660 conditions, 1980 events. 1131/1980 cut-off events. For 199748/199748 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 11524 event pairs, 79 based on Foata normal form. 2/1981 useless extension candidates. Maximal degree in co-relation 13480. Up to 1453 conditions per place. [2024-06-21 20:40:57,831 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 364 selfloop transitions, 134 changer transitions 0/500 dead transitions. [2024-06-21 20:40:57,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 500 transitions, 6842 flow [2024-06-21 20:40:57,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:40:57,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:40:57,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 140 transitions. [2024-06-21 20:40:57,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-06-21 20:40:57,832 INFO L175 Difference]: Start difference. First operand has 443 places, 479 transitions, 5780 flow. Second operand 11 states and 140 transitions. [2024-06-21 20:40:57,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 500 transitions, 6842 flow [2024-06-21 20:40:58,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 500 transitions, 6419 flow, removed 55 selfloop flow, removed 8 redundant places. [2024-06-21 20:40:58,639 INFO L231 Difference]: Finished difference. Result has 446 places, 480 transitions, 5643 flow [2024-06-21 20:40:58,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=5357, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5643, PETRI_PLACES=446, PETRI_TRANSITIONS=480} [2024-06-21 20:40:58,639 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 415 predicate places. [2024-06-21 20:40:58,640 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 480 transitions, 5643 flow [2024-06-21 20:40:58,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:40:58,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:40:58,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:40:58,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 20:40:58,640 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:40:58,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:40:58,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1094308752, now seen corresponding path program 3 times [2024-06-21 20:40:58,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:40:58,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094425063] [2024-06-21 20:40:58,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:40:58,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:40:58,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:00,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:00,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:00,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094425063] [2024-06-21 20:41:00,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094425063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:00,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:00,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:41:00,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525905164] [2024-06-21 20:41:00,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:00,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:41:00,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:00,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:41:00,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:41:00,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:41:00,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 480 transitions, 5643 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:00,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:00,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:41:00,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:00,975 INFO L124 PetriNetUnfolderBase]: 1153/2018 cut-off events. [2024-06-21 20:41:00,975 INFO L125 PetriNetUnfolderBase]: For 200863/200863 co-relation queries the response was YES. [2024-06-21 20:41:00,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13653 conditions, 2018 events. 1153/2018 cut-off events. For 200863/200863 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 11793 event pairs, 79 based on Foata normal form. 2/2019 useless extension candidates. Maximal degree in co-relation 13472. Up to 1479 conditions per place. [2024-06-21 20:41:01,004 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 355 selfloop transitions, 149 changer transitions 0/506 dead transitions. [2024-06-21 20:41:01,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 506 transitions, 6791 flow [2024-06-21 20:41:01,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:41:01,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:41:01,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 137 transitions. [2024-06-21 20:41:01,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38920454545454547 [2024-06-21 20:41:01,005 INFO L175 Difference]: Start difference. First operand has 446 places, 480 transitions, 5643 flow. Second operand 11 states and 137 transitions. [2024-06-21 20:41:01,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 506 transitions, 6791 flow [2024-06-21 20:41:01,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 506 transitions, 6503 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 20:41:01,895 INFO L231 Difference]: Finished difference. Result has 448 places, 487 transitions, 5749 flow [2024-06-21 20:41:01,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=5367, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5749, PETRI_PLACES=448, PETRI_TRANSITIONS=487} [2024-06-21 20:41:01,895 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 417 predicate places. [2024-06-21 20:41:01,895 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 487 transitions, 5749 flow [2024-06-21 20:41:01,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:01,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:01,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:01,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 20:41:01,896 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:41:01,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:01,896 INFO L85 PathProgramCache]: Analyzing trace with hash -2054060686, now seen corresponding path program 10 times [2024-06-21 20:41:01,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:01,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874741824] [2024-06-21 20:41:01,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:01,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:01,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:03,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:03,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:03,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874741824] [2024-06-21 20:41:03,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874741824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:03,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:03,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:41:03,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12234765] [2024-06-21 20:41:03,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:03,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:41:03,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:03,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:41:03,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:41:03,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:41:03,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 487 transitions, 5749 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:03,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:03,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:41:03,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:03,996 INFO L124 PetriNetUnfolderBase]: 1202/2099 cut-off events. [2024-06-21 20:41:03,996 INFO L125 PetriNetUnfolderBase]: For 227105/227105 co-relation queries the response was YES. [2024-06-21 20:41:04,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14622 conditions, 2099 events. 1202/2099 cut-off events. For 227105/227105 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 12295 event pairs, 210 based on Foata normal form. 2/2100 useless extension candidates. Maximal degree in co-relation 14440. Up to 1557 conditions per place. [2024-06-21 20:41:04,022 INFO L140 encePairwiseOnDemand]: 18/32 looper letters, 419 selfloop transitions, 120 changer transitions 0/541 dead transitions. [2024-06-21 20:41:04,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 541 transitions, 7575 flow [2024-06-21 20:41:04,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 20:41:04,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 20:41:04,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 169 transitions. [2024-06-21 20:41:04,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37723214285714285 [2024-06-21 20:41:04,023 INFO L175 Difference]: Start difference. First operand has 448 places, 487 transitions, 5749 flow. Second operand 14 states and 169 transitions. [2024-06-21 20:41:04,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 541 transitions, 7575 flow [2024-06-21 20:41:04,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 541 transitions, 7334 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 20:41:04,823 INFO L231 Difference]: Finished difference. Result has 459 places, 506 transitions, 6129 flow [2024-06-21 20:41:04,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=5510, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6129, PETRI_PLACES=459, PETRI_TRANSITIONS=506} [2024-06-21 20:41:04,824 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 428 predicate places. [2024-06-21 20:41:04,824 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 506 transitions, 6129 flow [2024-06-21 20:41:04,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:04,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:04,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:04,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 20:41:04,824 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:41:04,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:04,824 INFO L85 PathProgramCache]: Analyzing trace with hash -2048554156, now seen corresponding path program 11 times [2024-06-21 20:41:04,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:04,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851008103] [2024-06-21 20:41:04,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:04,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:04,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:06,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:06,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:06,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851008103] [2024-06-21 20:41:06,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851008103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:06,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:06,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:41:06,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7629059] [2024-06-21 20:41:06,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:06,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:41:06,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:06,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:41:06,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:41:06,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:41:06,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 506 transitions, 6129 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:06,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:06,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:41:06,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:06,878 INFO L124 PetriNetUnfolderBase]: 1234/2151 cut-off events. [2024-06-21 20:41:06,878 INFO L125 PetriNetUnfolderBase]: For 298672/298672 co-relation queries the response was YES. [2024-06-21 20:41:06,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16231 conditions, 2151 events. 1234/2151 cut-off events. For 298672/298672 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 12639 event pairs, 78 based on Foata normal form. 4/2154 useless extension candidates. Maximal degree in co-relation 16045. Up to 1208 conditions per place. [2024-06-21 20:41:06,910 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 353 selfloop transitions, 186 changer transitions 0/541 dead transitions. [2024-06-21 20:41:06,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 541 transitions, 8011 flow [2024-06-21 20:41:06,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:41:06,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:41:06,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 170 transitions. [2024-06-21 20:41:06,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40865384615384615 [2024-06-21 20:41:06,912 INFO L175 Difference]: Start difference. First operand has 459 places, 506 transitions, 6129 flow. Second operand 13 states and 170 transitions. [2024-06-21 20:41:06,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 541 transitions, 8011 flow [2024-06-21 20:41:08,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 541 transitions, 7836 flow, removed 75 selfloop flow, removed 4 redundant places. [2024-06-21 20:41:08,034 INFO L231 Difference]: Finished difference. Result has 468 places, 514 transitions, 6777 flow [2024-06-21 20:41:08,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=5990, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6777, PETRI_PLACES=468, PETRI_TRANSITIONS=514} [2024-06-21 20:41:08,035 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 437 predicate places. [2024-06-21 20:41:08,035 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 514 transitions, 6777 flow [2024-06-21 20:41:08,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:08,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:08,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:08,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 20:41:08,036 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:41:08,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:08,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1846980810, now seen corresponding path program 4 times [2024-06-21 20:41:08,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:08,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633857102] [2024-06-21 20:41:08,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:08,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:08,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:09,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:09,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:09,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633857102] [2024-06-21 20:41:09,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633857102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:09,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:09,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:41:09,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834197716] [2024-06-21 20:41:09,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:09,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:41:09,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:09,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:41:09,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:41:09,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:41:09,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 514 transitions, 6777 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:09,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:09,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:41:09,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:10,142 INFO L124 PetriNetUnfolderBase]: 1245/2172 cut-off events. [2024-06-21 20:41:10,142 INFO L125 PetriNetUnfolderBase]: For 300815/300815 co-relation queries the response was YES. [2024-06-21 20:41:10,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16890 conditions, 2172 events. 1245/2172 cut-off events. For 300815/300815 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 12732 event pairs, 76 based on Foata normal form. 2/2173 useless extension candidates. Maximal degree in co-relation 16702. Up to 1555 conditions per place. [2024-06-21 20:41:10,173 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 377 selfloop transitions, 157 changer transitions 0/536 dead transitions. [2024-06-21 20:41:10,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 536 transitions, 8209 flow [2024-06-21 20:41:10,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:41:10,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:41:10,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 139 transitions. [2024-06-21 20:41:10,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39488636363636365 [2024-06-21 20:41:10,174 INFO L175 Difference]: Start difference. First operand has 468 places, 514 transitions, 6777 flow. Second operand 11 states and 139 transitions. [2024-06-21 20:41:10,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 536 transitions, 8209 flow [2024-06-21 20:41:11,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 536 transitions, 7767 flow, removed 100 selfloop flow, removed 10 redundant places. [2024-06-21 20:41:11,342 INFO L231 Difference]: Finished difference. Result has 469 places, 516 transitions, 6683 flow [2024-06-21 20:41:11,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6335, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6683, PETRI_PLACES=469, PETRI_TRANSITIONS=516} [2024-06-21 20:41:11,343 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 438 predicate places. [2024-06-21 20:41:11,343 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 516 transitions, 6683 flow [2024-06-21 20:41:11,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:11,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:11,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:11,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-21 20:41:11,343 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:41:11,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:11,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1854399420, now seen corresponding path program 5 times [2024-06-21 20:41:11,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:11,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874546803] [2024-06-21 20:41:11,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:11,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:11,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:12,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:12,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:12,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874546803] [2024-06-21 20:41:12,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874546803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:12,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:12,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:41:12,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325806002] [2024-06-21 20:41:12,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:12,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:41:12,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:12,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:41:12,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:41:12,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:41:12,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 516 transitions, 6683 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:12,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:12,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:41:12,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:13,092 INFO L124 PetriNetUnfolderBase]: 1242/2167 cut-off events. [2024-06-21 20:41:13,092 INFO L125 PetriNetUnfolderBase]: For 279297/279297 co-relation queries the response was YES. [2024-06-21 20:41:13,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16543 conditions, 2167 events. 1242/2167 cut-off events. For 279297/279297 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 12752 event pairs, 92 based on Foata normal form. 2/2168 useless extension candidates. Maximal degree in co-relation 16353. Up to 1628 conditions per place. [2024-06-21 20:41:13,122 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 392 selfloop transitions, 142 changer transitions 0/536 dead transitions. [2024-06-21 20:41:13,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 536 transitions, 7807 flow [2024-06-21 20:41:13,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:41:13,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:41:13,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 139 transitions. [2024-06-21 20:41:13,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39488636363636365 [2024-06-21 20:41:13,124 INFO L175 Difference]: Start difference. First operand has 469 places, 516 transitions, 6683 flow. Second operand 11 states and 139 transitions. [2024-06-21 20:41:13,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 536 transitions, 7807 flow [2024-06-21 20:41:14,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 536 transitions, 7621 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 20:41:14,422 INFO L231 Difference]: Finished difference. Result has 474 places, 516 transitions, 6787 flow [2024-06-21 20:41:14,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6497, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6787, PETRI_PLACES=474, PETRI_TRANSITIONS=516} [2024-06-21 20:41:14,422 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 443 predicate places. [2024-06-21 20:41:14,422 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 516 transitions, 6787 flow [2024-06-21 20:41:14,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:14,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:14,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:14,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-21 20:41:14,423 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:41:14,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:14,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1854614746, now seen corresponding path program 12 times [2024-06-21 20:41:14,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:14,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917060224] [2024-06-21 20:41:14,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:14,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:14,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:15,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:15,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:15,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917060224] [2024-06-21 20:41:15,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917060224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:15,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:15,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:41:15,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139679883] [2024-06-21 20:41:15,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:15,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:41:15,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:15,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:41:15,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:41:15,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:41:15,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 516 transitions, 6787 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:15,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:15,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:41:15,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:16,515 INFO L124 PetriNetUnfolderBase]: 1256/2191 cut-off events. [2024-06-21 20:41:16,515 INFO L125 PetriNetUnfolderBase]: For 286347/286347 co-relation queries the response was YES. [2024-06-21 20:41:16,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16751 conditions, 2191 events. 1256/2191 cut-off events. For 286347/286347 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 12961 event pairs, 93 based on Foata normal form. 4/2194 useless extension candidates. Maximal degree in co-relation 16559. Up to 1254 conditions per place. [2024-06-21 20:41:16,546 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 351 selfloop transitions, 194 changer transitions 0/547 dead transitions. [2024-06-21 20:41:16,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 547 transitions, 8120 flow [2024-06-21 20:41:16,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:41:16,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:41:16,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 165 transitions. [2024-06-21 20:41:16,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39663461538461536 [2024-06-21 20:41:16,547 INFO L175 Difference]: Start difference. First operand has 474 places, 516 transitions, 6787 flow. Second operand 13 states and 165 transitions. [2024-06-21 20:41:16,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 547 transitions, 8120 flow [2024-06-21 20:41:17,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 547 transitions, 7780 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 20:41:17,809 INFO L231 Difference]: Finished difference. Result has 477 places, 522 transitions, 7009 flow [2024-06-21 20:41:17,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6447, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7009, PETRI_PLACES=477, PETRI_TRANSITIONS=522} [2024-06-21 20:41:17,809 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 446 predicate places. [2024-06-21 20:41:17,809 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 522 transitions, 7009 flow [2024-06-21 20:41:17,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:17,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:17,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:17,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-21 20:41:17,810 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:41:17,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:17,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1854614901, now seen corresponding path program 9 times [2024-06-21 20:41:17,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:17,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666308647] [2024-06-21 20:41:17,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:17,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:17,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:18,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:18,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:18,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666308647] [2024-06-21 20:41:18,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666308647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:18,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:18,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:41:18,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859449934] [2024-06-21 20:41:18,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:18,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:41:18,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:18,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:41:18,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:41:19,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:41:19,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 522 transitions, 7009 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:19,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:19,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:41:19,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:19,845 INFO L124 PetriNetUnfolderBase]: 1280/2243 cut-off events. [2024-06-21 20:41:19,845 INFO L125 PetriNetUnfolderBase]: For 394992/394992 co-relation queries the response was YES. [2024-06-21 20:41:19,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17313 conditions, 2243 events. 1280/2243 cut-off events. For 394992/394992 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 13327 event pairs, 91 based on Foata normal form. 14/2256 useless extension candidates. Maximal degree in co-relation 17120. Up to 1246 conditions per place. [2024-06-21 20:41:19,877 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 351 selfloop transitions, 172 changer transitions 26/551 dead transitions. [2024-06-21 20:41:19,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 551 transitions, 8355 flow [2024-06-21 20:41:19,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:41:19,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:41:19,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 159 transitions. [2024-06-21 20:41:19,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4140625 [2024-06-21 20:41:19,878 INFO L175 Difference]: Start difference. First operand has 477 places, 522 transitions, 7009 flow. Second operand 12 states and 159 transitions. [2024-06-21 20:41:19,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 551 transitions, 8355 flow [2024-06-21 20:41:21,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 551 transitions, 7780 flow, removed 97 selfloop flow, removed 10 redundant places. [2024-06-21 20:41:21,207 INFO L231 Difference]: Finished difference. Result has 479 places, 504 transitions, 6618 flow [2024-06-21 20:41:21,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6434, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6618, PETRI_PLACES=479, PETRI_TRANSITIONS=504} [2024-06-21 20:41:21,208 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 448 predicate places. [2024-06-21 20:41:21,208 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 504 transitions, 6618 flow [2024-06-21 20:41:21,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:21,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:21,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:21,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-21 20:41:21,209 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:41:21,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:21,209 INFO L85 PathProgramCache]: Analyzing trace with hash -2048554311, now seen corresponding path program 10 times [2024-06-21 20:41:21,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:21,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186271078] [2024-06-21 20:41:21,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:21,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:21,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:22,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:22,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:22,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186271078] [2024-06-21 20:41:22,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186271078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:22,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:22,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:41:22,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075892683] [2024-06-21 20:41:22,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:22,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:41:22,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:22,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:41:22,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:41:22,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:41:22,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 504 transitions, 6618 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:22,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:22,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:41:22,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:23,413 INFO L124 PetriNetUnfolderBase]: 1212/2151 cut-off events. [2024-06-21 20:41:23,413 INFO L125 PetriNetUnfolderBase]: For 386488/386488 co-relation queries the response was YES. [2024-06-21 20:41:23,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15789 conditions, 2151 events. 1212/2151 cut-off events. For 386488/386488 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 12823 event pairs, 91 based on Foata normal form. 18/2168 useless extension candidates. Maximal degree in co-relation 15595. Up to 1178 conditions per place. [2024-06-21 20:41:23,448 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 346 selfloop transitions, 159 changer transitions 27/534 dead transitions. [2024-06-21 20:41:23,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 534 transitions, 7936 flow [2024-06-21 20:41:23,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:41:23,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:41:23,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 164 transitions. [2024-06-21 20:41:23,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4270833333333333 [2024-06-21 20:41:23,450 INFO L175 Difference]: Start difference. First operand has 479 places, 504 transitions, 6618 flow. Second operand 12 states and 164 transitions. [2024-06-21 20:41:23,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 534 transitions, 7936 flow [2024-06-21 20:41:24,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 534 transitions, 7345 flow, removed 94 selfloop flow, removed 13 redundant places. [2024-06-21 20:41:24,832 INFO L231 Difference]: Finished difference. Result has 478 places, 485 transitions, 6195 flow [2024-06-21 20:41:24,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6027, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6195, PETRI_PLACES=478, PETRI_TRANSITIONS=485} [2024-06-21 20:41:24,832 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 447 predicate places. [2024-06-21 20:41:24,832 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 485 transitions, 6195 flow [2024-06-21 20:41:24,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:24,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:24,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:24,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-21 20:41:24,833 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:41:24,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:24,833 INFO L85 PathProgramCache]: Analyzing trace with hash -2054064561, now seen corresponding path program 11 times [2024-06-21 20:41:24,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:24,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047955413] [2024-06-21 20:41:24,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:24,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:24,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:25,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:25,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:25,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047955413] [2024-06-21 20:41:25,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047955413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:25,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:25,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:41:25,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266694110] [2024-06-21 20:41:25,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:25,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:41:25,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:25,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:41:25,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:41:25,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:41:25,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 485 transitions, 6195 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:25,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:25,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:41:25,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:26,661 INFO L124 PetriNetUnfolderBase]: 1139/2032 cut-off events. [2024-06-21 20:41:26,662 INFO L125 PetriNetUnfolderBase]: For 251682/251682 co-relation queries the response was YES. [2024-06-21 20:41:26,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15112 conditions, 2032 events. 1139/2032 cut-off events. For 251682/251682 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 12098 event pairs, 112 based on Foata normal form. 2/2033 useless extension candidates. Maximal degree in co-relation 14917. Up to 1590 conditions per place. [2024-06-21 20:41:26,690 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 362 selfloop transitions, 142 changer transitions 0/506 dead transitions. [2024-06-21 20:41:26,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 506 transitions, 7643 flow [2024-06-21 20:41:26,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:41:26,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:41:26,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 145 transitions. [2024-06-21 20:41:26,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3776041666666667 [2024-06-21 20:41:26,691 INFO L175 Difference]: Start difference. First operand has 478 places, 485 transitions, 6195 flow. Second operand 12 states and 145 transitions. [2024-06-21 20:41:26,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 506 transitions, 7643 flow [2024-06-21 20:41:27,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 506 transitions, 7264 flow, removed 27 selfloop flow, removed 13 redundant places. [2024-06-21 20:41:27,928 INFO L231 Difference]: Finished difference. Result has 474 places, 487 transitions, 6202 flow [2024-06-21 20:41:27,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=5820, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6202, PETRI_PLACES=474, PETRI_TRANSITIONS=487} [2024-06-21 20:41:27,928 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 443 predicate places. [2024-06-21 20:41:27,928 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 487 transitions, 6202 flow [2024-06-21 20:41:27,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:27,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:27,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:27,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-21 20:41:27,929 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:41:27,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:27,929 INFO L85 PathProgramCache]: Analyzing trace with hash -2054060841, now seen corresponding path program 12 times [2024-06-21 20:41:27,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:27,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107552165] [2024-06-21 20:41:27,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:27,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:27,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:28,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:28,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:28,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107552165] [2024-06-21 20:41:28,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107552165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:28,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:28,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:41:28,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749641229] [2024-06-21 20:41:28,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:28,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:41:28,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:28,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:41:28,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:41:29,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:41:29,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 487 transitions, 6202 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:29,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:29,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:41:29,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:29,775 INFO L124 PetriNetUnfolderBase]: 1136/2027 cut-off events. [2024-06-21 20:41:29,775 INFO L125 PetriNetUnfolderBase]: For 225781/225781 co-relation queries the response was YES. [2024-06-21 20:41:29,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14576 conditions, 2027 events. 1136/2027 cut-off events. For 225781/225781 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 12074 event pairs, 105 based on Foata normal form. 2/2028 useless extension candidates. Maximal degree in co-relation 14382. Up to 1628 conditions per place. [2024-06-21 20:41:29,804 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 363 selfloop transitions, 139 changer transitions 0/504 dead transitions. [2024-06-21 20:41:29,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 504 transitions, 7254 flow [2024-06-21 20:41:29,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:41:29,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:41:29,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 143 transitions. [2024-06-21 20:41:29,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3723958333333333 [2024-06-21 20:41:29,806 INFO L175 Difference]: Start difference. First operand has 474 places, 487 transitions, 6202 flow. Second operand 12 states and 143 transitions. [2024-06-21 20:41:29,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 504 transitions, 7254 flow [2024-06-21 20:41:30,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 504 transitions, 6990 flow, removed 41 selfloop flow, removed 8 redundant places. [2024-06-21 20:41:30,981 INFO L231 Difference]: Finished difference. Result has 478 places, 487 transitions, 6221 flow [2024-06-21 20:41:30,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=5938, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6221, PETRI_PLACES=478, PETRI_TRANSITIONS=487} [2024-06-21 20:41:30,982 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 447 predicate places. [2024-06-21 20:41:30,982 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 487 transitions, 6221 flow [2024-06-21 20:41:30,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:30,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:30,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:30,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-21 20:41:30,982 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:41:30,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:30,983 INFO L85 PathProgramCache]: Analyzing trace with hash 18436864, now seen corresponding path program 6 times [2024-06-21 20:41:30,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:30,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634851574] [2024-06-21 20:41:30,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:30,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:30,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:32,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:32,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:32,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634851574] [2024-06-21 20:41:32,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634851574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:32,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:32,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:41:32,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465797594] [2024-06-21 20:41:32,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:32,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:41:32,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:32,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:41:32,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:41:32,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:41:32,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 487 transitions, 6221 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:32,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:32,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:41:32,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:32,897 INFO L124 PetriNetUnfolderBase]: 1152/2054 cut-off events. [2024-06-21 20:41:32,897 INFO L125 PetriNetUnfolderBase]: For 226721/226721 co-relation queries the response was YES. [2024-06-21 20:41:32,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14801 conditions, 2054 events. 1152/2054 cut-off events. For 226721/226721 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 12281 event pairs, 85 based on Foata normal form. 2/2055 useless extension candidates. Maximal degree in co-relation 14605. Up to 1510 conditions per place. [2024-06-21 20:41:32,928 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 380 selfloop transitions, 128 changer transitions 0/510 dead transitions. [2024-06-21 20:41:32,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 510 transitions, 7355 flow [2024-06-21 20:41:32,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:41:32,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:41:32,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 139 transitions. [2024-06-21 20:41:32,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39488636363636365 [2024-06-21 20:41:32,929 INFO L175 Difference]: Start difference. First operand has 478 places, 487 transitions, 6221 flow. Second operand 11 states and 139 transitions. [2024-06-21 20:41:32,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 510 transitions, 7355 flow [2024-06-21 20:41:34,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 510 transitions, 7059 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-21 20:41:34,097 INFO L231 Difference]: Finished difference. Result has 478 places, 492 transitions, 6256 flow [2024-06-21 20:41:34,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=5925, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6256, PETRI_PLACES=478, PETRI_TRANSITIONS=492} [2024-06-21 20:41:34,098 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 447 predicate places. [2024-06-21 20:41:34,098 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 492 transitions, 6256 flow [2024-06-21 20:41:34,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:34,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:34,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:34,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-21 20:41:34,099 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:41:34,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:34,099 INFO L85 PathProgramCache]: Analyzing trace with hash 18169458, now seen corresponding path program 13 times [2024-06-21 20:41:34,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:34,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685709448] [2024-06-21 20:41:34,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:34,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:34,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:35,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:35,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:35,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685709448] [2024-06-21 20:41:35,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685709448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:35,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:35,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:41:35,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786802161] [2024-06-21 20:41:35,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:35,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:41:35,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:35,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:41:35,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:41:35,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:41:35,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 492 transitions, 6256 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:35,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:35,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:41:35,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:36,626 INFO L124 PetriNetUnfolderBase]: 1173/2090 cut-off events. [2024-06-21 20:41:36,626 INFO L125 PetriNetUnfolderBase]: For 231783/231783 co-relation queries the response was YES. [2024-06-21 20:41:36,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15133 conditions, 2090 events. 1173/2090 cut-off events. For 231783/231783 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 12539 event pairs, 97 based on Foata normal form. 2/2091 useless extension candidates. Maximal degree in co-relation 14936. Up to 1202 conditions per place. [2024-06-21 20:41:36,654 INFO L140 encePairwiseOnDemand]: 18/32 looper letters, 353 selfloop transitions, 166 changer transitions 0/521 dead transitions. [2024-06-21 20:41:36,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 521 transitions, 7528 flow [2024-06-21 20:41:36,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:41:36,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:41:36,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 156 transitions. [2024-06-21 20:41:36,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-21 20:41:36,655 INFO L175 Difference]: Start difference. First operand has 478 places, 492 transitions, 6256 flow. Second operand 12 states and 156 transitions. [2024-06-21 20:41:36,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 521 transitions, 7528 flow [2024-06-21 20:41:37,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 521 transitions, 7287 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 20:41:37,799 INFO L231 Difference]: Finished difference. Result has 485 places, 500 transitions, 6576 flow [2024-06-21 20:41:37,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6015, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6576, PETRI_PLACES=485, PETRI_TRANSITIONS=500} [2024-06-21 20:41:37,800 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 454 predicate places. [2024-06-21 20:41:37,800 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 500 transitions, 6576 flow [2024-06-21 20:41:37,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:37,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:37,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:37,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-21 20:41:37,800 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:41:37,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:37,800 INFO L85 PathProgramCache]: Analyzing trace with hash -182911856, now seen corresponding path program 7 times [2024-06-21 20:41:37,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:37,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566844470] [2024-06-21 20:41:37,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:37,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:37,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:38,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:38,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:38,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566844470] [2024-06-21 20:41:38,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566844470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:38,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:38,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:41:38,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451108752] [2024-06-21 20:41:38,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:38,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:41:38,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:38,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:41:38,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:41:38,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:41:38,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 500 transitions, 6576 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:38,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:38,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:41:38,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:39,520 INFO L124 PetriNetUnfolderBase]: 1177/2097 cut-off events. [2024-06-21 20:41:39,520 INFO L125 PetriNetUnfolderBase]: For 236140/236140 co-relation queries the response was YES. [2024-06-21 20:41:39,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15413 conditions, 2097 events. 1177/2097 cut-off events. For 236140/236140 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 12626 event pairs, 81 based on Foata normal form. 2/2098 useless extension candidates. Maximal degree in co-relation 15214. Up to 1553 conditions per place. [2024-06-21 20:41:39,550 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 385 selfloop transitions, 132 changer transitions 0/519 dead transitions. [2024-06-21 20:41:39,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 519 transitions, 7678 flow [2024-06-21 20:41:39,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:41:39,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:41:39,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 138 transitions. [2024-06-21 20:41:39,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39204545454545453 [2024-06-21 20:41:39,551 INFO L175 Difference]: Start difference. First operand has 485 places, 500 transitions, 6576 flow. Second operand 11 states and 138 transitions. [2024-06-21 20:41:39,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 519 transitions, 7678 flow [2024-06-21 20:41:40,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 519 transitions, 7310 flow, removed 62 selfloop flow, removed 7 redundant places. [2024-06-21 20:41:40,677 INFO L231 Difference]: Finished difference. Result has 489 places, 501 transitions, 6497 flow [2024-06-21 20:41:40,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6208, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6497, PETRI_PLACES=489, PETRI_TRANSITIONS=501} [2024-06-21 20:41:40,678 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 458 predicate places. [2024-06-21 20:41:40,678 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 501 transitions, 6497 flow [2024-06-21 20:41:40,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:40,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:40,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:40,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-21 20:41:40,679 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:41:40,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:40,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1700501488, now seen corresponding path program 8 times [2024-06-21 20:41:40,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:40,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775528803] [2024-06-21 20:41:40,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:40,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:40,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:41,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:41,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:41,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775528803] [2024-06-21 20:41:41,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775528803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:41,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:41,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:41:41,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784111076] [2024-06-21 20:41:41,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:41,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:41:41,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:41,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:41:41,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:41:41,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:41:41,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 501 transitions, 6497 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:41,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:41,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:41:41,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:42,595 INFO L124 PetriNetUnfolderBase]: 1205/2145 cut-off events. [2024-06-21 20:41:42,595 INFO L125 PetriNetUnfolderBase]: For 237380/237380 co-relation queries the response was YES. [2024-06-21 20:41:42,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15523 conditions, 2145 events. 1205/2145 cut-off events. For 237380/237380 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 12949 event pairs, 82 based on Foata normal form. 2/2146 useless extension candidates. Maximal degree in co-relation 15323. Up to 1585 conditions per place. [2024-06-21 20:41:42,626 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 386 selfloop transitions, 140 changer transitions 0/528 dead transitions. [2024-06-21 20:41:42,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 528 transitions, 7747 flow [2024-06-21 20:41:42,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:41:42,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:41:42,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 138 transitions. [2024-06-21 20:41:42,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39204545454545453 [2024-06-21 20:41:42,627 INFO L175 Difference]: Start difference. First operand has 489 places, 501 transitions, 6497 flow. Second operand 11 states and 138 transitions. [2024-06-21 20:41:42,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 528 transitions, 7747 flow [2024-06-21 20:41:43,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 528 transitions, 7442 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-21 20:41:43,797 INFO L231 Difference]: Finished difference. Result has 491 places, 510 transitions, 6627 flow [2024-06-21 20:41:43,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6208, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6627, PETRI_PLACES=491, PETRI_TRANSITIONS=510} [2024-06-21 20:41:43,798 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 460 predicate places. [2024-06-21 20:41:43,798 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 510 transitions, 6627 flow [2024-06-21 20:41:43,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:43,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:43,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:43,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-21 20:41:43,799 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:41:43,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:43,799 INFO L85 PathProgramCache]: Analyzing trace with hash 11027554, now seen corresponding path program 9 times [2024-06-21 20:41:43,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:43,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036085264] [2024-06-21 20:41:43,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:43,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:43,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:44,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:44,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:44,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036085264] [2024-06-21 20:41:44,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036085264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:44,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:44,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:41:44,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504159461] [2024-06-21 20:41:44,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:44,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:41:44,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:44,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:41:44,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:41:44,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:41:44,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 510 transitions, 6627 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:44,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:44,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:41:44,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:45,530 INFO L124 PetriNetUnfolderBase]: 1209/2153 cut-off events. [2024-06-21 20:41:45,530 INFO L125 PetriNetUnfolderBase]: For 241131/241131 co-relation queries the response was YES. [2024-06-21 20:41:45,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15572 conditions, 2153 events. 1209/2153 cut-off events. For 241131/241131 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 13027 event pairs, 87 based on Foata normal form. 2/2154 useless extension candidates. Maximal degree in co-relation 15371. Up to 1593 conditions per place. [2024-06-21 20:41:45,562 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 394 selfloop transitions, 134 changer transitions 0/530 dead transitions. [2024-06-21 20:41:45,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 530 transitions, 7759 flow [2024-06-21 20:41:45,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:41:45,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:41:45,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 141 transitions. [2024-06-21 20:41:45,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005681818181818 [2024-06-21 20:41:45,564 INFO L175 Difference]: Start difference. First operand has 491 places, 510 transitions, 6627 flow. Second operand 11 states and 141 transitions. [2024-06-21 20:41:45,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 530 transitions, 7759 flow [2024-06-21 20:41:46,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 530 transitions, 7490 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 20:41:46,826 INFO L231 Difference]: Finished difference. Result has 496 places, 511 transitions, 6655 flow [2024-06-21 20:41:46,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6358, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6655, PETRI_PLACES=496, PETRI_TRANSITIONS=511} [2024-06-21 20:41:46,826 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 465 predicate places. [2024-06-21 20:41:46,827 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 511 transitions, 6655 flow [2024-06-21 20:41:46,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:46,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:46,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:46,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-21 20:41:46,827 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:41:46,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:46,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1700492188, now seen corresponding path program 10 times [2024-06-21 20:41:46,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:46,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194799395] [2024-06-21 20:41:46,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:46,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:46,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:48,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:48,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:48,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194799395] [2024-06-21 20:41:48,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194799395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:48,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:48,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:41:48,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143353733] [2024-06-21 20:41:48,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:48,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:41:48,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:48,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:41:48,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:41:48,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:41:48,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 511 transitions, 6655 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:48,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:48,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:41:48,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:49,265 INFO L124 PetriNetUnfolderBase]: 1220/2174 cut-off events. [2024-06-21 20:41:49,265 INFO L125 PetriNetUnfolderBase]: For 267239/267239 co-relation queries the response was YES. [2024-06-21 20:41:49,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16019 conditions, 2174 events. 1220/2174 cut-off events. For 267239/267239 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 13180 event pairs, 86 based on Foata normal form. 2/2175 useless extension candidates. Maximal degree in co-relation 15817. Up to 1562 conditions per place. [2024-06-21 20:41:49,292 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 384 selfloop transitions, 146 changer transitions 0/532 dead transitions. [2024-06-21 20:41:49,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 532 transitions, 8119 flow [2024-06-21 20:41:49,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:41:49,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:41:49,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 140 transitions. [2024-06-21 20:41:49,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-06-21 20:41:49,293 INFO L175 Difference]: Start difference. First operand has 496 places, 511 transitions, 6655 flow. Second operand 11 states and 140 transitions. [2024-06-21 20:41:49,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 532 transitions, 8119 flow [2024-06-21 20:41:50,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 532 transitions, 7822 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-21 20:41:50,683 INFO L231 Difference]: Finished difference. Result has 498 places, 513 transitions, 6704 flow [2024-06-21 20:41:50,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6358, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6704, PETRI_PLACES=498, PETRI_TRANSITIONS=513} [2024-06-21 20:41:50,684 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 467 predicate places. [2024-06-21 20:41:50,684 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 513 transitions, 6704 flow [2024-06-21 20:41:50,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:50,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:50,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:50,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-21 20:41:50,685 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:41:50,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:50,685 INFO L85 PathProgramCache]: Analyzing trace with hash -182919792, now seen corresponding path program 14 times [2024-06-21 20:41:50,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:50,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889959537] [2024-06-21 20:41:50,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:50,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:50,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:51,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:51,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:51,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889959537] [2024-06-21 20:41:51,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889959537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:51,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:51,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:41:51,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056160390] [2024-06-21 20:41:51,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:51,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:41:51,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:51,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:41:51,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:41:51,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:41:51,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 513 transitions, 6704 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:51,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:51,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:41:51,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:52,768 INFO L124 PetriNetUnfolderBase]: 1238/2205 cut-off events. [2024-06-21 20:41:52,768 INFO L125 PetriNetUnfolderBase]: For 273145/273145 co-relation queries the response was YES. [2024-06-21 20:41:52,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16353 conditions, 2205 events. 1238/2205 cut-off events. For 273145/273145 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 13422 event pairs, 92 based on Foata normal form. 2/2206 useless extension candidates. Maximal degree in co-relation 16150. Up to 1310 conditions per place. [2024-06-21 20:41:52,801 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 367 selfloop transitions, 171 changer transitions 0/540 dead transitions. [2024-06-21 20:41:52,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 540 transitions, 8008 flow [2024-06-21 20:41:52,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:41:52,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:41:52,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 154 transitions. [2024-06-21 20:41:52,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010416666666667 [2024-06-21 20:41:52,802 INFO L175 Difference]: Start difference. First operand has 498 places, 513 transitions, 6704 flow. Second operand 12 states and 154 transitions. [2024-06-21 20:41:52,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 540 transitions, 8008 flow [2024-06-21 20:41:54,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 540 transitions, 7804 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 20:41:54,209 INFO L231 Difference]: Finished difference. Result has 503 places, 519 transitions, 7012 flow [2024-06-21 20:41:54,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6500, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7012, PETRI_PLACES=503, PETRI_TRANSITIONS=519} [2024-06-21 20:41:54,210 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 472 predicate places. [2024-06-21 20:41:54,210 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 519 transitions, 7012 flow [2024-06-21 20:41:54,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:54,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:54,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:54,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-21 20:41:54,210 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:41:54,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:54,211 INFO L85 PathProgramCache]: Analyzing trace with hash -188489717, now seen corresponding path program 13 times [2024-06-21 20:41:54,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:54,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978879679] [2024-06-21 20:41:54,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:54,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:54,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:55,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:55,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:55,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978879679] [2024-06-21 20:41:55,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978879679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:55,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:55,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:41:55,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827429556] [2024-06-21 20:41:55,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:55,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:41:55,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:55,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:41:55,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:41:55,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:41:55,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 519 transitions, 7012 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:55,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:55,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:41:55,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:56,111 INFO L124 PetriNetUnfolderBase]: 1268/2267 cut-off events. [2024-06-21 20:41:56,111 INFO L125 PetriNetUnfolderBase]: For 435954/435954 co-relation queries the response was YES. [2024-06-21 20:41:56,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17330 conditions, 2267 events. 1268/2267 cut-off events. For 435954/435954 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 13883 event pairs, 92 based on Foata normal form. 16/2282 useless extension candidates. Maximal degree in co-relation 17125. Up to 1307 conditions per place. [2024-06-21 20:41:56,146 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 353 selfloop transitions, 180 changer transitions 14/549 dead transitions. [2024-06-21 20:41:56,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 549 transitions, 8482 flow [2024-06-21 20:41:56,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:41:56,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:41:56,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 161 transitions. [2024-06-21 20:41:56,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4192708333333333 [2024-06-21 20:41:56,147 INFO L175 Difference]: Start difference. First operand has 503 places, 519 transitions, 7012 flow. Second operand 12 states and 161 transitions. [2024-06-21 20:41:56,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 549 transitions, 8482 flow [2024-06-21 20:41:57,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 549 transitions, 8054 flow, removed 56 selfloop flow, removed 8 redundant places. [2024-06-21 20:41:57,673 INFO L231 Difference]: Finished difference. Result has 508 places, 515 transitions, 6950 flow [2024-06-21 20:41:57,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6584, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6950, PETRI_PLACES=508, PETRI_TRANSITIONS=515} [2024-06-21 20:41:57,674 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 477 predicate places. [2024-06-21 20:41:57,674 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 515 transitions, 6950 flow [2024-06-21 20:41:57,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:57,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:41:57,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:41:57,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-21 20:41:57,674 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:41:57,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:41:57,675 INFO L85 PathProgramCache]: Analyzing trace with hash 11019618, now seen corresponding path program 15 times [2024-06-21 20:41:57,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:41:57,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048318842] [2024-06-21 20:41:57,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:41:57,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:41:57,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:41:58,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:41:58,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:41:58,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048318842] [2024-06-21 20:41:58,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048318842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:41:58,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:41:58,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:41:58,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932386865] [2024-06-21 20:41:58,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:41:58,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:41:58,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:41:58,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:41:58,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:41:58,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:41:58,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 515 transitions, 6950 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:41:58,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:41:58,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:41:58,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:41:59,730 INFO L124 PetriNetUnfolderBase]: 1244/2219 cut-off events. [2024-06-21 20:41:59,731 INFO L125 PetriNetUnfolderBase]: For 285009/285009 co-relation queries the response was YES. [2024-06-21 20:41:59,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16927 conditions, 2219 events. 1244/2219 cut-off events. For 285009/285009 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 13587 event pairs, 98 based on Foata normal form. 2/2220 useless extension candidates. Maximal degree in co-relation 16720. Up to 1328 conditions per place. [2024-06-21 20:41:59,765 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 377 selfloop transitions, 164 changer transitions 0/543 dead transitions. [2024-06-21 20:41:59,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 543 transitions, 8280 flow [2024-06-21 20:41:59,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:41:59,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:41:59,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 158 transitions. [2024-06-21 20:41:59,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4114583333333333 [2024-06-21 20:41:59,766 INFO L175 Difference]: Start difference. First operand has 508 places, 515 transitions, 6950 flow. Second operand 12 states and 158 transitions. [2024-06-21 20:41:59,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 543 transitions, 8280 flow [2024-06-21 20:42:01,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 543 transitions, 7859 flow, removed 24 selfloop flow, removed 12 redundant places. [2024-06-21 20:42:01,036 INFO L231 Difference]: Finished difference. Result has 508 places, 521 transitions, 7043 flow [2024-06-21 20:42:01,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6537, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7043, PETRI_PLACES=508, PETRI_TRANSITIONS=521} [2024-06-21 20:42:01,036 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 477 predicate places. [2024-06-21 20:42:01,036 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 521 transitions, 7043 flow [2024-06-21 20:42:01,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:01,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:01,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:01,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-21 20:42:01,037 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:42:01,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:01,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1764990860, now seen corresponding path program 16 times [2024-06-21 20:42:01,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:01,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366581514] [2024-06-21 20:42:01,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:01,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:01,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:02,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:02,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:02,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366581514] [2024-06-21 20:42:02,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366581514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:02,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:02,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:42:02,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235290872] [2024-06-21 20:42:02,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:02,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:42:02,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:02,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:42:02,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:42:02,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:42:02,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 521 transitions, 7043 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:02,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:02,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:42:02,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:03,126 INFO L124 PetriNetUnfolderBase]: 1250/2229 cut-off events. [2024-06-21 20:42:03,126 INFO L125 PetriNetUnfolderBase]: For 287245/287245 co-relation queries the response was YES. [2024-06-21 20:42:03,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17006 conditions, 2229 events. 1250/2229 cut-off events. For 287245/287245 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 13668 event pairs, 98 based on Foata normal form. 2/2230 useless extension candidates. Maximal degree in co-relation 16799. Up to 1338 conditions per place. [2024-06-21 20:42:03,161 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 377 selfloop transitions, 166 changer transitions 0/545 dead transitions. [2024-06-21 20:42:03,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 545 transitions, 8329 flow [2024-06-21 20:42:03,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:42:03,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:42:03,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 157 transitions. [2024-06-21 20:42:03,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4088541666666667 [2024-06-21 20:42:03,162 INFO L175 Difference]: Start difference. First operand has 508 places, 521 transitions, 7043 flow. Second operand 12 states and 157 transitions. [2024-06-21 20:42:03,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 545 transitions, 8329 flow [2024-06-21 20:42:04,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 545 transitions, 7870 flow, removed 60 selfloop flow, removed 9 redundant places. [2024-06-21 20:42:04,568 INFO L231 Difference]: Finished difference. Result has 511 places, 523 transitions, 7054 flow [2024-06-21 20:42:04,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6584, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7054, PETRI_PLACES=511, PETRI_TRANSITIONS=523} [2024-06-21 20:42:04,568 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 480 predicate places. [2024-06-21 20:42:04,568 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 523 transitions, 7054 flow [2024-06-21 20:42:04,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:04,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:04,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:04,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-21 20:42:04,569 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:42:04,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:04,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1958936005, now seen corresponding path program 14 times [2024-06-21 20:42:04,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:04,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404929682] [2024-06-21 20:42:04,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:04,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:04,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:05,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:05,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:05,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404929682] [2024-06-21 20:42:05,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404929682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:05,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:05,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:42:05,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987562691] [2024-06-21 20:42:05,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:05,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:42:05,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:05,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:42:05,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:42:05,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:42:05,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 523 transitions, 7054 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:05,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:05,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:42:05,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:06,485 INFO L124 PetriNetUnfolderBase]: 1254/2237 cut-off events. [2024-06-21 20:42:06,486 INFO L125 PetriNetUnfolderBase]: For 288106/288106 co-relation queries the response was YES. [2024-06-21 20:42:06,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16990 conditions, 2237 events. 1254/2237 cut-off events. For 288106/288106 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 13699 event pairs, 140 based on Foata normal form. 2/2238 useless extension candidates. Maximal degree in co-relation 16782. Up to 1865 conditions per place. [2024-06-21 20:42:06,518 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 423 selfloop transitions, 114 changer transitions 0/539 dead transitions. [2024-06-21 20:42:06,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 539 transitions, 8220 flow [2024-06-21 20:42:06,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:42:06,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:42:06,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 142 transitions. [2024-06-21 20:42:06,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3697916666666667 [2024-06-21 20:42:06,519 INFO L175 Difference]: Start difference. First operand has 511 places, 523 transitions, 7054 flow. Second operand 12 states and 142 transitions. [2024-06-21 20:42:06,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 539 transitions, 8220 flow [2024-06-21 20:42:07,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 539 transitions, 7742 flow, removed 62 selfloop flow, removed 11 redundant places. [2024-06-21 20:42:07,939 INFO L231 Difference]: Finished difference. Result has 512 places, 524 transitions, 6860 flow [2024-06-21 20:42:07,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6576, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6860, PETRI_PLACES=512, PETRI_TRANSITIONS=524} [2024-06-21 20:42:07,940 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 481 predicate places. [2024-06-21 20:42:07,940 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 524 transitions, 6860 flow [2024-06-21 20:42:07,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:07,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:07,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:07,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-21 20:42:07,941 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:42:07,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:07,941 INFO L85 PathProgramCache]: Analyzing trace with hash 469259330, now seen corresponding path program 17 times [2024-06-21 20:42:07,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:07,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920674737] [2024-06-21 20:42:07,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:07,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:07,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:09,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:09,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:09,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920674737] [2024-06-21 20:42:09,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920674737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:09,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:09,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:42:09,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403196221] [2024-06-21 20:42:09,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:09,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:42:09,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:09,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:42:09,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:42:09,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:42:09,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 524 transitions, 6860 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:09,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:09,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:42:09,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:09,997 INFO L124 PetriNetUnfolderBase]: 1260/2247 cut-off events. [2024-06-21 20:42:09,997 INFO L125 PetriNetUnfolderBase]: For 291924/291924 co-relation queries the response was YES. [2024-06-21 20:42:10,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16877 conditions, 2247 events. 1260/2247 cut-off events. For 291924/291924 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 13828 event pairs, 90 based on Foata normal form. 2/2248 useless extension candidates. Maximal degree in co-relation 16668. Up to 1356 conditions per place. [2024-06-21 20:42:10,033 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 376 selfloop transitions, 170 changer transitions 0/548 dead transitions. [2024-06-21 20:42:10,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 548 transitions, 8156 flow [2024-06-21 20:42:10,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:42:10,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:42:10,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 156 transitions. [2024-06-21 20:42:10,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-21 20:42:10,034 INFO L175 Difference]: Start difference. First operand has 512 places, 524 transitions, 6860 flow. Second operand 12 states and 156 transitions. [2024-06-21 20:42:10,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 548 transitions, 8156 flow [2024-06-21 20:42:11,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 548 transitions, 7882 flow, removed 24 selfloop flow, removed 10 redundant places. [2024-06-21 20:42:11,383 INFO L231 Difference]: Finished difference. Result has 514 places, 526 transitions, 7068 flow [2024-06-21 20:42:11,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6586, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7068, PETRI_PLACES=514, PETRI_TRANSITIONS=526} [2024-06-21 20:42:11,384 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 483 predicate places. [2024-06-21 20:42:11,384 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 526 transitions, 7068 flow [2024-06-21 20:42:11,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:11,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:11,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:11,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-21 20:42:11,385 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:42:11,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:11,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1708126279, now seen corresponding path program 15 times [2024-06-21 20:42:11,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:11,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306520008] [2024-06-21 20:42:11,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:11,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:11,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:12,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:12,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:12,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306520008] [2024-06-21 20:42:12,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306520008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:12,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:12,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:42:12,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754025213] [2024-06-21 20:42:12,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:12,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:42:12,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:12,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:42:12,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:42:12,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:42:12,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 526 transitions, 7068 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:12,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:12,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:42:12,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:13,557 INFO L124 PetriNetUnfolderBase]: 1284/2299 cut-off events. [2024-06-21 20:42:13,557 INFO L125 PetriNetUnfolderBase]: For 448216/448216 co-relation queries the response was YES. [2024-06-21 20:42:13,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17491 conditions, 2299 events. 1284/2299 cut-off events. For 448216/448216 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 14165 event pairs, 108 based on Foata normal form. 14/2312 useless extension candidates. Maximal degree in co-relation 17281. Up to 1343 conditions per place. [2024-06-21 20:42:13,593 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 360 selfloop transitions, 171 changer transitions 20/553 dead transitions. [2024-06-21 20:42:13,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 553 transitions, 8442 flow [2024-06-21 20:42:13,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:42:13,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:42:13,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 157 transitions. [2024-06-21 20:42:13,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4088541666666667 [2024-06-21 20:42:13,594 INFO L175 Difference]: Start difference. First operand has 514 places, 526 transitions, 7068 flow. Second operand 12 states and 157 transitions. [2024-06-21 20:42:13,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 553 transitions, 8442 flow [2024-06-21 20:42:14,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 553 transitions, 7958 flow, removed 64 selfloop flow, removed 11 redundant places. [2024-06-21 20:42:14,919 INFO L231 Difference]: Finished difference. Result has 515 places, 514 transitions, 6831 flow [2024-06-21 20:42:14,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6584, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6831, PETRI_PLACES=515, PETRI_TRANSITIONS=514} [2024-06-21 20:42:14,919 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 484 predicate places. [2024-06-21 20:42:14,919 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 514 transitions, 6831 flow [2024-06-21 20:42:14,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:14,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:14,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:14,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-21 20:42:14,920 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:42:14,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:14,920 INFO L85 PathProgramCache]: Analyzing trace with hash 18446164, now seen corresponding path program 11 times [2024-06-21 20:42:14,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:14,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683303961] [2024-06-21 20:42:14,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:14,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:14,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:16,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:16,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:16,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683303961] [2024-06-21 20:42:16,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683303961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:16,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:16,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:42:16,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380400589] [2024-06-21 20:42:16,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:16,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:42:16,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:16,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:42:16,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:42:16,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:42:16,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 514 transitions, 6831 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:16,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:16,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:42:16,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:17,223 INFO L124 PetriNetUnfolderBase]: 1222/2204 cut-off events. [2024-06-21 20:42:17,223 INFO L125 PetriNetUnfolderBase]: For 296893/296893 co-relation queries the response was YES. [2024-06-21 20:42:17,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16625 conditions, 2204 events. 1222/2204 cut-off events. For 296893/296893 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 13665 event pairs, 93 based on Foata normal form. 2/2205 useless extension candidates. Maximal degree in co-relation 16414. Up to 1587 conditions per place. [2024-06-21 20:42:17,251 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 394 selfloop transitions, 137 changer transitions 0/533 dead transitions. [2024-06-21 20:42:17,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 533 transitions, 7967 flow [2024-06-21 20:42:17,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:42:17,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:42:17,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 140 transitions. [2024-06-21 20:42:17,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-06-21 20:42:17,252 INFO L175 Difference]: Start difference. First operand has 515 places, 514 transitions, 6831 flow. Second operand 11 states and 140 transitions. [2024-06-21 20:42:17,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 533 transitions, 7967 flow [2024-06-21 20:42:18,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 533 transitions, 7518 flow, removed 25 selfloop flow, removed 13 redundant places. [2024-06-21 20:42:18,514 INFO L231 Difference]: Finished difference. Result has 513 places, 515 transitions, 6688 flow [2024-06-21 20:42:18,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6382, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6688, PETRI_PLACES=513, PETRI_TRANSITIONS=515} [2024-06-21 20:42:18,514 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 482 predicate places. [2024-06-21 20:42:18,514 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 515 transitions, 6688 flow [2024-06-21 20:42:18,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:18,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:18,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:18,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-21 20:42:18,515 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:42:18,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:18,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1076945110, now seen corresponding path program 12 times [2024-06-21 20:42:18,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:18,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089249567] [2024-06-21 20:42:18,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:18,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:18,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:19,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:19,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:19,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089249567] [2024-06-21 20:42:19,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089249567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:19,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:19,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:42:19,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429488202] [2024-06-21 20:42:19,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:19,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:42:19,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:19,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:42:19,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:42:19,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:42:19,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 515 transitions, 6688 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:19,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:19,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:42:19,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:20,455 INFO L124 PetriNetUnfolderBase]: 1226/2212 cut-off events. [2024-06-21 20:42:20,455 INFO L125 PetriNetUnfolderBase]: For 299477/299477 co-relation queries the response was YES. [2024-06-21 20:42:20,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16481 conditions, 2212 events. 1226/2212 cut-off events. For 299477/299477 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 13712 event pairs, 96 based on Foata normal form. 2/2213 useless extension candidates. Maximal degree in co-relation 16270. Up to 1652 conditions per place. [2024-06-21 20:42:20,488 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 378 selfloop transitions, 153 changer transitions 0/533 dead transitions. [2024-06-21 20:42:20,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 533 transitions, 7824 flow [2024-06-21 20:42:20,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:42:20,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:42:20,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-06-21 20:42:20,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3806818181818182 [2024-06-21 20:42:20,489 INFO L175 Difference]: Start difference. First operand has 513 places, 515 transitions, 6688 flow. Second operand 11 states and 134 transitions. [2024-06-21 20:42:20,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 533 transitions, 7824 flow [2024-06-21 20:42:21,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 533 transitions, 7528 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-21 20:42:21,911 INFO L231 Difference]: Finished difference. Result has 515 places, 516 transitions, 6733 flow [2024-06-21 20:42:21,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6392, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6733, PETRI_PLACES=515, PETRI_TRANSITIONS=516} [2024-06-21 20:42:21,911 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 484 predicate places. [2024-06-21 20:42:21,911 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 516 transitions, 6733 flow [2024-06-21 20:42:21,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:21,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:21,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:21,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-21 20:42:21,912 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:42:21,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:21,912 INFO L85 PathProgramCache]: Analyzing trace with hash 811247830, now seen corresponding path program 13 times [2024-06-21 20:42:21,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:21,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666925342] [2024-06-21 20:42:21,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:21,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:21,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:23,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:23,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:23,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666925342] [2024-06-21 20:42:23,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666925342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:23,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:23,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:42:23,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060617666] [2024-06-21 20:42:23,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:23,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:42:23,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:23,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:42:23,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:42:23,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:42:23,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 516 transitions, 6733 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:23,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:23,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:42:23,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:23,898 INFO L124 PetriNetUnfolderBase]: 1223/2207 cut-off events. [2024-06-21 20:42:23,898 INFO L125 PetriNetUnfolderBase]: For 276108/276108 co-relation queries the response was YES. [2024-06-21 20:42:23,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16148 conditions, 2207 events. 1223/2207 cut-off events. For 276108/276108 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 13688 event pairs, 91 based on Foata normal form. 2/2208 useless extension candidates. Maximal degree in co-relation 15936. Up to 1647 conditions per place. [2024-06-21 20:42:23,932 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 396 selfloop transitions, 136 changer transitions 0/534 dead transitions. [2024-06-21 20:42:23,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 534 transitions, 7847 flow [2024-06-21 20:42:23,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:42:23,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:42:23,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 136 transitions. [2024-06-21 20:42:23,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-06-21 20:42:23,933 INFO L175 Difference]: Start difference. First operand has 515 places, 516 transitions, 6733 flow. Second operand 11 states and 136 transitions. [2024-06-21 20:42:23,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 534 transitions, 7847 flow [2024-06-21 20:42:25,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 534 transitions, 7561 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-21 20:42:25,196 INFO L231 Difference]: Finished difference. Result has 519 places, 516 transitions, 6724 flow [2024-06-21 20:42:25,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6447, PETRI_DIFFERENCE_MINUEND_PLACES=508, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6724, PETRI_PLACES=519, PETRI_TRANSITIONS=516} [2024-06-21 20:42:25,197 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 488 predicate places. [2024-06-21 20:42:25,197 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 516 transitions, 6724 flow [2024-06-21 20:42:25,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:25,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:25,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:25,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-21 20:42:25,197 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:42:25,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:25,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1708126124, now seen corresponding path program 18 times [2024-06-21 20:42:25,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:25,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712445934] [2024-06-21 20:42:25,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:25,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:25,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:26,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:26,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:26,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712445934] [2024-06-21 20:42:26,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712445934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:26,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:26,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:42:26,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112514837] [2024-06-21 20:42:26,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:26,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:42:26,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:26,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:42:26,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:42:26,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:42:26,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 516 transitions, 6724 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:26,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:26,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:42:26,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:27,266 INFO L124 PetriNetUnfolderBase]: 1229/2218 cut-off events. [2024-06-21 20:42:27,266 INFO L125 PetriNetUnfolderBase]: For 282559/282559 co-relation queries the response was YES. [2024-06-21 20:42:27,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16334 conditions, 2218 events. 1229/2218 cut-off events. For 282559/282559 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 13784 event pairs, 105 based on Foata normal form. 2/2219 useless extension candidates. Maximal degree in co-relation 16121. Up to 1364 conditions per place. [2024-06-21 20:42:27,300 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 363 selfloop transitions, 172 changer transitions 0/537 dead transitions. [2024-06-21 20:42:27,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 537 transitions, 7990 flow [2024-06-21 20:42:27,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:42:27,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:42:27,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 148 transitions. [2024-06-21 20:42:27,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3854166666666667 [2024-06-21 20:42:27,301 INFO L175 Difference]: Start difference. First operand has 519 places, 516 transitions, 6724 flow. Second operand 12 states and 148 transitions. [2024-06-21 20:42:27,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 537 transitions, 7990 flow [2024-06-21 20:42:28,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 537 transitions, 7704 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-21 20:42:28,653 INFO L231 Difference]: Finished difference. Result has 521 places, 518 transitions, 6927 flow [2024-06-21 20:42:28,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6438, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6927, PETRI_PLACES=521, PETRI_TRANSITIONS=518} [2024-06-21 20:42:28,654 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 490 predicate places. [2024-06-21 20:42:28,654 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 518 transitions, 6927 flow [2024-06-21 20:42:28,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:28,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:28,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:28,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-21 20:42:28,654 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:42:28,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:28,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1764996440, now seen corresponding path program 19 times [2024-06-21 20:42:28,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:28,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609670550] [2024-06-21 20:42:28,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:28,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:28,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:29,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:29,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:29,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609670550] [2024-06-21 20:42:29,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609670550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:29,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:29,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:42:29,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201028045] [2024-06-21 20:42:29,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:29,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:42:29,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:29,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:42:29,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:42:29,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:42:29,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 518 transitions, 6927 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:29,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:29,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:42:29,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:30,555 INFO L124 PetriNetUnfolderBase]: 1235/2228 cut-off events. [2024-06-21 20:42:30,555 INFO L125 PetriNetUnfolderBase]: For 290015/290015 co-relation queries the response was YES. [2024-06-21 20:42:30,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16684 conditions, 2228 events. 1235/2228 cut-off events. For 290015/290015 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 13877 event pairs, 97 based on Foata normal form. 2/2229 useless extension candidates. Maximal degree in co-relation 16470. Up to 1338 conditions per place. [2024-06-21 20:42:30,589 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 372 selfloop transitions, 170 changer transitions 0/544 dead transitions. [2024-06-21 20:42:30,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 544 transitions, 8229 flow [2024-06-21 20:42:30,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:42:30,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:42:30,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 168 transitions. [2024-06-21 20:42:30,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40384615384615385 [2024-06-21 20:42:30,590 INFO L175 Difference]: Start difference. First operand has 521 places, 518 transitions, 6927 flow. Second operand 13 states and 168 transitions. [2024-06-21 20:42:30,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 544 transitions, 8229 flow [2024-06-21 20:42:31,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 544 transitions, 7756 flow, removed 66 selfloop flow, removed 10 redundant places. [2024-06-21 20:42:31,772 INFO L231 Difference]: Finished difference. Result has 524 places, 520 transitions, 6943 flow [2024-06-21 20:42:31,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6454, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6943, PETRI_PLACES=524, PETRI_TRANSITIONS=520} [2024-06-21 20:42:31,772 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 493 predicate places. [2024-06-21 20:42:31,772 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 520 transitions, 6943 flow [2024-06-21 20:42:31,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:31,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:31,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:31,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-21 20:42:31,773 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:42:31,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:31,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1764996595, now seen corresponding path program 16 times [2024-06-21 20:42:31,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:31,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219837030] [2024-06-21 20:42:31,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:31,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:31,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:32,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:32,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:32,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219837030] [2024-06-21 20:42:32,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219837030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:32,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:32,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:42:32,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291374304] [2024-06-21 20:42:32,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:32,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:42:32,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:32,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:42:32,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:42:32,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:42:32,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 520 transitions, 6943 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:32,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:32,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:42:32,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:33,808 INFO L124 PetriNetUnfolderBase]: 1239/2236 cut-off events. [2024-06-21 20:42:33,808 INFO L125 PetriNetUnfolderBase]: For 291388/291388 co-relation queries the response was YES. [2024-06-21 20:42:33,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16644 conditions, 2236 events. 1239/2236 cut-off events. For 291388/291388 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 13939 event pairs, 133 based on Foata normal form. 2/2237 useless extension candidates. Maximal degree in co-relation 16429. Up to 1864 conditions per place. [2024-06-21 20:42:33,844 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 423 selfloop transitions, 111 changer transitions 0/536 dead transitions. [2024-06-21 20:42:33,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 536 transitions, 8107 flow [2024-06-21 20:42:33,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:42:33,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:42:33,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 143 transitions. [2024-06-21 20:42:33,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3723958333333333 [2024-06-21 20:42:33,846 INFO L175 Difference]: Start difference. First operand has 524 places, 520 transitions, 6943 flow. Second operand 12 states and 143 transitions. [2024-06-21 20:42:33,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 536 transitions, 8107 flow [2024-06-21 20:42:35,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 536 transitions, 7634 flow, removed 68 selfloop flow, removed 11 redundant places. [2024-06-21 20:42:35,181 INFO L231 Difference]: Finished difference. Result has 525 places, 521 transitions, 6752 flow [2024-06-21 20:42:35,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6470, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6752, PETRI_PLACES=525, PETRI_TRANSITIONS=521} [2024-06-21 20:42:35,181 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 494 predicate places. [2024-06-21 20:42:35,182 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 521 transitions, 6752 flow [2024-06-21 20:42:35,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:35,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:35,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:35,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-21 20:42:35,182 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:42:35,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:35,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1958935850, now seen corresponding path program 20 times [2024-06-21 20:42:35,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:35,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72881234] [2024-06-21 20:42:35,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:35,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:35,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:36,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:36,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:36,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72881234] [2024-06-21 20:42:36,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72881234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:36,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:36,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:42:36,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84491705] [2024-06-21 20:42:36,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:36,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:42:36,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:36,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:42:36,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:42:36,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:42:36,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 521 transitions, 6752 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:36,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:36,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:42:36,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:37,069 INFO L124 PetriNetUnfolderBase]: 1245/2246 cut-off events. [2024-06-21 20:42:37,070 INFO L125 PetriNetUnfolderBase]: For 294269/294269 co-relation queries the response was YES. [2024-06-21 20:42:37,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16529 conditions, 2246 events. 1245/2246 cut-off events. For 294269/294269 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 14054 event pairs, 93 based on Foata normal form. 2/2247 useless extension candidates. Maximal degree in co-relation 16313. Up to 1368 conditions per place. [2024-06-21 20:42:37,106 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 373 selfloop transitions, 172 changer transitions 0/547 dead transitions. [2024-06-21 20:42:37,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 547 transitions, 8064 flow [2024-06-21 20:42:37,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:42:37,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:42:37,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 167 transitions. [2024-06-21 20:42:37,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4014423076923077 [2024-06-21 20:42:37,107 INFO L175 Difference]: Start difference. First operand has 525 places, 521 transitions, 6752 flow. Second operand 13 states and 167 transitions. [2024-06-21 20:42:37,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 547 transitions, 8064 flow [2024-06-21 20:42:38,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 547 transitions, 7792 flow, removed 26 selfloop flow, removed 10 redundant places. [2024-06-21 20:42:38,431 INFO L231 Difference]: Finished difference. Result has 528 places, 523 transitions, 6977 flow [2024-06-21 20:42:38,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6480, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6977, PETRI_PLACES=528, PETRI_TRANSITIONS=523} [2024-06-21 20:42:38,432 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 497 predicate places. [2024-06-21 20:42:38,432 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 523 transitions, 6977 flow [2024-06-21 20:42:38,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:38,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:38,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:38,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-21 20:42:38,432 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:42:38,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:38,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1076954410, now seen corresponding path program 14 times [2024-06-21 20:42:38,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:38,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322132123] [2024-06-21 20:42:38,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:38,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:38,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:39,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:39,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:39,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322132123] [2024-06-21 20:42:39,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322132123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:39,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:39,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:42:39,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136594462] [2024-06-21 20:42:39,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:39,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:42:39,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:39,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:42:39,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:42:39,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:42:39,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 523 transitions, 6977 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:39,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:39,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:42:39,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:40,480 INFO L124 PetriNetUnfolderBase]: 1249/2253 cut-off events. [2024-06-21 20:42:40,480 INFO L125 PetriNetUnfolderBase]: For 297340/297340 co-relation queries the response was YES. [2024-06-21 20:42:40,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16724 conditions, 2253 events. 1249/2253 cut-off events. For 297340/297340 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 14036 event pairs, 95 based on Foata normal form. 2/2254 useless extension candidates. Maximal degree in co-relation 16507. Up to 1677 conditions per place. [2024-06-21 20:42:40,517 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 386 selfloop transitions, 153 changer transitions 0/541 dead transitions. [2024-06-21 20:42:40,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 541 transitions, 8129 flow [2024-06-21 20:42:40,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:42:40,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:42:40,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 135 transitions. [2024-06-21 20:42:40,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835227272727273 [2024-06-21 20:42:40,519 INFO L175 Difference]: Start difference. First operand has 528 places, 523 transitions, 6977 flow. Second operand 11 states and 135 transitions. [2024-06-21 20:42:40,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 541 transitions, 8129 flow [2024-06-21 20:42:41,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 541 transitions, 7648 flow, removed 70 selfloop flow, removed 11 redundant places. [2024-06-21 20:42:41,816 INFO L231 Difference]: Finished difference. Result has 528 places, 524 transitions, 6838 flow [2024-06-21 20:42:41,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6496, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6838, PETRI_PLACES=528, PETRI_TRANSITIONS=524} [2024-06-21 20:42:41,817 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 497 predicate places. [2024-06-21 20:42:41,817 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 524 transitions, 6838 flow [2024-06-21 20:42:41,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:41,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:41,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:41,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-21 20:42:41,817 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:42:41,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:41,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1964298230, now seen corresponding path program 21 times [2024-06-21 20:42:41,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:41,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652571932] [2024-06-21 20:42:41,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:41,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:41,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:42,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:42,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:42,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652571932] [2024-06-21 20:42:42,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652571932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:42,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:42,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:42:42,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467341658] [2024-06-21 20:42:42,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:42,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:42:42,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:42,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:42:42,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:42:42,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:42:42,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 524 transitions, 6838 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:42,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:42,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:42:42,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:43,741 INFO L124 PetriNetUnfolderBase]: 1255/2264 cut-off events. [2024-06-21 20:42:43,741 INFO L125 PetriNetUnfolderBase]: For 300764/300764 co-relation queries the response was YES. [2024-06-21 20:42:43,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16724 conditions, 2264 events. 1255/2264 cut-off events. For 300764/300764 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 14146 event pairs, 95 based on Foata normal form. 2/2265 useless extension candidates. Maximal degree in co-relation 16506. Up to 1362 conditions per place. [2024-06-21 20:42:43,776 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 357 selfloop transitions, 187 changer transitions 0/546 dead transitions. [2024-06-21 20:42:43,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 546 transitions, 8138 flow [2024-06-21 20:42:43,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:42:43,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:42:43,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 153 transitions. [2024-06-21 20:42:43,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3984375 [2024-06-21 20:42:43,777 INFO L175 Difference]: Start difference. First operand has 528 places, 524 transitions, 6838 flow. Second operand 12 states and 153 transitions. [2024-06-21 20:42:43,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 546 transitions, 8138 flow [2024-06-21 20:42:45,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 546 transitions, 7806 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-21 20:42:45,068 INFO L231 Difference]: Finished difference. Result has 531 places, 526 transitions, 7037 flow [2024-06-21 20:42:45,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6506, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7037, PETRI_PLACES=531, PETRI_TRANSITIONS=526} [2024-06-21 20:42:45,069 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 500 predicate places. [2024-06-21 20:42:45,069 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 526 transitions, 7037 flow [2024-06-21 20:42:45,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:45,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:45,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:45,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-21 20:42:45,070 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:42:45,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:45,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1964442535, now seen corresponding path program 17 times [2024-06-21 20:42:45,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:45,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736484197] [2024-06-21 20:42:45,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:45,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:45,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:46,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:46,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:46,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736484197] [2024-06-21 20:42:46,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736484197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:46,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:46,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:42:46,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721891981] [2024-06-21 20:42:46,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:46,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:42:46,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:46,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:42:46,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:42:46,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:42:46,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 526 transitions, 7037 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:46,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:46,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:42:46,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:46,963 INFO L124 PetriNetUnfolderBase]: 1259/2272 cut-off events. [2024-06-21 20:42:46,963 INFO L125 PetriNetUnfolderBase]: For 305788/305788 co-relation queries the response was YES. [2024-06-21 20:42:46,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16936 conditions, 2272 events. 1259/2272 cut-off events. For 305788/305788 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 14222 event pairs, 137 based on Foata normal form. 2/2273 useless extension candidates. Maximal degree in co-relation 16717. Up to 1877 conditions per place. [2024-06-21 20:42:46,998 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 414 selfloop transitions, 126 changer transitions 0/542 dead transitions. [2024-06-21 20:42:46,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 542 transitions, 8215 flow [2024-06-21 20:42:46,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:42:46,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:42:46,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 142 transitions. [2024-06-21 20:42:46,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3697916666666667 [2024-06-21 20:42:46,999 INFO L175 Difference]: Start difference. First operand has 531 places, 526 transitions, 7037 flow. Second operand 12 states and 142 transitions. [2024-06-21 20:42:46,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 542 transitions, 8215 flow [2024-06-21 20:42:48,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 542 transitions, 7700 flow, removed 72 selfloop flow, removed 10 redundant places. [2024-06-21 20:42:48,418 INFO L231 Difference]: Finished difference. Result has 533 places, 527 transitions, 6836 flow [2024-06-21 20:42:48,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6522, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6836, PETRI_PLACES=533, PETRI_TRANSITIONS=527} [2024-06-21 20:42:48,419 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 502 predicate places. [2024-06-21 20:42:48,419 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 527 transitions, 6836 flow [2024-06-21 20:42:48,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:48,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:48,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:48,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-21 20:42:48,419 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:42:48,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:48,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1964442380, now seen corresponding path program 22 times [2024-06-21 20:42:48,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:48,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12094667] [2024-06-21 20:42:48,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:48,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:48,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:49,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:49,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:49,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12094667] [2024-06-21 20:42:49,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12094667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:49,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:49,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:42:49,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674121737] [2024-06-21 20:42:49,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:49,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:42:49,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:49,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:42:49,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:42:49,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:42:49,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 527 transitions, 6836 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:49,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:49,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:42:49,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:50,379 INFO L124 PetriNetUnfolderBase]: 1265/2282 cut-off events. [2024-06-21 20:42:50,380 INFO L125 PetriNetUnfolderBase]: For 307787/307787 co-relation queries the response was YES. [2024-06-21 20:42:50,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16809 conditions, 2282 events. 1265/2282 cut-off events. For 307787/307787 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 14315 event pairs, 90 based on Foata normal form. 2/2283 useless extension candidates. Maximal degree in co-relation 16589. Up to 1273 conditions per place. [2024-06-21 20:42:50,413 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 338 selfloop transitions, 211 changer transitions 0/551 dead transitions. [2024-06-21 20:42:50,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 545 places, 551 transitions, 8156 flow [2024-06-21 20:42:50,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:42:50,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:42:50,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 165 transitions. [2024-06-21 20:42:50,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39663461538461536 [2024-06-21 20:42:50,414 INFO L175 Difference]: Start difference. First operand has 533 places, 527 transitions, 6836 flow. Second operand 13 states and 165 transitions. [2024-06-21 20:42:50,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 545 places, 551 transitions, 8156 flow [2024-06-21 20:42:51,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 551 transitions, 7852 flow, removed 27 selfloop flow, removed 10 redundant places. [2024-06-21 20:42:51,866 INFO L231 Difference]: Finished difference. Result has 536 places, 529 transitions, 7115 flow [2024-06-21 20:42:51,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6532, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7115, PETRI_PLACES=536, PETRI_TRANSITIONS=529} [2024-06-21 20:42:51,866 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 505 predicate places. [2024-06-21 20:42:51,866 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 529 transitions, 7115 flow [2024-06-21 20:42:51,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:51,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:51,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:51,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-21 20:42:51,867 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:42:51,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:51,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1964446255, now seen corresponding path program 18 times [2024-06-21 20:42:51,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:51,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87944113] [2024-06-21 20:42:51,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:51,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:51,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:52,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:52,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:52,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87944113] [2024-06-21 20:42:52,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87944113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:52,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:52,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:42:52,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622117095] [2024-06-21 20:42:52,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:52,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:42:52,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:52,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:42:52,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:42:52,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:42:52,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 529 transitions, 7115 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:52,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:52,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:42:52,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:53,713 INFO L124 PetriNetUnfolderBase]: 1269/2290 cut-off events. [2024-06-21 20:42:53,713 INFO L125 PetriNetUnfolderBase]: For 312352/312352 co-relation queries the response was YES. [2024-06-21 20:42:53,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17127 conditions, 2290 events. 1269/2290 cut-off events. For 312352/312352 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 14347 event pairs, 137 based on Foata normal form. 2/2291 useless extension candidates. Maximal degree in co-relation 16906. Up to 1857 conditions per place. [2024-06-21 20:42:53,748 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 413 selfloop transitions, 131 changer transitions 0/546 dead transitions. [2024-06-21 20:42:53,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 546 transitions, 8305 flow [2024-06-21 20:42:53,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:42:53,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:42:53,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 143 transitions. [2024-06-21 20:42:53,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3723958333333333 [2024-06-21 20:42:53,750 INFO L175 Difference]: Start difference. First operand has 536 places, 529 transitions, 7115 flow. Second operand 12 states and 143 transitions. [2024-06-21 20:42:53,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 546 transitions, 8305 flow [2024-06-21 20:42:55,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 546 transitions, 7738 flow, removed 74 selfloop flow, removed 11 redundant places. [2024-06-21 20:42:55,320 INFO L231 Difference]: Finished difference. Result has 537 places, 530 transitions, 6874 flow [2024-06-21 20:42:55,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6548, PETRI_DIFFERENCE_MINUEND_PLACES=525, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6874, PETRI_PLACES=537, PETRI_TRANSITIONS=530} [2024-06-21 20:42:55,320 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 506 predicate places. [2024-06-21 20:42:55,320 INFO L495 AbstractCegarLoop]: Abstraction has has 537 places, 530 transitions, 6874 flow [2024-06-21 20:42:55,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:55,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:55,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:55,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-21 20:42:55,321 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:42:55,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:55,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1077271540, now seen corresponding path program 15 times [2024-06-21 20:42:55,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:55,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699965305] [2024-06-21 20:42:55,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:55,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:55,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:56,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:56,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:56,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699965305] [2024-06-21 20:42:56,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699965305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:56,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:56,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:42:56,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804625168] [2024-06-21 20:42:56,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:56,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:42:56,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:56,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:42:56,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:42:56,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:42:56,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 537 places, 530 transitions, 6874 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:56,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:56,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:42:56,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:42:57,165 INFO L124 PetriNetUnfolderBase]: 1273/2297 cut-off events. [2024-06-21 20:42:57,165 INFO L125 PetriNetUnfolderBase]: For 311068/311068 co-relation queries the response was YES. [2024-06-21 20:42:57,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16775 conditions, 2297 events. 1273/2297 cut-off events. For 311068/311068 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 14383 event pairs, 102 based on Foata normal form. 2/2298 useless extension candidates. Maximal degree in co-relation 16553. Up to 1565 conditions per place. [2024-06-21 20:42:57,201 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 381 selfloop transitions, 165 changer transitions 0/548 dead transitions. [2024-06-21 20:42:57,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 548 transitions, 8040 flow [2024-06-21 20:42:57,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:42:57,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:42:57,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 135 transitions. [2024-06-21 20:42:57,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835227272727273 [2024-06-21 20:42:57,202 INFO L175 Difference]: Start difference. First operand has 537 places, 530 transitions, 6874 flow. Second operand 11 states and 135 transitions. [2024-06-21 20:42:57,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 548 transitions, 8040 flow [2024-06-21 20:42:58,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 548 transitions, 7744 flow, removed 28 selfloop flow, removed 9 redundant places. [2024-06-21 20:42:58,713 INFO L231 Difference]: Finished difference. Result has 539 places, 531 transitions, 6946 flow [2024-06-21 20:42:58,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6578, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6946, PETRI_PLACES=539, PETRI_TRANSITIONS=531} [2024-06-21 20:42:58,713 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 508 predicate places. [2024-06-21 20:42:58,713 INFO L495 AbstractCegarLoop]: Abstraction has has 539 places, 531 transitions, 6946 flow [2024-06-21 20:42:58,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:58,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:42:58,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:42:58,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-21 20:42:58,713 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:42:58,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:42:58,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1369763180, now seen corresponding path program 16 times [2024-06-21 20:42:58,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:42:58,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946407542] [2024-06-21 20:42:58,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:42:58,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:42:58,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:42:59,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:42:59,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:42:59,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946407542] [2024-06-21 20:42:59,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946407542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:42:59,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:42:59,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:42:59,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589440033] [2024-06-21 20:42:59,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:42:59,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:42:59,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:42:59,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:42:59,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:42:59,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:42:59,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 531 transitions, 6946 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:42:59,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:42:59,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:42:59,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:00,791 INFO L124 PetriNetUnfolderBase]: 1289/2326 cut-off events. [2024-06-21 20:43:00,792 INFO L125 PetriNetUnfolderBase]: For 314316/314316 co-relation queries the response was YES. [2024-06-21 20:43:00,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17063 conditions, 2326 events. 1289/2326 cut-off events. For 314316/314316 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 14631 event pairs, 249 based on Foata normal form. 2/2327 useless extension candidates. Maximal degree in co-relation 16840. Up to 2251 conditions per place. [2024-06-21 20:43:00,829 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 524 selfloop transitions, 25 changer transitions 0/551 dead transitions. [2024-06-21 20:43:00,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 549 places, 551 transitions, 8192 flow [2024-06-21 20:43:00,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:43:00,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:43:00,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-21 20:43:00,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3494318181818182 [2024-06-21 20:43:00,830 INFO L175 Difference]: Start difference. First operand has 539 places, 531 transitions, 6946 flow. Second operand 11 states and 123 transitions. [2024-06-21 20:43:00,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 549 places, 551 transitions, 8192 flow [2024-06-21 20:43:02,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 551 transitions, 7826 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-21 20:43:02,376 INFO L231 Difference]: Finished difference. Result has 541 places, 536 transitions, 6744 flow [2024-06-21 20:43:02,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6588, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6744, PETRI_PLACES=541, PETRI_TRANSITIONS=536} [2024-06-21 20:43:02,377 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 510 predicate places. [2024-06-21 20:43:02,377 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 536 transitions, 6744 flow [2024-06-21 20:43:02,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:02,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:02,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:02,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-21 20:43:02,377 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:43:02,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:02,377 INFO L85 PathProgramCache]: Analyzing trace with hash 173065674, now seen corresponding path program 17 times [2024-06-21 20:43:02,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:02,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431276885] [2024-06-21 20:43:02,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:02,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:02,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:03,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:03,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:03,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431276885] [2024-06-21 20:43:03,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431276885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:03,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:03,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:43:03,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090168793] [2024-06-21 20:43:03,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:03,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:43:03,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:03,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:43:03,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:43:03,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:43:03,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 536 transitions, 6744 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:03,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:03,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:43:03,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:04,716 INFO L124 PetriNetUnfolderBase]: 1299/2344 cut-off events. [2024-06-21 20:43:04,716 INFO L125 PetriNetUnfolderBase]: For 316899/316899 co-relation queries the response was YES. [2024-06-21 20:43:04,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16836 conditions, 2344 events. 1299/2344 cut-off events. For 316899/316899 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 14748 event pairs, 249 based on Foata normal form. 2/2345 useless extension candidates. Maximal degree in co-relation 16612. Up to 2157 conditions per place. [2024-06-21 20:43:04,757 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 501 selfloop transitions, 51 changer transitions 0/554 dead transitions. [2024-06-21 20:43:04,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 551 places, 554 transitions, 7957 flow [2024-06-21 20:43:04,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:43:04,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:43:04,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-06-21 20:43:04,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3664772727272727 [2024-06-21 20:43:04,759 INFO L175 Difference]: Start difference. First operand has 541 places, 536 transitions, 6744 flow. Second operand 11 states and 129 transitions. [2024-06-21 20:43:04,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 551 places, 554 transitions, 7957 flow [2024-06-21 20:43:06,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 545 places, 554 transitions, 7890 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 20:43:06,240 INFO L231 Difference]: Finished difference. Result has 546 places, 539 transitions, 6854 flow [2024-06-21 20:43:06,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6677, PETRI_DIFFERENCE_MINUEND_PLACES=535, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6854, PETRI_PLACES=546, PETRI_TRANSITIONS=539} [2024-06-21 20:43:06,240 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 515 predicate places. [2024-06-21 20:43:06,240 INFO L495 AbstractCegarLoop]: Abstraction has has 546 places, 539 transitions, 6854 flow [2024-06-21 20:43:06,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:06,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:06,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:06,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-21 20:43:06,241 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:43:06,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:06,241 INFO L85 PathProgramCache]: Analyzing trace with hash 173074974, now seen corresponding path program 18 times [2024-06-21 20:43:06,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:06,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719778306] [2024-06-21 20:43:06,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:06,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:06,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:07,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:07,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:07,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719778306] [2024-06-21 20:43:07,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719778306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:07,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:07,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:43:07,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841911955] [2024-06-21 20:43:07,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:07,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:43:07,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:07,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:43:07,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:43:07,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:43:07,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 546 places, 539 transitions, 6854 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:07,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:07,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:43:07,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:08,651 INFO L124 PetriNetUnfolderBase]: 1303/2352 cut-off events. [2024-06-21 20:43:08,651 INFO L125 PetriNetUnfolderBase]: For 320849/320849 co-relation queries the response was YES. [2024-06-21 20:43:08,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16959 conditions, 2352 events. 1303/2352 cut-off events. For 320849/320849 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 14845 event pairs, 247 based on Foata normal form. 2/2353 useless extension candidates. Maximal degree in co-relation 16734. Up to 2151 conditions per place. [2024-06-21 20:43:08,682 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 501 selfloop transitions, 52 changer transitions 0/555 dead transitions. [2024-06-21 20:43:08,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 556 places, 555 transitions, 8036 flow [2024-06-21 20:43:08,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:43:08,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:43:08,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-06-21 20:43:08,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3693181818181818 [2024-06-21 20:43:08,683 INFO L175 Difference]: Start difference. First operand has 546 places, 539 transitions, 6854 flow. Second operand 11 states and 130 transitions. [2024-06-21 20:43:08,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 556 places, 555 transitions, 8036 flow [2024-06-21 20:43:10,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 550 places, 555 transitions, 7925 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 20:43:10,297 INFO L231 Difference]: Finished difference. Result has 551 places, 540 transitions, 6891 flow [2024-06-21 20:43:10,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6743, PETRI_DIFFERENCE_MINUEND_PLACES=540, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6891, PETRI_PLACES=551, PETRI_TRANSITIONS=540} [2024-06-21 20:43:10,297 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 520 predicate places. [2024-06-21 20:43:10,297 INFO L495 AbstractCegarLoop]: Abstraction has has 551 places, 540 transitions, 6891 flow [2024-06-21 20:43:10,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:10,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:10,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:10,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-21 20:43:10,298 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:43:10,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:10,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1626306746, now seen corresponding path program 19 times [2024-06-21 20:43:10,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:10,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803954325] [2024-06-21 20:43:10,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:10,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:10,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:11,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:11,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:11,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803954325] [2024-06-21 20:43:11,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803954325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:11,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:11,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:43:11,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317285298] [2024-06-21 20:43:11,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:11,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:43:11,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:11,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:43:11,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:43:11,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:43:11,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 551 places, 540 transitions, 6891 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:11,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:11,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:43:11,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:12,115 INFO L124 PetriNetUnfolderBase]: 1313/2370 cut-off events. [2024-06-21 20:43:12,115 INFO L125 PetriNetUnfolderBase]: For 325803/325803 co-relation queries the response was YES. [2024-06-21 20:43:12,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17098 conditions, 2370 events. 1313/2370 cut-off events. For 325803/325803 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 14975 event pairs, 245 based on Foata normal form. 2/2371 useless extension candidates. Maximal degree in co-relation 16872. Up to 2204 conditions per place. [2024-06-21 20:43:12,149 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 510 selfloop transitions, 47 changer transitions 0/559 dead transitions. [2024-06-21 20:43:12,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 559 transitions, 8126 flow [2024-06-21 20:43:12,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:43:12,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:43:12,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-06-21 20:43:12,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3664772727272727 [2024-06-21 20:43:12,150 INFO L175 Difference]: Start difference. First operand has 551 places, 540 transitions, 6891 flow. Second operand 11 states and 129 transitions. [2024-06-21 20:43:12,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 559 transitions, 8126 flow [2024-06-21 20:43:13,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 552 places, 559 transitions, 7984 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-21 20:43:13,742 INFO L231 Difference]: Finished difference. Result has 553 places, 543 transitions, 6926 flow [2024-06-21 20:43:13,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6753, PETRI_DIFFERENCE_MINUEND_PLACES=542, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6926, PETRI_PLACES=553, PETRI_TRANSITIONS=543} [2024-06-21 20:43:13,743 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 522 predicate places. [2024-06-21 20:43:13,743 INFO L495 AbstractCegarLoop]: Abstraction has has 553 places, 543 transitions, 6926 flow [2024-06-21 20:43:13,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:13,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:13,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:13,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-21 20:43:13,743 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:43:13,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:13,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1560669429, now seen corresponding path program 19 times [2024-06-21 20:43:13,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:13,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516272825] [2024-06-21 20:43:13,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:13,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:13,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:14,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:14,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:14,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516272825] [2024-06-21 20:43:14,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516272825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:14,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:14,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:43:14,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605702806] [2024-06-21 20:43:14,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:14,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:43:14,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:14,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:43:14,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:43:14,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:43:14,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 553 places, 543 transitions, 6926 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:14,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:14,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:43:14,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:15,785 INFO L124 PetriNetUnfolderBase]: 1317/2378 cut-off events. [2024-06-21 20:43:15,786 INFO L125 PetriNetUnfolderBase]: For 329407/329407 co-relation queries the response was YES. [2024-06-21 20:43:15,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17175 conditions, 2378 events. 1317/2378 cut-off events. For 329407/329407 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 15017 event pairs, 263 based on Foata normal form. 2/2379 useless extension candidates. Maximal degree in co-relation 16948. Up to 2279 conditions per place. [2024-06-21 20:43:15,821 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 499 selfloop transitions, 55 changer transitions 0/556 dead transitions. [2024-06-21 20:43:15,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 564 places, 556 transitions, 8120 flow [2024-06-21 20:43:15,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:43:15,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:43:15,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 130 transitions. [2024-06-21 20:43:15,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3385416666666667 [2024-06-21 20:43:15,822 INFO L175 Difference]: Start difference. First operand has 553 places, 543 transitions, 6926 flow. Second operand 12 states and 130 transitions. [2024-06-21 20:43:15,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 564 places, 556 transitions, 8120 flow [2024-06-21 20:43:17,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 556 places, 556 transitions, 7992 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-21 20:43:17,587 INFO L231 Difference]: Finished difference. Result has 557 places, 544 transitions, 6974 flow [2024-06-21 20:43:17,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6798, PETRI_DIFFERENCE_MINUEND_PLACES=545, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6974, PETRI_PLACES=557, PETRI_TRANSITIONS=544} [2024-06-21 20:43:17,587 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 526 predicate places. [2024-06-21 20:43:17,587 INFO L495 AbstractCegarLoop]: Abstraction has has 557 places, 544 transitions, 6974 flow [2024-06-21 20:43:17,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:17,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:17,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:17,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-21 20:43:17,588 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:43:17,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:17,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1646163982, now seen corresponding path program 20 times [2024-06-21 20:43:17,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:17,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959116185] [2024-06-21 20:43:17,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:17,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:17,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:18,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:18,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:18,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959116185] [2024-06-21 20:43:18,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959116185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:18,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:18,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:43:18,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915170420] [2024-06-21 20:43:18,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:18,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:43:18,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:18,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:43:18,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:43:18,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:43:18,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 557 places, 544 transitions, 6974 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:18,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:18,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:43:18,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:19,957 INFO L124 PetriNetUnfolderBase]: 1327/2396 cut-off events. [2024-06-21 20:43:19,957 INFO L125 PetriNetUnfolderBase]: For 333058/333058 co-relation queries the response was YES. [2024-06-21 20:43:19,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17290 conditions, 2396 events. 1327/2396 cut-off events. For 333058/333058 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 15205 event pairs, 249 based on Foata normal form. 2/2397 useless extension candidates. Maximal degree in co-relation 17062. Up to 2201 conditions per place. [2024-06-21 20:43:20,001 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 509 selfloop transitions, 52 changer transitions 0/563 dead transitions. [2024-06-21 20:43:20,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 567 places, 563 transitions, 8215 flow [2024-06-21 20:43:20,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:43:20,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:43:20,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 132 transitions. [2024-06-21 20:43:20,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 20:43:20,003 INFO L175 Difference]: Start difference. First operand has 557 places, 544 transitions, 6974 flow. Second operand 11 states and 132 transitions. [2024-06-21 20:43:20,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 567 places, 563 transitions, 8215 flow [2024-06-21 20:43:21,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 563 transitions, 8049 flow, removed 29 selfloop flow, removed 10 redundant places. [2024-06-21 20:43:21,738 INFO L231 Difference]: Finished difference. Result has 558 places, 547 transitions, 6993 flow [2024-06-21 20:43:21,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6808, PETRI_DIFFERENCE_MINUEND_PLACES=547, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6993, PETRI_PLACES=558, PETRI_TRANSITIONS=547} [2024-06-21 20:43:21,739 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 527 predicate places. [2024-06-21 20:43:21,739 INFO L495 AbstractCegarLoop]: Abstraction has has 558 places, 547 transitions, 6993 flow [2024-06-21 20:43:21,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:21,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:21,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:21,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-21 20:43:21,739 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:43:21,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:21,740 INFO L85 PathProgramCache]: Analyzing trace with hash 2005979278, now seen corresponding path program 21 times [2024-06-21 20:43:21,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:21,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529730735] [2024-06-21 20:43:21,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:21,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:21,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:22,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:22,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:22,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529730735] [2024-06-21 20:43:22,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529730735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:22,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:22,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:43:22,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802599882] [2024-06-21 20:43:22,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:22,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:43:22,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:22,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:43:22,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:43:23,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:43:23,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 558 places, 547 transitions, 6993 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:23,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:23,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:43:23,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:24,075 INFO L124 PetriNetUnfolderBase]: 1331/2404 cut-off events. [2024-06-21 20:43:24,075 INFO L125 PetriNetUnfolderBase]: For 335875/335875 co-relation queries the response was YES. [2024-06-21 20:43:24,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17323 conditions, 2404 events. 1331/2404 cut-off events. For 335875/335875 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 15240 event pairs, 261 based on Foata normal form. 2/2405 useless extension candidates. Maximal degree in co-relation 17094. Up to 2329 conditions per place. [2024-06-21 20:43:24,116 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 535 selfloop transitions, 25 changer transitions 0/562 dead transitions. [2024-06-21 20:43:24,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 568 places, 562 transitions, 8193 flow [2024-06-21 20:43:24,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:43:24,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:43:24,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2024-06-21 20:43:24,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3465909090909091 [2024-06-21 20:43:24,125 INFO L175 Difference]: Start difference. First operand has 558 places, 547 transitions, 6993 flow. Second operand 11 states and 122 transitions. [2024-06-21 20:43:24,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 568 places, 562 transitions, 8193 flow [2024-06-21 20:43:25,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 561 places, 562 transitions, 8060 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-21 20:43:25,943 INFO L231 Difference]: Finished difference. Result has 562 places, 548 transitions, 6960 flow [2024-06-21 20:43:25,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6860, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6960, PETRI_PLACES=562, PETRI_TRANSITIONS=548} [2024-06-21 20:43:25,944 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 531 predicate places. [2024-06-21 20:43:25,946 INFO L495 AbstractCegarLoop]: Abstraction has has 562 places, 548 transitions, 6960 flow [2024-06-21 20:43:25,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:25,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:25,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:25,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-21 20:43:25,947 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:43:25,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:25,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1646154682, now seen corresponding path program 22 times [2024-06-21 20:43:25,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:25,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871800549] [2024-06-21 20:43:25,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:25,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:25,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:27,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:27,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:27,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871800549] [2024-06-21 20:43:27,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871800549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:27,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:27,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:43:27,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134508400] [2024-06-21 20:43:27,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:27,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:43:27,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:27,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:43:27,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:43:27,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:43:27,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 562 places, 548 transitions, 6960 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:27,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:27,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:43:27,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:28,068 INFO L124 PetriNetUnfolderBase]: 1342/2425 cut-off events. [2024-06-21 20:43:28,068 INFO L125 PetriNetUnfolderBase]: For 373159/373159 co-relation queries the response was YES. [2024-06-21 20:43:28,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17838 conditions, 2425 events. 1342/2425 cut-off events. For 373159/373159 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 15408 event pairs, 256 based on Foata normal form. 2/2426 useless extension candidates. Maximal degree in co-relation 17608. Up to 2232 conditions per place. [2024-06-21 20:43:28,109 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 516 selfloop transitions, 49 changer transitions 0/567 dead transitions. [2024-06-21 20:43:28,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 572 places, 567 transitions, 8588 flow [2024-06-21 20:43:28,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:43:28,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:43:28,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 132 transitions. [2024-06-21 20:43:28,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 20:43:28,110 INFO L175 Difference]: Start difference. First operand has 562 places, 548 transitions, 6960 flow. Second operand 11 states and 132 transitions. [2024-06-21 20:43:28,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 572 places, 567 transitions, 8588 flow [2024-06-21 20:43:30,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 563 places, 567 transitions, 8491 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-21 20:43:30,115 INFO L231 Difference]: Finished difference. Result has 564 places, 550 transitions, 7059 flow [2024-06-21 20:43:30,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6863, PETRI_DIFFERENCE_MINUEND_PLACES=553, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7059, PETRI_PLACES=564, PETRI_TRANSITIONS=550} [2024-06-21 20:43:30,115 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 533 predicate places. [2024-06-21 20:43:30,116 INFO L495 AbstractCegarLoop]: Abstraction has has 564 places, 550 transitions, 7059 flow [2024-06-21 20:43:30,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:30,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:30,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:30,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-21 20:43:30,116 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:43:30,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:30,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1071258768, now seen corresponding path program 23 times [2024-06-21 20:43:30,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:30,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546969261] [2024-06-21 20:43:30,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:30,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:30,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:31,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:31,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:31,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546969261] [2024-06-21 20:43:31,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546969261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:31,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:31,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:43:31,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589744242] [2024-06-21 20:43:31,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:31,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:43:31,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:31,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:43:31,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:43:31,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:43:31,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 564 places, 550 transitions, 7059 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:31,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:31,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:43:31,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:32,525 INFO L124 PetriNetUnfolderBase]: 1360/2455 cut-off events. [2024-06-21 20:43:32,525 INFO L125 PetriNetUnfolderBase]: For 381141/381141 co-relation queries the response was YES. [2024-06-21 20:43:32,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18241 conditions, 2455 events. 1360/2455 cut-off events. For 381141/381141 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 15631 event pairs, 260 based on Foata normal form. 2/2456 useless extension candidates. Maximal degree in co-relation 18010. Up to 2191 conditions per place. [2024-06-21 20:43:32,570 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 515 selfloop transitions, 57 changer transitions 0/574 dead transitions. [2024-06-21 20:43:32,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 575 places, 574 transitions, 8467 flow [2024-06-21 20:43:32,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:43:32,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:43:32,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 146 transitions. [2024-06-21 20:43:32,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3802083333333333 [2024-06-21 20:43:32,572 INFO L175 Difference]: Start difference. First operand has 564 places, 550 transitions, 7059 flow. Second operand 12 states and 146 transitions. [2024-06-21 20:43:32,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 575 places, 574 transitions, 8467 flow [2024-06-21 20:43:34,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 568 places, 574 transitions, 8359 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-21 20:43:34,506 INFO L231 Difference]: Finished difference. Result has 569 places, 556 transitions, 7286 flow [2024-06-21 20:43:34,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6951, PETRI_DIFFERENCE_MINUEND_PLACES=557, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7286, PETRI_PLACES=569, PETRI_TRANSITIONS=556} [2024-06-21 20:43:34,507 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 538 predicate places. [2024-06-21 20:43:34,507 INFO L495 AbstractCegarLoop]: Abstraction has has 569 places, 556 transitions, 7286 flow [2024-06-21 20:43:34,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:34,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:34,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:34,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-21 20:43:34,508 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:43:34,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:34,508 INFO L85 PathProgramCache]: Analyzing trace with hash 41392498, now seen corresponding path program 23 times [2024-06-21 20:43:34,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:34,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677910412] [2024-06-21 20:43:34,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:34,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:34,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:35,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:35,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:35,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677910412] [2024-06-21 20:43:35,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677910412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:35,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:35,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:43:35,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125453318] [2024-06-21 20:43:35,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:35,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:43:35,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:35,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:43:35,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:43:35,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:43:35,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 569 places, 556 transitions, 7286 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:35,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:35,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:43:35,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:36,432 INFO L124 PetriNetUnfolderBase]: 1357/2450 cut-off events. [2024-06-21 20:43:36,432 INFO L125 PetriNetUnfolderBase]: For 350375/350375 co-relation queries the response was YES. [2024-06-21 20:43:36,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17875 conditions, 2450 events. 1357/2450 cut-off events. For 350375/350375 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 15602 event pairs, 257 based on Foata normal form. 2/2451 useless extension candidates. Maximal degree in co-relation 17642. Up to 2280 conditions per place. [2024-06-21 20:43:36,472 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 522 selfloop transitions, 48 changer transitions 0/572 dead transitions. [2024-06-21 20:43:36,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 579 places, 572 transitions, 8470 flow [2024-06-21 20:43:36,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:43:36,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:43:36,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-06-21 20:43:36,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3693181818181818 [2024-06-21 20:43:36,473 INFO L175 Difference]: Start difference. First operand has 569 places, 556 transitions, 7286 flow. Second operand 11 states and 130 transitions. [2024-06-21 20:43:36,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 579 places, 572 transitions, 8470 flow [2024-06-21 20:43:38,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 572 places, 572 transitions, 8190 flow, removed 95 selfloop flow, removed 7 redundant places. [2024-06-21 20:43:38,268 INFO L231 Difference]: Finished difference. Result has 573 places, 556 transitions, 7106 flow [2024-06-21 20:43:38,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=7006, PETRI_DIFFERENCE_MINUEND_PLACES=562, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7106, PETRI_PLACES=573, PETRI_TRANSITIONS=556} [2024-06-21 20:43:38,268 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 542 predicate places. [2024-06-21 20:43:38,269 INFO L495 AbstractCegarLoop]: Abstraction has has 573 places, 556 transitions, 7106 flow [2024-06-21 20:43:38,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:38,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:38,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:38,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-21 20:43:38,269 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:43:38,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:38,269 INFO L85 PathProgramCache]: Analyzing trace with hash -92841352, now seen corresponding path program 24 times [2024-06-21 20:43:38,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:38,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248554866] [2024-06-21 20:43:38,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:38,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:38,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:39,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:39,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:39,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248554866] [2024-06-21 20:43:39,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248554866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:39,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:39,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:43:39,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824502334] [2024-06-21 20:43:39,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:39,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:43:39,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:39,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:43:39,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:43:39,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:43:39,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 573 places, 556 transitions, 7106 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:39,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:39,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:43:39,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:40,562 INFO L124 PetriNetUnfolderBase]: 1369/2470 cut-off events. [2024-06-21 20:43:40,562 INFO L125 PetriNetUnfolderBase]: For 354283/354283 co-relation queries the response was YES. [2024-06-21 20:43:40,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17920 conditions, 2470 events. 1369/2470 cut-off events. For 354283/354283 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 15732 event pairs, 251 based on Foata normal form. 2/2471 useless extension candidates. Maximal degree in co-relation 17686. Up to 2202 conditions per place. [2024-06-21 20:43:40,603 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 514 selfloop transitions, 62 changer transitions 0/578 dead transitions. [2024-06-21 20:43:40,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 584 places, 578 transitions, 8498 flow [2024-06-21 20:43:40,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:43:40,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:43:40,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 144 transitions. [2024-06-21 20:43:40,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 20:43:40,604 INFO L175 Difference]: Start difference. First operand has 573 places, 556 transitions, 7106 flow. Second operand 12 states and 144 transitions. [2024-06-21 20:43:40,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 584 places, 578 transitions, 8498 flow [2024-06-21 20:43:42,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 573 places, 578 transitions, 8383 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-06-21 20:43:42,550 INFO L231 Difference]: Finished difference. Result has 574 places, 560 transitions, 7312 flow [2024-06-21 20:43:42,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6991, PETRI_DIFFERENCE_MINUEND_PLACES=562, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7312, PETRI_PLACES=574, PETRI_TRANSITIONS=560} [2024-06-21 20:43:42,551 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 543 predicate places. [2024-06-21 20:43:42,551 INFO L495 AbstractCegarLoop]: Abstraction has has 574 places, 560 transitions, 7312 flow [2024-06-21 20:43:42,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:42,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:42,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:42,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-21 20:43:42,552 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:43:42,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:42,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1432367336, now seen corresponding path program 24 times [2024-06-21 20:43:42,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:42,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036887738] [2024-06-21 20:43:42,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:42,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:42,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:43,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:43,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:43,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036887738] [2024-06-21 20:43:43,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036887738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:43,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:43,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 20:43:43,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824525165] [2024-06-21 20:43:43,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:43,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 20:43:43,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:43,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 20:43:43,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-06-21 20:43:43,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:43:43,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 574 places, 560 transitions, 7312 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:43,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:43,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:43:43,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:44,471 INFO L124 PetriNetUnfolderBase]: 1373/2478 cut-off events. [2024-06-21 20:43:44,471 INFO L125 PetriNetUnfolderBase]: For 358407/358407 co-relation queries the response was YES. [2024-06-21 20:43:44,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18086 conditions, 2478 events. 1373/2478 cut-off events. For 358407/358407 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 15815 event pairs, 251 based on Foata normal form. 2/2479 useless extension candidates. Maximal degree in co-relation 17851. Up to 2308 conditions per place. [2024-06-21 20:43:44,508 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 519 selfloop transitions, 55 changer transitions 0/576 dead transitions. [2024-06-21 20:43:44,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 584 places, 576 transitions, 8548 flow [2024-06-21 20:43:44,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:43:44,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:43:44,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 126 transitions. [2024-06-21 20:43:44,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35795454545454547 [2024-06-21 20:43:44,509 INFO L175 Difference]: Start difference. First operand has 574 places, 560 transitions, 7312 flow. Second operand 11 states and 126 transitions. [2024-06-21 20:43:44,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 584 places, 576 transitions, 8548 flow [2024-06-21 20:43:46,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 575 places, 576 transitions, 8273 flow, removed 78 selfloop flow, removed 9 redundant places. [2024-06-21 20:43:46,361 INFO L231 Difference]: Finished difference. Result has 576 places, 561 transitions, 7201 flow [2024-06-21 20:43:46,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=7037, PETRI_DIFFERENCE_MINUEND_PLACES=565, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7201, PETRI_PLACES=576, PETRI_TRANSITIONS=561} [2024-06-21 20:43:46,362 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 545 predicate places. [2024-06-21 20:43:46,362 INFO L495 AbstractCegarLoop]: Abstraction has has 576 places, 561 transitions, 7201 flow [2024-06-21 20:43:46,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:46,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:46,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:46,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-21 20:43:46,362 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:43:46,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:46,362 INFO L85 PathProgramCache]: Analyzing trace with hash 41384562, now seen corresponding path program 25 times [2024-06-21 20:43:46,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:46,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547012509] [2024-06-21 20:43:46,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:46,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:46,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:47,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:47,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:47,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547012509] [2024-06-21 20:43:47,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547012509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:47,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:47,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:43:47,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166887384] [2024-06-21 20:43:47,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:47,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:43:47,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:47,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:43:47,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:43:47,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:43:47,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 576 places, 561 transitions, 7201 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:47,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:47,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:43:47,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:48,641 INFO L124 PetriNetUnfolderBase]: 1379/2488 cut-off events. [2024-06-21 20:43:48,641 INFO L125 PetriNetUnfolderBase]: For 362873/362873 co-relation queries the response was YES. [2024-06-21 20:43:48,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18139 conditions, 2488 events. 1379/2488 cut-off events. For 362873/362873 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 15877 event pairs, 257 based on Foata normal form. 2/2489 useless extension candidates. Maximal degree in co-relation 17903. Up to 2220 conditions per place. [2024-06-21 20:43:48,677 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 519 selfloop transitions, 60 changer transitions 0/581 dead transitions. [2024-06-21 20:43:48,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 587 places, 581 transitions, 8575 flow [2024-06-21 20:43:48,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:43:48,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:43:48,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 145 transitions. [2024-06-21 20:43:48,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3776041666666667 [2024-06-21 20:43:48,678 INFO L175 Difference]: Start difference. First operand has 576 places, 561 transitions, 7201 flow. Second operand 12 states and 145 transitions. [2024-06-21 20:43:48,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 587 places, 581 transitions, 8575 flow [2024-06-21 20:43:50,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 577 places, 581 transitions, 8398 flow, removed 23 selfloop flow, removed 10 redundant places. [2024-06-21 20:43:50,642 INFO L231 Difference]: Finished difference. Result has 578 places, 563 transitions, 7317 flow [2024-06-21 20:43:50,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=7024, PETRI_DIFFERENCE_MINUEND_PLACES=566, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7317, PETRI_PLACES=578, PETRI_TRANSITIONS=563} [2024-06-21 20:43:50,643 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 547 predicate places. [2024-06-21 20:43:50,643 INFO L495 AbstractCegarLoop]: Abstraction has has 578 places, 563 transitions, 7317 flow [2024-06-21 20:43:50,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:50,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:50,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:50,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-21 20:43:50,643 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:43:50,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:50,643 INFO L85 PathProgramCache]: Analyzing trace with hash -92846932, now seen corresponding path program 26 times [2024-06-21 20:43:50,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:50,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246566419] [2024-06-21 20:43:50,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:50,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:50,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:51,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:51,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:51,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246566419] [2024-06-21 20:43:51,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246566419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:51,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:51,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:43:51,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560705716] [2024-06-21 20:43:51,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:51,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:43:51,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:51,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:43:51,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:43:51,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:43:51,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 578 places, 563 transitions, 7317 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:51,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:51,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:43:51,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:52,768 INFO L124 PetriNetUnfolderBase]: 1395/2514 cut-off events. [2024-06-21 20:43:52,768 INFO L125 PetriNetUnfolderBase]: For 410808/410808 co-relation queries the response was YES. [2024-06-21 20:43:52,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19151 conditions, 2514 events. 1395/2514 cut-off events. For 410808/410808 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 16062 event pairs, 253 based on Foata normal form. 2/2515 useless extension candidates. Maximal degree in co-relation 18914. Up to 2210 conditions per place. [2024-06-21 20:43:52,803 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 514 selfloop transitions, 72 changer transitions 0/588 dead transitions. [2024-06-21 20:43:52,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 588 transitions, 9259 flow [2024-06-21 20:43:52,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:43:52,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:43:52,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 156 transitions. [2024-06-21 20:43:52,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 20:43:52,805 INFO L175 Difference]: Start difference. First operand has 578 places, 563 transitions, 7317 flow. Second operand 13 states and 156 transitions. [2024-06-21 20:43:52,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 588 transitions, 9259 flow [2024-06-21 20:43:54,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 581 places, 588 transitions, 8987 flow, removed 80 selfloop flow, removed 9 redundant places. [2024-06-21 20:43:54,937 INFO L231 Difference]: Finished difference. Result has 582 places, 567 transitions, 7534 flow [2024-06-21 20:43:54,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=7045, PETRI_DIFFERENCE_MINUEND_PLACES=569, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7534, PETRI_PLACES=582, PETRI_TRANSITIONS=567} [2024-06-21 20:43:54,938 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 551 predicate places. [2024-06-21 20:43:54,938 INFO L495 AbstractCegarLoop]: Abstraction has has 582 places, 567 transitions, 7534 flow [2024-06-21 20:43:54,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:54,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:54,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:54,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-21 20:43:54,938 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:43:54,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:54,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1626298810, now seen corresponding path program 27 times [2024-06-21 20:43:54,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:54,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091763008] [2024-06-21 20:43:54,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:54,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:54,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:43:56,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:43:56,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:43:56,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091763008] [2024-06-21 20:43:56,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091763008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:43:56,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:43:56,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:43:56,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275047028] [2024-06-21 20:43:56,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:43:56,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:43:56,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:43:56,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:43:56,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:43:56,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:43:56,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 582 places, 567 transitions, 7534 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:56,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:43:56,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:43:56,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:43:57,269 INFO L124 PetriNetUnfolderBase]: 1413/2544 cut-off events. [2024-06-21 20:43:57,269 INFO L125 PetriNetUnfolderBase]: For 416596/416596 co-relation queries the response was YES. [2024-06-21 20:43:57,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19432 conditions, 2544 events. 1413/2544 cut-off events. For 416596/416596 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 16243 event pairs, 254 based on Foata normal form. 2/2545 useless extension candidates. Maximal degree in co-relation 19194. Up to 2268 conditions per place. [2024-06-21 20:43:57,306 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 524 selfloop transitions, 65 changer transitions 0/591 dead transitions. [2024-06-21 20:43:57,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 593 places, 591 transitions, 9000 flow [2024-06-21 20:43:57,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:43:57,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:43:57,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 144 transitions. [2024-06-21 20:43:57,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 20:43:57,307 INFO L175 Difference]: Start difference. First operand has 582 places, 567 transitions, 7534 flow. Second operand 12 states and 144 transitions. [2024-06-21 20:43:57,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 593 places, 591 transitions, 9000 flow [2024-06-21 20:43:59,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 584 places, 591 transitions, 8728 flow, removed 95 selfloop flow, removed 9 redundant places. [2024-06-21 20:43:59,245 INFO L231 Difference]: Finished difference. Result has 585 places, 573 transitions, 7637 flow [2024-06-21 20:43:59,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=7266, PETRI_DIFFERENCE_MINUEND_PLACES=573, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7637, PETRI_PLACES=585, PETRI_TRANSITIONS=573} [2024-06-21 20:43:59,246 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 554 predicate places. [2024-06-21 20:43:59,246 INFO L495 AbstractCegarLoop]: Abstraction has has 585 places, 573 transitions, 7637 flow [2024-06-21 20:43:59,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:43:59,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:43:59,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:43:59,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-21 20:43:59,247 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:43:59,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:43:59,247 INFO L85 PathProgramCache]: Analyzing trace with hash -2120574020, now seen corresponding path program 28 times [2024-06-21 20:43:59,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:43:59,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786183968] [2024-06-21 20:43:59,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:43:59,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:43:59,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:00,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:00,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:00,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786183968] [2024-06-21 20:44:00,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786183968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:00,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:00,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:44:00,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258683038] [2024-06-21 20:44:00,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:00,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:44:00,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:00,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:44:00,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:44:00,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:44:00,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 585 places, 573 transitions, 7637 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:00,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:00,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:44:00,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:01,757 INFO L124 PetriNetUnfolderBase]: 1431/2574 cut-off events. [2024-06-21 20:44:01,757 INFO L125 PetriNetUnfolderBase]: For 419047/419047 co-relation queries the response was YES. [2024-06-21 20:44:01,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19729 conditions, 2574 events. 1431/2574 cut-off events. For 419047/419047 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 16469 event pairs, 268 based on Foata normal form. 2/2575 useless extension candidates. Maximal degree in co-relation 19489. Up to 2435 conditions per place. [2024-06-21 20:44:01,798 INFO L140 encePairwiseOnDemand]: 18/32 looper letters, 556 selfloop transitions, 38 changer transitions 0/596 dead transitions. [2024-06-21 20:44:01,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 596 places, 596 transitions, 9117 flow [2024-06-21 20:44:01,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:44:01,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:44:01,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 137 transitions. [2024-06-21 20:44:01,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3567708333333333 [2024-06-21 20:44:01,799 INFO L175 Difference]: Start difference. First operand has 585 places, 573 transitions, 7637 flow. Second operand 12 states and 137 transitions. [2024-06-21 20:44:01,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 596 places, 596 transitions, 9117 flow [2024-06-21 20:44:03,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 589 places, 596 transitions, 8827 flow, removed 86 selfloop flow, removed 7 redundant places. [2024-06-21 20:44:03,931 INFO L231 Difference]: Finished difference. Result has 590 places, 579 transitions, 7676 flow [2024-06-21 20:44:03,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=7355, PETRI_DIFFERENCE_MINUEND_PLACES=578, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7676, PETRI_PLACES=590, PETRI_TRANSITIONS=579} [2024-06-21 20:44:03,931 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 559 predicate places. [2024-06-21 20:44:03,931 INFO L495 AbstractCegarLoop]: Abstraction has has 590 places, 579 transitions, 7676 flow [2024-06-21 20:44:03,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:03,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:03,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:03,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-21 20:44:03,932 INFO L420 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:44:03,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:03,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1986273210, now seen corresponding path program 25 times [2024-06-21 20:44:03,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:03,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271741839] [2024-06-21 20:44:03,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:03,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:03,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:05,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:05,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:05,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271741839] [2024-06-21 20:44:05,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271741839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:05,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:05,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:44:05,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021577862] [2024-06-21 20:44:05,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:05,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:44:05,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:05,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:44:05,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:44:05,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:44:05,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 590 places, 579 transitions, 7676 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:05,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:05,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:44:05,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:06,023 INFO L124 PetriNetUnfolderBase]: 1442/2595 cut-off events. [2024-06-21 20:44:06,023 INFO L125 PetriNetUnfolderBase]: For 456738/456738 co-relation queries the response was YES. [2024-06-21 20:44:06,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20111 conditions, 2595 events. 1442/2595 cut-off events. For 456738/456738 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 16627 event pairs, 276 based on Foata normal form. 2/2596 useless extension candidates. Maximal degree in co-relation 19870. Up to 2497 conditions per place. [2024-06-21 20:44:06,068 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 568 selfloop transitions, 27 changer transitions 0/597 dead transitions. [2024-06-21 20:44:06,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 600 places, 597 transitions, 9386 flow [2024-06-21 20:44:06,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:44:06,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:44:06,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 124 transitions. [2024-06-21 20:44:06,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3522727272727273 [2024-06-21 20:44:06,069 INFO L175 Difference]: Start difference. First operand has 590 places, 579 transitions, 7676 flow. Second operand 11 states and 124 transitions. [2024-06-21 20:44:06,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 600 places, 597 transitions, 9386 flow [2024-06-21 20:44:08,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 592 places, 597 transitions, 9095 flow, removed 88 selfloop flow, removed 8 redundant places. [2024-06-21 20:44:08,644 INFO L231 Difference]: Finished difference. Result has 593 places, 581 transitions, 7545 flow [2024-06-21 20:44:08,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=7385, PETRI_DIFFERENCE_MINUEND_PLACES=582, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7545, PETRI_PLACES=593, PETRI_TRANSITIONS=581} [2024-06-21 20:44:08,644 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 562 predicate places. [2024-06-21 20:44:08,644 INFO L495 AbstractCegarLoop]: Abstraction has has 593 places, 581 transitions, 7545 flow [2024-06-21 20:44:08,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:08,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:08,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:08,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-21 20:44:08,645 INFO L420 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:44:08,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:08,645 INFO L85 PathProgramCache]: Analyzing trace with hash 976552364, now seen corresponding path program 26 times [2024-06-21 20:44:08,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:08,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842552049] [2024-06-21 20:44:08,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:08,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:08,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:09,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:09,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:09,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842552049] [2024-06-21 20:44:09,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842552049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:09,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:09,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:44:09,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813505497] [2024-06-21 20:44:09,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:09,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:44:09,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:09,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:44:09,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:44:09,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:44:09,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 593 places, 581 transitions, 7545 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:09,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:09,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:44:09,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:10,858 INFO L124 PetriNetUnfolderBase]: 1446/2603 cut-off events. [2024-06-21 20:44:10,859 INFO L125 PetriNetUnfolderBase]: For 456036/456036 co-relation queries the response was YES. [2024-06-21 20:44:10,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19977 conditions, 2603 events. 1446/2603 cut-off events. For 456036/456036 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 16679 event pairs, 285 based on Foata normal form. 2/2604 useless extension candidates. Maximal degree in co-relation 19735. Up to 2540 conditions per place. [2024-06-21 20:44:10,904 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 569 selfloop transitions, 25 changer transitions 0/596 dead transitions. [2024-06-21 20:44:10,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 603 places, 596 transitions, 8821 flow [2024-06-21 20:44:10,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:44:10,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:44:10,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 119 transitions. [2024-06-21 20:44:10,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3380681818181818 [2024-06-21 20:44:10,906 INFO L175 Difference]: Start difference. First operand has 593 places, 581 transitions, 7545 flow. Second operand 11 states and 119 transitions. [2024-06-21 20:44:10,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 603 places, 596 transitions, 8821 flow [2024-06-21 20:44:13,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 596 places, 596 transitions, 8732 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-21 20:44:13,352 INFO L231 Difference]: Finished difference. Result has 597 places, 582 transitions, 7565 flow [2024-06-21 20:44:13,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=7456, PETRI_DIFFERENCE_MINUEND_PLACES=586, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7565, PETRI_PLACES=597, PETRI_TRANSITIONS=582} [2024-06-21 20:44:13,353 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 566 predicate places. [2024-06-21 20:44:13,353 INFO L495 AbstractCegarLoop]: Abstraction has has 597 places, 582 transitions, 7565 flow [2024-06-21 20:44:13,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:13,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:13,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:13,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-21 20:44:13,353 INFO L420 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:44:13,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:13,354 INFO L85 PathProgramCache]: Analyzing trace with hash -2127715924, now seen corresponding path program 27 times [2024-06-21 20:44:13,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:13,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45116253] [2024-06-21 20:44:13,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:13,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:13,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:14,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:14,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:14,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45116253] [2024-06-21 20:44:14,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45116253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:14,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:14,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:44:14,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237961127] [2024-06-21 20:44:14,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:14,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:44:14,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:14,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:44:14,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:44:14,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:44:14,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 597 places, 582 transitions, 7565 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:14,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:14,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:44:14,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:15,383 INFO L124 PetriNetUnfolderBase]: 1443/2598 cut-off events. [2024-06-21 20:44:15,383 INFO L125 PetriNetUnfolderBase]: For 423621/423621 co-relation queries the response was YES. [2024-06-21 20:44:15,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19490 conditions, 2598 events. 1443/2598 cut-off events. For 423621/423621 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 16691 event pairs, 277 based on Foata normal form. 2/2599 useless extension candidates. Maximal degree in co-relation 19246. Up to 2523 conditions per place. [2024-06-21 20:44:15,429 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 569 selfloop transitions, 26 changer transitions 0/597 dead transitions. [2024-06-21 20:44:15,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 607 places, 597 transitions, 8795 flow [2024-06-21 20:44:15,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:44:15,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:44:15,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2024-06-21 20:44:15,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3465909090909091 [2024-06-21 20:44:15,430 INFO L175 Difference]: Start difference. First operand has 597 places, 582 transitions, 7565 flow. Second operand 11 states and 122 transitions. [2024-06-21 20:44:15,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 607 places, 597 transitions, 8795 flow [2024-06-21 20:44:18,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 598 places, 597 transitions, 8662 flow, removed 43 selfloop flow, removed 9 redundant places. [2024-06-21 20:44:18,048 INFO L231 Difference]: Finished difference. Result has 599 places, 582 transitions, 7488 flow [2024-06-21 20:44:18,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=7432, PETRI_DIFFERENCE_MINUEND_PLACES=588, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7488, PETRI_PLACES=599, PETRI_TRANSITIONS=582} [2024-06-21 20:44:18,048 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 568 predicate places. [2024-06-21 20:44:18,048 INFO L495 AbstractCegarLoop]: Abstraction has has 599 places, 582 transitions, 7488 flow [2024-06-21 20:44:18,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:18,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:18,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:18,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-21 20:44:18,049 INFO L420 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:44:18,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:18,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1390254270, now seen corresponding path program 28 times [2024-06-21 20:44:18,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:18,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732299204] [2024-06-21 20:44:18,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:18,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:18,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:19,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:19,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:19,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732299204] [2024-06-21 20:44:19,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732299204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:19,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:19,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:44:19,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247802923] [2024-06-21 20:44:19,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:19,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:44:19,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:19,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:44:19,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:44:19,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:44:19,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 599 places, 582 transitions, 7488 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:19,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:19,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:44:19,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:20,136 INFO L124 PetriNetUnfolderBase]: 1447/2606 cut-off events. [2024-06-21 20:44:20,136 INFO L125 PetriNetUnfolderBase]: For 426864/426864 co-relation queries the response was YES. [2024-06-21 20:44:20,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19475 conditions, 2606 events. 1447/2606 cut-off events. For 426864/426864 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 16732 event pairs, 285 based on Foata normal form. 2/2607 useless extension candidates. Maximal degree in co-relation 19230. Up to 2552 conditions per place. [2024-06-21 20:44:20,182 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 579 selfloop transitions, 16 changer transitions 0/597 dead transitions. [2024-06-21 20:44:20,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 609 places, 597 transitions, 8762 flow [2024-06-21 20:44:20,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:44:20,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:44:20,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 115 transitions. [2024-06-21 20:44:20,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32670454545454547 [2024-06-21 20:44:20,183 INFO L175 Difference]: Start difference. First operand has 599 places, 582 transitions, 7488 flow. Second operand 11 states and 115 transitions. [2024-06-21 20:44:20,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 609 places, 597 transitions, 8762 flow [2024-06-21 20:44:22,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 598 places, 597 transitions, 8691 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-06-21 20:44:22,775 INFO L231 Difference]: Finished difference. Result has 599 places, 583 transitions, 7509 flow [2024-06-21 20:44:22,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=7417, PETRI_DIFFERENCE_MINUEND_PLACES=588, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7509, PETRI_PLACES=599, PETRI_TRANSITIONS=583} [2024-06-21 20:44:22,776 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 568 predicate places. [2024-06-21 20:44:22,776 INFO L495 AbstractCegarLoop]: Abstraction has has 599 places, 583 transitions, 7509 flow [2024-06-21 20:44:22,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:22,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:22,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:22,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2024-06-21 20:44:22,776 INFO L420 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:44:22,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:22,777 INFO L85 PathProgramCache]: Analyzing trace with hash 976561664, now seen corresponding path program 29 times [2024-06-21 20:44:22,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:22,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488243466] [2024-06-21 20:44:22,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:22,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:22,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:23,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:23,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:23,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488243466] [2024-06-21 20:44:23,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488243466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:23,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:23,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:44:23,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504761034] [2024-06-21 20:44:23,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:23,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:44:23,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:23,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:44:23,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:44:23,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:44:23,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 599 places, 583 transitions, 7509 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:23,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:23,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:44:23,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:24,859 INFO L124 PetriNetUnfolderBase]: 1451/2614 cut-off events. [2024-06-21 20:44:24,859 INFO L125 PetriNetUnfolderBase]: For 432639/432639 co-relation queries the response was YES. [2024-06-21 20:44:24,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19584 conditions, 2614 events. 1451/2614 cut-off events. For 432639/432639 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 16825 event pairs, 284 based on Foata normal form. 2/2615 useless extension candidates. Maximal degree in co-relation 19338. Up to 2535 conditions per place. [2024-06-21 20:44:24,905 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 571 selfloop transitions, 25 changer transitions 0/598 dead transitions. [2024-06-21 20:44:24,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 609 places, 598 transitions, 8791 flow [2024-06-21 20:44:24,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:44:24,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:44:24,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 120 transitions. [2024-06-21 20:44:24,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3409090909090909 [2024-06-21 20:44:24,909 INFO L175 Difference]: Start difference. First operand has 599 places, 583 transitions, 7509 flow. Second operand 11 states and 120 transitions. [2024-06-21 20:44:24,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 609 places, 598 transitions, 8791 flow [2024-06-21 20:44:27,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 600 places, 598 transitions, 8709 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-21 20:44:27,371 INFO L231 Difference]: Finished difference. Result has 601 places, 584 transitions, 7539 flow [2024-06-21 20:44:27,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=7427, PETRI_DIFFERENCE_MINUEND_PLACES=590, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7539, PETRI_PLACES=601, PETRI_TRANSITIONS=584} [2024-06-21 20:44:27,372 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 570 predicate places. [2024-06-21 20:44:27,372 INFO L495 AbstractCegarLoop]: Abstraction has has 601 places, 584 transitions, 7539 flow [2024-06-21 20:44:27,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:27,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:27,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:27,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2024-06-21 20:44:27,372 INFO L420 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:44:27,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:27,372 INFO L85 PathProgramCache]: Analyzing trace with hash 173392104, now seen corresponding path program 30 times [2024-06-21 20:44:27,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:27,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379687224] [2024-06-21 20:44:27,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:27,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:27,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:28,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:28,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:28,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379687224] [2024-06-21 20:44:28,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379687224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:28,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:28,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:44:28,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75838343] [2024-06-21 20:44:28,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:28,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:44:28,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:28,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:44:28,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:44:28,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:44:28,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 601 places, 584 transitions, 7539 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:28,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:28,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:44:28,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:29,778 INFO L124 PetriNetUnfolderBase]: 1462/2635 cut-off events. [2024-06-21 20:44:29,779 INFO L125 PetriNetUnfolderBase]: For 475731/475731 co-relation queries the response was YES. [2024-06-21 20:44:29,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20247 conditions, 2635 events. 1462/2635 cut-off events. For 475731/475731 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 17003 event pairs, 277 based on Foata normal form. 2/2636 useless extension candidates. Maximal degree in co-relation 20000. Up to 2347 conditions per place. [2024-06-21 20:44:29,827 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 537 selfloop transitions, 63 changer transitions 0/602 dead transitions. [2024-06-21 20:44:29,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 611 places, 602 transitions, 9283 flow [2024-06-21 20:44:29,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:44:29,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:44:29,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-06-21 20:44:29,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3693181818181818 [2024-06-21 20:44:29,828 INFO L175 Difference]: Start difference. First operand has 601 places, 584 transitions, 7539 flow. Second operand 11 states and 130 transitions. [2024-06-21 20:44:29,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 611 places, 602 transitions, 9283 flow [2024-06-21 20:44:32,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 602 places, 602 transitions, 9181 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-21 20:44:32,390 INFO L231 Difference]: Finished difference. Result has 603 places, 586 transitions, 7685 flow [2024-06-21 20:44:32,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=7437, PETRI_DIFFERENCE_MINUEND_PLACES=592, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7685, PETRI_PLACES=603, PETRI_TRANSITIONS=586} [2024-06-21 20:44:32,391 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 572 predicate places. [2024-06-21 20:44:32,391 INFO L495 AbstractCegarLoop]: Abstraction has has 603 places, 586 transitions, 7685 flow [2024-06-21 20:44:32,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:32,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:32,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:32,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2024-06-21 20:44:32,392 INFO L420 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:44:32,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:32,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1993901566, now seen corresponding path program 29 times [2024-06-21 20:44:32,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:32,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453601839] [2024-06-21 20:44:32,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:32,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:32,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:33,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:33,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:33,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453601839] [2024-06-21 20:44:33,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453601839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:33,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:33,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:44:33,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547430002] [2024-06-21 20:44:33,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:33,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:44:33,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:33,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:44:33,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:44:33,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:44:33,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 603 places, 586 transitions, 7685 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:33,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:33,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:44:33,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:34,446 INFO L124 PetriNetUnfolderBase]: 1474/2655 cut-off events. [2024-06-21 20:44:34,446 INFO L125 PetriNetUnfolderBase]: For 485603/485603 co-relation queries the response was YES. [2024-06-21 20:44:34,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20650 conditions, 2655 events. 1474/2655 cut-off events. For 485603/485603 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 17167 event pairs, 285 based on Foata normal form. 2/2656 useless extension candidates. Maximal degree in co-relation 20402. Up to 2545 conditions per place. [2024-06-21 20:44:34,497 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 569 selfloop transitions, 36 changer transitions 0/607 dead transitions. [2024-06-21 20:44:34,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 607 transitions, 9151 flow [2024-06-21 20:44:34,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:44:34,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:44:34,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 134 transitions. [2024-06-21 20:44:34,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3489583333333333 [2024-06-21 20:44:34,498 INFO L175 Difference]: Start difference. First operand has 603 places, 586 transitions, 7685 flow. Second operand 12 states and 134 transitions. [2024-06-21 20:44:34,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 607 transitions, 9151 flow [2024-06-21 20:44:37,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 607 places, 607 transitions, 9015 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-21 20:44:37,168 INFO L231 Difference]: Finished difference. Result has 608 places, 590 transitions, 7838 flow [2024-06-21 20:44:37,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=7549, PETRI_DIFFERENCE_MINUEND_PLACES=596, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7838, PETRI_PLACES=608, PETRI_TRANSITIONS=590} [2024-06-21 20:44:37,168 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 577 predicate places. [2024-06-21 20:44:37,168 INFO L495 AbstractCegarLoop]: Abstraction has has 608 places, 590 transitions, 7838 flow [2024-06-21 20:44:37,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:37,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:37,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:37,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2024-06-21 20:44:37,169 INFO L420 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:44:37,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:37,169 INFO L85 PathProgramCache]: Analyzing trace with hash 163860968, now seen corresponding path program 30 times [2024-06-21 20:44:37,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:37,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038541919] [2024-06-21 20:44:37,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:37,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:37,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:38,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:38,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:38,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038541919] [2024-06-21 20:44:38,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038541919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:38,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:38,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:44:38,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989802064] [2024-06-21 20:44:38,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:38,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:44:38,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:38,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:44:38,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:44:38,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:44:38,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 608 places, 590 transitions, 7838 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:38,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:38,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:44:38,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:39,561 INFO L124 PetriNetUnfolderBase]: 1470/2649 cut-off events. [2024-06-21 20:44:39,561 INFO L125 PetriNetUnfolderBase]: For 450574/450574 co-relation queries the response was YES. [2024-06-21 20:44:39,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20096 conditions, 2649 events. 1470/2649 cut-off events. For 450574/450574 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 17141 event pairs, 276 based on Foata normal form. 2/2650 useless extension candidates. Maximal degree in co-relation 19846. Up to 2361 conditions per place. [2024-06-21 20:44:39,612 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 530 selfloop transitions, 75 changer transitions 0/607 dead transitions. [2024-06-21 20:44:39,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 619 places, 607 transitions, 9096 flow [2024-06-21 20:44:39,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:44:39,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:44:39,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 142 transitions. [2024-06-21 20:44:39,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3697916666666667 [2024-06-21 20:44:39,613 INFO L175 Difference]: Start difference. First operand has 608 places, 590 transitions, 7838 flow. Second operand 12 states and 142 transitions. [2024-06-21 20:44:39,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 619 places, 607 transitions, 9096 flow [2024-06-21 20:44:42,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 610 places, 607 transitions, 8731 flow, removed 149 selfloop flow, removed 9 redundant places. [2024-06-21 20:44:42,301 INFO L231 Difference]: Finished difference. Result has 611 places, 590 transitions, 7628 flow [2024-06-21 20:44:42,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=7473, PETRI_DIFFERENCE_MINUEND_PLACES=599, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7628, PETRI_PLACES=611, PETRI_TRANSITIONS=590} [2024-06-21 20:44:42,301 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 580 predicate places. [2024-06-21 20:44:42,301 INFO L495 AbstractCegarLoop]: Abstraction has has 611 places, 590 transitions, 7628 flow [2024-06-21 20:44:42,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:42,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:42,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:42,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2024-06-21 20:44:42,302 INFO L420 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:44:42,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:42,302 INFO L85 PathProgramCache]: Analyzing trace with hash -92847087, now seen corresponding path program 20 times [2024-06-21 20:44:42,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:42,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61911148] [2024-06-21 20:44:42,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:42,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:42,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:43,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:43,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:43,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61911148] [2024-06-21 20:44:43,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61911148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:43,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:43,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:44:43,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150176962] [2024-06-21 20:44:43,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:43,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:44:43,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:43,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:44:43,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:44:43,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:44:43,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 611 places, 590 transitions, 7628 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:43,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:43,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:44:43,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:44,305 INFO L124 PetriNetUnfolderBase]: 1494/2701 cut-off events. [2024-06-21 20:44:44,305 INFO L125 PetriNetUnfolderBase]: For 676233/676233 co-relation queries the response was YES. [2024-06-21 20:44:44,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20365 conditions, 2701 events. 1494/2701 cut-off events. For 676233/676233 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 17483 event pairs, 276 based on Foata normal form. 14/2714 useless extension candidates. Maximal degree in co-relation 20114. Up to 2304 conditions per place. [2024-06-21 20:44:44,357 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 524 selfloop transitions, 61 changer transitions 27/614 dead transitions. [2024-06-21 20:44:44,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 622 places, 614 transitions, 9166 flow [2024-06-21 20:44:44,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:44:44,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:44:44,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 149 transitions. [2024-06-21 20:44:44,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3880208333333333 [2024-06-21 20:44:44,358 INFO L175 Difference]: Start difference. First operand has 611 places, 590 transitions, 7628 flow. Second operand 12 states and 149 transitions. [2024-06-21 20:44:44,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 622 places, 614 transitions, 9166 flow [2024-06-21 20:44:47,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 610 places, 614 transitions, 8984 flow, removed 12 selfloop flow, removed 12 redundant places. [2024-06-21 20:44:47,289 INFO L231 Difference]: Finished difference. Result has 611 places, 571 transitions, 7424 flow [2024-06-21 20:44:47,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=7446, PETRI_DIFFERENCE_MINUEND_PLACES=599, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7424, PETRI_PLACES=611, PETRI_TRANSITIONS=571} [2024-06-21 20:44:47,290 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 580 predicate places. [2024-06-21 20:44:47,290 INFO L495 AbstractCegarLoop]: Abstraction has has 611 places, 571 transitions, 7424 flow [2024-06-21 20:44:47,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:47,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:47,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:47,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2024-06-21 20:44:47,291 INFO L420 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:44:47,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:47,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1432359400, now seen corresponding path program 31 times [2024-06-21 20:44:47,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:47,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778367551] [2024-06-21 20:44:47,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:47,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:47,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:48,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:48,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:48,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778367551] [2024-06-21 20:44:48,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778367551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:48,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:48,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:44:48,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88211206] [2024-06-21 20:44:48,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:48,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:44:48,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:48,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:44:48,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:44:48,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:44:48,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 611 places, 571 transitions, 7424 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:48,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:48,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:44:48,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:49,497 INFO L124 PetriNetUnfolderBase]: 1424/2583 cut-off events. [2024-06-21 20:44:49,498 INFO L125 PetriNetUnfolderBase]: For 456529/456529 co-relation queries the response was YES. [2024-06-21 20:44:49,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19646 conditions, 2583 events. 1424/2583 cut-off events. For 456529/456529 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 16693 event pairs, 255 based on Foata normal form. 2/2584 useless extension candidates. Maximal degree in co-relation 19394. Up to 2321 conditions per place. [2024-06-21 20:44:49,545 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 518 selfloop transitions, 72 changer transitions 0/592 dead transitions. [2024-06-21 20:44:49,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 592 transitions, 8868 flow [2024-06-21 20:44:49,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:44:49,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:44:49,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 140 transitions. [2024-06-21 20:44:49,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3645833333333333 [2024-06-21 20:44:49,546 INFO L175 Difference]: Start difference. First operand has 611 places, 571 transitions, 7424 flow. Second operand 12 states and 140 transitions. [2024-06-21 20:44:49,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 592 transitions, 8868 flow [2024-06-21 20:44:52,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 600 places, 592 transitions, 8652 flow, removed 46 selfloop flow, removed 14 redundant places. [2024-06-21 20:44:52,047 INFO L231 Difference]: Finished difference. Result has 601 places, 575 transitions, 7577 flow [2024-06-21 20:44:52,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=7224, PETRI_DIFFERENCE_MINUEND_PLACES=589, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7577, PETRI_PLACES=601, PETRI_TRANSITIONS=575} [2024-06-21 20:44:52,047 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 570 predicate places. [2024-06-21 20:44:52,047 INFO L495 AbstractCegarLoop]: Abstraction has has 601 places, 575 transitions, 7577 flow [2024-06-21 20:44:52,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:52,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:52,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:52,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2024-06-21 20:44:52,048 INFO L420 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:44:52,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:52,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1400979030, now seen corresponding path program 31 times [2024-06-21 20:44:52,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:52,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770341823] [2024-06-21 20:44:52,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:52,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:52,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:53,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:53,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:53,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770341823] [2024-06-21 20:44:53,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770341823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:53,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:53,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:44:53,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478885147] [2024-06-21 20:44:53,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:53,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:44:53,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:53,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:44:53,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:44:53,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:44:53,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 601 places, 575 transitions, 7577 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:53,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:53,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:44:53,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:54,077 INFO L124 PetriNetUnfolderBase]: 1428/2591 cut-off events. [2024-06-21 20:44:54,077 INFO L125 PetriNetUnfolderBase]: For 442317/442317 co-relation queries the response was YES. [2024-06-21 20:44:54,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19567 conditions, 2591 events. 1428/2591 cut-off events. For 442317/442317 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 16772 event pairs, 284 based on Foata normal form. 2/2592 useless extension candidates. Maximal degree in co-relation 19318. Up to 2480 conditions per place. [2024-06-21 20:44:54,124 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 562 selfloop transitions, 26 changer transitions 0/590 dead transitions. [2024-06-21 20:44:54,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 611 places, 590 transitions, 8843 flow [2024-06-21 20:44:54,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:44:54,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:44:54,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 121 transitions. [2024-06-21 20:44:54,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34375 [2024-06-21 20:44:54,125 INFO L175 Difference]: Start difference. First operand has 601 places, 575 transitions, 7577 flow. Second operand 11 states and 121 transitions. [2024-06-21 20:44:54,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 611 places, 590 transitions, 8843 flow [2024-06-21 20:44:56,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 603 places, 590 transitions, 8546 flow, removed 84 selfloop flow, removed 8 redundant places. [2024-06-21 20:44:56,789 INFO L231 Difference]: Finished difference. Result has 604 places, 576 transitions, 7396 flow [2024-06-21 20:44:56,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=7280, PETRI_DIFFERENCE_MINUEND_PLACES=593, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7396, PETRI_PLACES=604, PETRI_TRANSITIONS=576} [2024-06-21 20:44:56,789 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 573 predicate places. [2024-06-21 20:44:56,789 INFO L495 AbstractCegarLoop]: Abstraction has has 604 places, 576 transitions, 7396 flow [2024-06-21 20:44:56,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:56,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:44:56,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:44:56,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2024-06-21 20:44:56,790 INFO L420 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:44:56,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:44:56,790 INFO L85 PathProgramCache]: Analyzing trace with hash 647946990, now seen corresponding path program 32 times [2024-06-21 20:44:56,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:44:56,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709787885] [2024-06-21 20:44:56,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:44:56,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:44:56,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:44:57,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:44:57,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:44:57,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709787885] [2024-06-21 20:44:57,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709787885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:44:57,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:44:57,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:44:57,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409468311] [2024-06-21 20:44:57,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:44:57,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:44:57,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:44:57,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:44:57,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:44:58,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:44:58,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 604 places, 576 transitions, 7396 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:44:58,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:44:58,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:44:58,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:44:59,082 INFO L124 PetriNetUnfolderBase]: 1432/2599 cut-off events. [2024-06-21 20:44:59,082 INFO L125 PetriNetUnfolderBase]: For 442972/442972 co-relation queries the response was YES. [2024-06-21 20:44:59,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19348 conditions, 2599 events. 1432/2599 cut-off events. For 442972/442972 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 16865 event pairs, 270 based on Foata normal form. 2/2600 useless extension candidates. Maximal degree in co-relation 19098. Up to 2429 conditions per place. [2024-06-21 20:44:59,128 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 543 selfloop transitions, 47 changer transitions 0/592 dead transitions. [2024-06-21 20:44:59,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 592 transitions, 8666 flow [2024-06-21 20:44:59,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:44:59,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:44:59,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2024-06-21 20:44:59,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36079545454545453 [2024-06-21 20:44:59,129 INFO L175 Difference]: Start difference. First operand has 604 places, 576 transitions, 7396 flow. Second operand 11 states and 127 transitions. [2024-06-21 20:44:59,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 592 transitions, 8666 flow [2024-06-21 20:45:01,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 605 places, 592 transitions, 8560 flow, removed 28 selfloop flow, removed 9 redundant places. [2024-06-21 20:45:01,823 INFO L231 Difference]: Finished difference. Result has 606 places, 577 transitions, 7440 flow [2024-06-21 20:45:01,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=7290, PETRI_DIFFERENCE_MINUEND_PLACES=595, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7440, PETRI_PLACES=606, PETRI_TRANSITIONS=577} [2024-06-21 20:45:01,824 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 575 predicate places. [2024-06-21 20:45:01,824 INFO L495 AbstractCegarLoop]: Abstraction has has 606 places, 577 transitions, 7440 flow [2024-06-21 20:45:01,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:01,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:01,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:01,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2024-06-21 20:45:01,824 INFO L420 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:45:01,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:01,825 INFO L85 PathProgramCache]: Analyzing trace with hash 446382944, now seen corresponding path program 32 times [2024-06-21 20:45:01,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:01,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315659167] [2024-06-21 20:45:01,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:01,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:01,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:02,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:02,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:02,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315659167] [2024-06-21 20:45:02,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315659167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:02,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:02,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:45:02,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17558940] [2024-06-21 20:45:02,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:02,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:45:02,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:02,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:45:02,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:45:02,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:45:02,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 606 places, 577 transitions, 7440 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:02,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:02,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:45:02,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:03,868 INFO L124 PetriNetUnfolderBase]: 1448/2625 cut-off events. [2024-06-21 20:45:03,869 INFO L125 PetriNetUnfolderBase]: For 495632/495632 co-relation queries the response was YES. [2024-06-21 20:45:03,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20437 conditions, 2625 events. 1448/2625 cut-off events. For 495632/495632 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 17039 event pairs, 256 based on Foata normal form. 2/2626 useless extension candidates. Maximal degree in co-relation 20186. Up to 2295 conditions per place. [2024-06-21 20:45:03,916 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 506 selfloop transitions, 92 changer transitions 0/600 dead transitions. [2024-06-21 20:45:03,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 617 places, 600 transitions, 9438 flow [2024-06-21 20:45:03,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:45:03,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:45:03,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 146 transitions. [2024-06-21 20:45:03,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3802083333333333 [2024-06-21 20:45:03,917 INFO L175 Difference]: Start difference. First operand has 606 places, 577 transitions, 7440 flow. Second operand 12 states and 146 transitions. [2024-06-21 20:45:03,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 617 places, 600 transitions, 9438 flow [2024-06-21 20:45:06,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 607 places, 600 transitions, 9279 flow, removed 23 selfloop flow, removed 10 redundant places. [2024-06-21 20:45:06,844 INFO L231 Difference]: Finished difference. Result has 608 places, 581 transitions, 7826 flow [2024-06-21 20:45:06,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=7281, PETRI_DIFFERENCE_MINUEND_PLACES=596, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7826, PETRI_PLACES=608, PETRI_TRANSITIONS=581} [2024-06-21 20:45:06,844 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 577 predicate places. [2024-06-21 20:45:06,844 INFO L495 AbstractCegarLoop]: Abstraction has has 608 places, 581 transitions, 7826 flow [2024-06-21 20:45:06,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:06,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:06,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:06,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2024-06-21 20:45:06,845 INFO L420 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:45:06,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:06,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1426645480, now seen corresponding path program 33 times [2024-06-21 20:45:06,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:06,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860755586] [2024-06-21 20:45:06,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:06,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:06,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:07,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:07,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:07,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860755586] [2024-06-21 20:45:07,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860755586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:07,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:07,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:45:07,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675627212] [2024-06-21 20:45:07,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:07,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:45:07,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:07,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:45:07,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:45:08,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:45:08,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 608 places, 581 transitions, 7826 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:08,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:08,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:45:08,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:09,211 INFO L124 PetriNetUnfolderBase]: 1464/2651 cut-off events. [2024-06-21 20:45:09,212 INFO L125 PetriNetUnfolderBase]: For 550222/550222 co-relation queries the response was YES. [2024-06-21 20:45:09,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21639 conditions, 2651 events. 1464/2651 cut-off events. For 550222/550222 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 17180 event pairs, 255 based on Foata normal form. 2/2652 useless extension candidates. Maximal degree in co-relation 21387. Up to 2278 conditions per place. [2024-06-21 20:45:09,262 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 498 selfloop transitions, 107 changer transitions 0/607 dead transitions. [2024-06-21 20:45:09,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 621 places, 607 transitions, 9856 flow [2024-06-21 20:45:09,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 20:45:09,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 20:45:09,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 163 transitions. [2024-06-21 20:45:09,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3638392857142857 [2024-06-21 20:45:09,264 INFO L175 Difference]: Start difference. First operand has 608 places, 581 transitions, 7826 flow. Second operand 14 states and 163 transitions. [2024-06-21 20:45:09,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 621 places, 607 transitions, 9856 flow [2024-06-21 20:45:12,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 612 places, 607 transitions, 9520 flow, removed 104 selfloop flow, removed 9 redundant places. [2024-06-21 20:45:12,471 INFO L231 Difference]: Finished difference. Result has 613 places, 585 transitions, 8074 flow [2024-06-21 20:45:12,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=7494, PETRI_DIFFERENCE_MINUEND_PLACES=599, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8074, PETRI_PLACES=613, PETRI_TRANSITIONS=585} [2024-06-21 20:45:12,471 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 582 predicate places. [2024-06-21 20:45:12,472 INFO L495 AbstractCegarLoop]: Abstraction has has 613 places, 585 transitions, 8074 flow [2024-06-21 20:45:12,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:12,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:12,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:12,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2024-06-21 20:45:12,472 INFO L420 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:45:12,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:12,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1633448650, now seen corresponding path program 34 times [2024-06-21 20:45:12,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:12,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594000168] [2024-06-21 20:45:12,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:12,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:12,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:13,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:13,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:13,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594000168] [2024-06-21 20:45:13,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594000168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:13,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:13,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:45:13,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726979606] [2024-06-21 20:45:13,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:13,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:45:13,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:13,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:45:13,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:45:13,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:45:13,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 613 places, 585 transitions, 8074 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:13,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:13,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:45:13,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:14,968 INFO L124 PetriNetUnfolderBase]: 1470/2661 cut-off events. [2024-06-21 20:45:14,968 INFO L125 PetriNetUnfolderBase]: For 555488/555488 co-relation queries the response was YES. [2024-06-21 20:45:15,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21819 conditions, 2661 events. 1470/2661 cut-off events. For 555488/555488 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 17267 event pairs, 263 based on Foata normal form. 2/2662 useless extension candidates. Maximal degree in co-relation 21566. Up to 2366 conditions per place. [2024-06-21 20:45:15,017 INFO L140 encePairwiseOnDemand]: 18/32 looper letters, 527 selfloop transitions, 75 changer transitions 0/604 dead transitions. [2024-06-21 20:45:15,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 624 places, 604 transitions, 9508 flow [2024-06-21 20:45:15,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:45:15,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:45:15,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 142 transitions. [2024-06-21 20:45:15,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3697916666666667 [2024-06-21 20:45:15,018 INFO L175 Difference]: Start difference. First operand has 613 places, 585 transitions, 8074 flow. Second operand 12 states and 142 transitions. [2024-06-21 20:45:15,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 624 places, 604 transitions, 9508 flow [2024-06-21 20:45:18,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 614 places, 604 transitions, 9161 flow, removed 113 selfloop flow, removed 10 redundant places. [2024-06-21 20:45:18,440 INFO L231 Difference]: Finished difference. Result has 615 places, 587 transitions, 8068 flow [2024-06-21 20:45:18,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=7751, PETRI_DIFFERENCE_MINUEND_PLACES=603, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8068, PETRI_PLACES=615, PETRI_TRANSITIONS=587} [2024-06-21 20:45:18,440 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 584 predicate places. [2024-06-21 20:45:18,440 INFO L495 AbstractCegarLoop]: Abstraction has has 615 places, 587 transitions, 8068 flow [2024-06-21 20:45:18,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:18,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:18,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:18,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2024-06-21 20:45:18,441 INFO L420 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:45:18,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:18,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1970583314, now seen corresponding path program 35 times [2024-06-21 20:45:18,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:18,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892647348] [2024-06-21 20:45:18,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:18,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:18,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:19,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:19,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:19,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892647348] [2024-06-21 20:45:19,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892647348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:19,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:19,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:45:19,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505517114] [2024-06-21 20:45:19,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:19,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:45:19,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:19,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:45:19,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:45:19,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:45:19,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 615 places, 587 transitions, 8068 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:19,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:19,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:45:19,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:20,686 INFO L124 PetriNetUnfolderBase]: 1476/2671 cut-off events. [2024-06-21 20:45:20,686 INFO L125 PetriNetUnfolderBase]: For 555502/555502 co-relation queries the response was YES. [2024-06-21 20:45:20,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21832 conditions, 2671 events. 1476/2671 cut-off events. For 555502/555502 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 17349 event pairs, 278 based on Foata normal form. 2/2672 useless extension candidates. Maximal degree in co-relation 21577. Up to 2528 conditions per place. [2024-06-21 20:45:20,734 INFO L140 encePairwiseOnDemand]: 18/32 looper letters, 562 selfloop transitions, 42 changer transitions 0/606 dead transitions. [2024-06-21 20:45:20,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 626 places, 606 transitions, 9486 flow [2024-06-21 20:45:20,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:45:20,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:45:20,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 136 transitions. [2024-06-21 20:45:20,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3541666666666667 [2024-06-21 20:45:20,735 INFO L175 Difference]: Start difference. First operand has 615 places, 587 transitions, 8068 flow. Second operand 12 states and 136 transitions. [2024-06-21 20:45:20,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 626 places, 606 transitions, 9486 flow [2024-06-21 20:45:24,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 615 places, 606 transitions, 9154 flow, removed 75 selfloop flow, removed 11 redundant places. [2024-06-21 20:45:24,131 INFO L231 Difference]: Finished difference. Result has 616 places, 589 transitions, 7991 flow [2024-06-21 20:45:24,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=7736, PETRI_DIFFERENCE_MINUEND_PLACES=604, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7991, PETRI_PLACES=616, PETRI_TRANSITIONS=589} [2024-06-21 20:45:24,131 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 585 predicate places. [2024-06-21 20:45:24,132 INFO L495 AbstractCegarLoop]: Abstraction has has 616 places, 589 transitions, 7991 flow [2024-06-21 20:45:24,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:24,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:24,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:24,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208 [2024-06-21 20:45:24,132 INFO L420 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:45:24,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:24,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1633725356, now seen corresponding path program 33 times [2024-06-21 20:45:24,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:24,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279619784] [2024-06-21 20:45:24,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:24,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:24,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:25,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:25,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:25,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279619784] [2024-06-21 20:45:25,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279619784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:25,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:25,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:45:25,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716298958] [2024-06-21 20:45:25,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:25,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:45:25,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:25,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:45:25,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:45:25,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:45:25,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 616 places, 589 transitions, 7991 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:25,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:25,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:45:25,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:26,360 INFO L124 PetriNetUnfolderBase]: 1473/2666 cut-off events. [2024-06-21 20:45:26,361 INFO L125 PetriNetUnfolderBase]: For 515448/515448 co-relation queries the response was YES. [2024-06-21 20:45:26,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21082 conditions, 2666 events. 1473/2666 cut-off events. For 515448/515448 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 17308 event pairs, 281 based on Foata normal form. 2/2667 useless extension candidates. Maximal degree in co-relation 20826. Up to 2470 conditions per place. [2024-06-21 20:45:26,435 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 552 selfloop transitions, 50 changer transitions 0/604 dead transitions. [2024-06-21 20:45:26,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 626 places, 604 transitions, 9233 flow [2024-06-21 20:45:26,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:45:26,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:45:26,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2024-06-21 20:45:26,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36079545454545453 [2024-06-21 20:45:26,437 INFO L175 Difference]: Start difference. First operand has 616 places, 589 transitions, 7991 flow. Second operand 11 states and 127 transitions. [2024-06-21 20:45:26,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 626 places, 604 transitions, 9233 flow [2024-06-21 20:45:29,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 617 places, 604 transitions, 8973 flow, removed 94 selfloop flow, removed 9 redundant places. [2024-06-21 20:45:29,643 INFO L231 Difference]: Finished difference. Result has 618 places, 589 transitions, 7835 flow [2024-06-21 20:45:29,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=7731, PETRI_DIFFERENCE_MINUEND_PLACES=607, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7835, PETRI_PLACES=618, PETRI_TRANSITIONS=589} [2024-06-21 20:45:29,643 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 587 predicate places. [2024-06-21 20:45:29,643 INFO L495 AbstractCegarLoop]: Abstraction has has 618 places, 589 transitions, 7835 flow [2024-06-21 20:45:29,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:29,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:29,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:29,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209 [2024-06-21 20:45:29,644 INFO L420 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:45:29,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:29,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1432151855, now seen corresponding path program 21 times [2024-06-21 20:45:29,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:29,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562592459] [2024-06-21 20:45:29,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:29,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:29,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:30,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:30,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:30,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562592459] [2024-06-21 20:45:30,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562592459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:30,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:30,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:45:30,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113007243] [2024-06-21 20:45:30,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:30,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:45:30,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:30,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:45:30,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:45:30,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:45:30,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 618 places, 589 transitions, 7835 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:30,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:30,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:45:30,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:31,682 INFO L124 PetriNetUnfolderBase]: 1493/2712 cut-off events. [2024-06-21 20:45:31,682 INFO L125 PetriNetUnfolderBase]: For 760706/760706 co-relation queries the response was YES. [2024-06-21 20:45:31,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20899 conditions, 2712 events. 1493/2712 cut-off events. For 760706/760706 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 17670 event pairs, 265 based on Foata normal form. 16/2727 useless extension candidates. Maximal degree in co-relation 20642. Up to 2373 conditions per place. [2024-06-21 20:45:31,730 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 528 selfloop transitions, 66 changer transitions 17/613 dead transitions. [2024-06-21 20:45:31,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 629 places, 613 transitions, 9367 flow [2024-06-21 20:45:31,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:45:31,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:45:31,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 148 transitions. [2024-06-21 20:45:31,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3854166666666667 [2024-06-21 20:45:31,731 INFO L175 Difference]: Start difference. First operand has 618 places, 589 transitions, 7835 flow. Second operand 12 states and 148 transitions. [2024-06-21 20:45:31,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 629 places, 613 transitions, 9367 flow [2024-06-21 20:45:34,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 618 places, 613 transitions, 9070 flow, removed 74 selfloop flow, removed 11 redundant places. [2024-06-21 20:45:34,534 INFO L231 Difference]: Finished difference. Result has 620 places, 580 transitions, 7617 flow [2024-06-21 20:45:34,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=7538, PETRI_DIFFERENCE_MINUEND_PLACES=607, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7617, PETRI_PLACES=620, PETRI_TRANSITIONS=580} [2024-06-21 20:45:34,534 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 589 predicate places. [2024-06-21 20:45:34,534 INFO L495 AbstractCegarLoop]: Abstraction has has 620 places, 580 transitions, 7617 flow [2024-06-21 20:45:34,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:34,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:34,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:34,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210 [2024-06-21 20:45:34,534 INFO L420 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:45:34,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:34,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1560665709, now seen corresponding path program 22 times [2024-06-21 20:45:34,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:34,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90434607] [2024-06-21 20:45:34,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:34,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:34,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:35,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:35,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:35,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90434607] [2024-06-21 20:45:35,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90434607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:35,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:35,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:45:35,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568014822] [2024-06-21 20:45:35,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:35,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:45:35,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:35,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:45:35,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:45:35,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:45:35,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 620 places, 580 transitions, 7617 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:35,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:35,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:45:35,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:36,580 INFO L124 PetriNetUnfolderBase]: 1447/2630 cut-off events. [2024-06-21 20:45:36,580 INFO L125 PetriNetUnfolderBase]: For 482357/482357 co-relation queries the response was YES. [2024-06-21 20:45:36,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20031 conditions, 2630 events. 1447/2630 cut-off events. For 482357/482357 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 17061 event pairs, 293 based on Foata normal form. 2/2631 useless extension candidates. Maximal degree in co-relation 19773. Up to 2492 conditions per place. [2024-06-21 20:45:36,628 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 536 selfloop transitions, 57 changer transitions 0/595 dead transitions. [2024-06-21 20:45:36,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 629 places, 595 transitions, 9309 flow [2024-06-21 20:45:36,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:45:36,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:45:36,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 132 transitions. [2024-06-21 20:45:36,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34375 [2024-06-21 20:45:36,629 INFO L175 Difference]: Start difference. First operand has 620 places, 580 transitions, 7617 flow. Second operand 12 states and 132 transitions. [2024-06-21 20:45:36,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 629 places, 595 transitions, 9309 flow [2024-06-21 20:45:39,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 614 places, 595 transitions, 9088 flow, removed 39 selfloop flow, removed 15 redundant places. [2024-06-21 20:45:39,368 INFO L231 Difference]: Finished difference. Result has 615 places, 581 transitions, 7584 flow [2024-06-21 20:45:39,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=7400, PETRI_DIFFERENCE_MINUEND_PLACES=603, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7584, PETRI_PLACES=615, PETRI_TRANSITIONS=581} [2024-06-21 20:45:39,368 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 584 predicate places. [2024-06-21 20:45:39,368 INFO L495 AbstractCegarLoop]: Abstraction has has 615 places, 581 transitions, 7584 flow [2024-06-21 20:45:39,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:39,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:39,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:39,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211 [2024-06-21 20:45:39,369 INFO L420 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:45:39,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:39,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1626097000, now seen corresponding path program 36 times [2024-06-21 20:45:39,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:39,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347733551] [2024-06-21 20:45:39,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:39,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:39,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:40,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:40,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:40,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347733551] [2024-06-21 20:45:40,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347733551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:40,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:40,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:45:40,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291717076] [2024-06-21 20:45:40,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:40,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:45:40,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:40,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:45:40,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:45:40,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:45:40,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 615 places, 581 transitions, 7584 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:40,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:40,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:45:40,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:41,681 INFO L124 PetriNetUnfolderBase]: 1453/2640 cut-off events. [2024-06-21 20:45:41,681 INFO L125 PetriNetUnfolderBase]: For 480464/480464 co-relation queries the response was YES. [2024-06-21 20:45:41,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20082 conditions, 2640 events. 1453/2640 cut-off events. For 480464/480464 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 17217 event pairs, 265 based on Foata normal form. 2/2641 useless extension candidates. Maximal degree in co-relation 19825. Up to 2392 conditions per place. [2024-06-21 20:45:41,730 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 537 selfloop transitions, 62 changer transitions 0/601 dead transitions. [2024-06-21 20:45:41,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 626 places, 601 transitions, 8996 flow [2024-06-21 20:45:41,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:45:41,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:45:41,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 143 transitions. [2024-06-21 20:45:41,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3723958333333333 [2024-06-21 20:45:41,732 INFO L175 Difference]: Start difference. First operand has 615 places, 581 transitions, 7584 flow. Second operand 12 states and 143 transitions. [2024-06-21 20:45:41,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 626 places, 601 transitions, 8996 flow [2024-06-21 20:45:44,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 614 places, 601 transitions, 8640 flow, removed 39 selfloop flow, removed 12 redundant places. [2024-06-21 20:45:44,516 INFO L231 Difference]: Finished difference. Result has 615 places, 583 transitions, 7523 flow [2024-06-21 20:45:44,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=7228, PETRI_DIFFERENCE_MINUEND_PLACES=603, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7523, PETRI_PLACES=615, PETRI_TRANSITIONS=583} [2024-06-21 20:45:44,516 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 584 predicate places. [2024-06-21 20:45:44,516 INFO L495 AbstractCegarLoop]: Abstraction has has 615 places, 583 transitions, 7523 flow [2024-06-21 20:45:44,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:44,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:44,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:44,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212 [2024-06-21 20:45:44,516 INFO L420 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:45:44,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:44,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1626091420, now seen corresponding path program 37 times [2024-06-21 20:45:44,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:44,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691642392] [2024-06-21 20:45:44,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:44,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:44,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:45,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:45,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:45,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691642392] [2024-06-21 20:45:45,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691642392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:45,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:45,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:45:45,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24192401] [2024-06-21 20:45:45,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:45,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:45:45,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:45,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:45:45,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:45:45,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:45:45,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 615 places, 583 transitions, 7523 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:45,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:45,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:45:45,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:46,545 INFO L124 PetriNetUnfolderBase]: 1459/2650 cut-off events. [2024-06-21 20:45:46,546 INFO L125 PetriNetUnfolderBase]: For 488077/488077 co-relation queries the response was YES. [2024-06-21 20:45:46,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19859 conditions, 2650 events. 1459/2650 cut-off events. For 488077/488077 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 17259 event pairs, 265 based on Foata normal form. 2/2651 useless extension candidates. Maximal degree in co-relation 19604. Up to 2377 conditions per place. [2024-06-21 20:45:46,597 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 533 selfloop transitions, 70 changer transitions 0/605 dead transitions. [2024-06-21 20:45:46,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 627 places, 605 transitions, 8953 flow [2024-06-21 20:45:46,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:45:46,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:45:46,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 154 transitions. [2024-06-21 20:45:46,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3701923076923077 [2024-06-21 20:45:46,598 INFO L175 Difference]: Start difference. First operand has 615 places, 583 transitions, 7523 flow. Second operand 13 states and 154 transitions. [2024-06-21 20:45:46,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 627 places, 605 transitions, 8953 flow [2024-06-21 20:45:49,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 616 places, 605 transitions, 8663 flow, removed 78 selfloop flow, removed 11 redundant places. [2024-06-21 20:45:49,369 INFO L231 Difference]: Finished difference. Result has 617 places, 585 transitions, 7548 flow [2024-06-21 20:45:49,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=7233, PETRI_DIFFERENCE_MINUEND_PLACES=604, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7548, PETRI_PLACES=617, PETRI_TRANSITIONS=585} [2024-06-21 20:45:49,369 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 586 predicate places. [2024-06-21 20:45:49,370 INFO L495 AbstractCegarLoop]: Abstraction has has 617 places, 585 transitions, 7548 flow [2024-06-21 20:45:49,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:49,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:49,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:49,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable213 [2024-06-21 20:45:49,370 INFO L420 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:45:49,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:49,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1626091265, now seen corresponding path program 23 times [2024-06-21 20:45:49,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:49,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008984509] [2024-06-21 20:45:49,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:49,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:49,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:50,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:50,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:50,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008984509] [2024-06-21 20:45:50,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008984509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:50,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:50,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:45:50,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846477097] [2024-06-21 20:45:50,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:50,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:45:50,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:50,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:45:50,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:45:50,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:45:50,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 617 places, 585 transitions, 7548 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:50,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:50,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:45:50,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:51,387 INFO L124 PetriNetUnfolderBase]: 1483/2702 cut-off events. [2024-06-21 20:45:51,387 INFO L125 PetriNetUnfolderBase]: For 739892/739892 co-relation queries the response was YES. [2024-06-21 20:45:51,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20221 conditions, 2702 events. 1483/2702 cut-off events. For 739892/739892 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 17621 event pairs, 269 based on Foata normal form. 14/2715 useless extension candidates. Maximal degree in co-relation 19965. Up to 2361 conditions per place. [2024-06-21 20:45:51,438 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 531 selfloop transitions, 54 changer transitions 22/609 dead transitions. [2024-06-21 20:45:51,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 628 places, 609 transitions, 9055 flow [2024-06-21 20:45:51,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:45:51,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:45:51,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 148 transitions. [2024-06-21 20:45:51,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3854166666666667 [2024-06-21 20:45:51,439 INFO L175 Difference]: Start difference. First operand has 617 places, 585 transitions, 7548 flow. Second operand 12 states and 148 transitions. [2024-06-21 20:45:51,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 628 places, 609 transitions, 9055 flow [2024-06-21 20:45:54,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 617 places, 609 transitions, 8760 flow, removed 79 selfloop flow, removed 11 redundant places. [2024-06-21 20:45:54,646 INFO L231 Difference]: Finished difference. Result has 618 places, 571 transitions, 7252 flow [2024-06-21 20:45:54,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=7253, PETRI_DIFFERENCE_MINUEND_PLACES=606, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7252, PETRI_PLACES=618, PETRI_TRANSITIONS=571} [2024-06-21 20:45:54,646 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 587 predicate places. [2024-06-21 20:45:54,647 INFO L495 AbstractCegarLoop]: Abstraction has has 618 places, 571 transitions, 7252 flow [2024-06-21 20:45:54,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:54,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:54,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:54,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214 [2024-06-21 20:45:54,647 INFO L420 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:45:54,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:54,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1426789475, now seen corresponding path program 24 times [2024-06-21 20:45:54,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:54,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972856661] [2024-06-21 20:45:54,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:54,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:54,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:45:55,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:45:55,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:45:55,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972856661] [2024-06-21 20:45:55,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972856661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:45:55,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:45:55,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:45:55,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853325455] [2024-06-21 20:45:55,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:45:55,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:45:55,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:45:55,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:45:55,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:45:55,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:45:55,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 618 places, 571 transitions, 7252 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:55,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:45:55,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:45:55,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:45:56,705 INFO L124 PetriNetUnfolderBase]: 1441/2640 cut-off events. [2024-06-21 20:45:56,705 INFO L125 PetriNetUnfolderBase]: For 742823/742823 co-relation queries the response was YES. [2024-06-21 20:45:56,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19634 conditions, 2640 events. 1441/2640 cut-off events. For 742823/742823 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 17253 event pairs, 261 based on Foata normal form. 14/2653 useless extension candidates. Maximal degree in co-relation 19377. Up to 2353 conditions per place. [2024-06-21 20:45:56,753 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 517 selfloop transitions, 64 changer transitions 12/595 dead transitions. [2024-06-21 20:45:56,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 623 places, 595 transitions, 8733 flow [2024-06-21 20:45:56,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:45:56,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:45:56,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 146 transitions. [2024-06-21 20:45:56,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3802083333333333 [2024-06-21 20:45:56,754 INFO L175 Difference]: Start difference. First operand has 618 places, 571 transitions, 7252 flow. Second operand 12 states and 146 transitions. [2024-06-21 20:45:56,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 623 places, 595 transitions, 8733 flow [2024-06-21 20:45:59,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 610 places, 595 transitions, 8551 flow, removed 38 selfloop flow, removed 13 redundant places. [2024-06-21 20:45:59,706 INFO L231 Difference]: Finished difference. Result has 611 places, 567 transitions, 7211 flow [2024-06-21 20:45:59,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=7074, PETRI_DIFFERENCE_MINUEND_PLACES=599, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7211, PETRI_PLACES=611, PETRI_TRANSITIONS=567} [2024-06-21 20:45:59,707 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 580 predicate places. [2024-06-21 20:45:59,707 INFO L495 AbstractCegarLoop]: Abstraction has has 611 places, 567 transitions, 7211 flow [2024-06-21 20:45:59,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:45:59,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:45:59,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:45:59,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215 [2024-06-21 20:45:59,707 INFO L420 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:45:59,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:45:59,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1053974040, now seen corresponding path program 38 times [2024-06-21 20:45:59,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:45:59,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061500435] [2024-06-21 20:45:59,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:45:59,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:45:59,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:00,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:46:00,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:00,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061500435] [2024-06-21 20:46:00,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061500435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:00,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:00,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:46:00,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945046990] [2024-06-21 20:46:00,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:00,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:46:00,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:00,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:46:00,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:46:00,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:46:00,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 611 places, 567 transitions, 7211 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:00,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:00,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:46:00,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:01,935 INFO L124 PetriNetUnfolderBase]: 1413/2584 cut-off events. [2024-06-21 20:46:01,935 INFO L125 PetriNetUnfolderBase]: For 483316/483316 co-relation queries the response was YES. [2024-06-21 20:46:01,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19182 conditions, 2584 events. 1413/2584 cut-off events. For 483316/483316 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 16851 event pairs, 282 based on Foata normal form. 2/2585 useless extension candidates. Maximal degree in co-relation 18927. Up to 2508 conditions per place. [2024-06-21 20:46:01,981 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 553 selfloop transitions, 30 changer transitions 0/585 dead transitions. [2024-06-21 20:46:01,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 621 places, 585 transitions, 8589 flow [2024-06-21 20:46:01,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:46:01,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:46:01,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 130 transitions. [2024-06-21 20:46:01,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3385416666666667 [2024-06-21 20:46:01,982 INFO L175 Difference]: Start difference. First operand has 611 places, 567 transitions, 7211 flow. Second operand 12 states and 130 transitions. [2024-06-21 20:46:01,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 621 places, 585 transitions, 8589 flow [2024-06-21 20:46:04,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 611 places, 585 transitions, 8411 flow, removed 26 selfloop flow, removed 10 redundant places. [2024-06-21 20:46:04,843 INFO L231 Difference]: Finished difference. Result has 612 places, 569 transitions, 7271 flow [2024-06-21 20:46:04,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=7033, PETRI_DIFFERENCE_MINUEND_PLACES=600, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7271, PETRI_PLACES=612, PETRI_TRANSITIONS=569} [2024-06-21 20:46:04,843 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 581 predicate places. [2024-06-21 20:46:04,843 INFO L495 AbstractCegarLoop]: Abstraction has has 612 places, 569 transitions, 7271 flow [2024-06-21 20:46:04,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:04,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:04,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:04,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216 [2024-06-21 20:46:04,844 INFO L420 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:46:04,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:04,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1704868798, now seen corresponding path program 34 times [2024-06-21 20:46:04,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:04,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416147171] [2024-06-21 20:46:04,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:04,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:04,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:06,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:46:06,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:06,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416147171] [2024-06-21 20:46:06,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416147171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:06,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:06,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:46:06,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498701318] [2024-06-21 20:46:06,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:06,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:46:06,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:06,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:46:06,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:46:06,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:46:06,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 612 places, 569 transitions, 7271 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:06,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:06,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:46:06,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:07,093 INFO L124 PetriNetUnfolderBase]: 1417/2592 cut-off events. [2024-06-21 20:46:07,093 INFO L125 PetriNetUnfolderBase]: For 488828/488828 co-relation queries the response was YES. [2024-06-21 20:46:07,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19172 conditions, 2592 events. 1417/2592 cut-off events. For 488828/488828 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 16928 event pairs, 276 based on Foata normal form. 2/2593 useless extension candidates. Maximal degree in co-relation 18916. Up to 2503 conditions per place. [2024-06-21 20:46:07,144 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 556 selfloop transitions, 26 changer transitions 0/584 dead transitions. [2024-06-21 20:46:07,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 622 places, 584 transitions, 8529 flow [2024-06-21 20:46:07,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:46:07,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:46:07,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-21 20:46:07,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3494318181818182 [2024-06-21 20:46:07,145 INFO L175 Difference]: Start difference. First operand has 612 places, 569 transitions, 7271 flow. Second operand 11 states and 123 transitions. [2024-06-21 20:46:07,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 622 places, 584 transitions, 8529 flow [2024-06-21 20:46:10,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 612 places, 584 transitions, 8309 flow, removed 82 selfloop flow, removed 10 redundant places. [2024-06-21 20:46:10,036 INFO L231 Difference]: Finished difference. Result has 613 places, 570 transitions, 7169 flow [2024-06-21 20:46:10,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=7051, PETRI_DIFFERENCE_MINUEND_PLACES=602, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7169, PETRI_PLACES=613, PETRI_TRANSITIONS=570} [2024-06-21 20:46:10,036 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 582 predicate places. [2024-06-21 20:46:10,036 INFO L495 AbstractCegarLoop]: Abstraction has has 613 places, 570 transitions, 7169 flow [2024-06-21 20:46:10,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:10,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:10,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:10,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217 [2024-06-21 20:46:10,036 INFO L420 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:46:10,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:10,037 INFO L85 PathProgramCache]: Analyzing trace with hash -2127931405, now seen corresponding path program 25 times [2024-06-21 20:46:10,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:10,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091181934] [2024-06-21 20:46:10,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:10,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:10,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:11,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:46:11,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:11,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091181934] [2024-06-21 20:46:11,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091181934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:11,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:11,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:46:11,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711545035] [2024-06-21 20:46:11,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:11,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:46:11,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:11,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:46:11,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:46:11,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:46:11,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 613 places, 570 transitions, 7169 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:11,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:11,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:46:11,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:12,252 INFO L124 PetriNetUnfolderBase]: 1440/2641 cut-off events. [2024-06-21 20:46:12,252 INFO L125 PetriNetUnfolderBase]: For 745391/745391 co-relation queries the response was YES. [2024-06-21 20:46:12,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19183 conditions, 2641 events. 1440/2641 cut-off events. For 745391/745391 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 17251 event pairs, 273 based on Foata normal form. 16/2656 useless extension candidates. Maximal degree in co-relation 18926. Up to 2422 conditions per place. [2024-06-21 20:46:12,300 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 540 selfloop transitions, 25 changer transitions 27/594 dead transitions. [2024-06-21 20:46:12,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 624 places, 594 transitions, 8747 flow [2024-06-21 20:46:12,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:46:12,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:46:12,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 140 transitions. [2024-06-21 20:46:12,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3645833333333333 [2024-06-21 20:46:12,301 INFO L175 Difference]: Start difference. First operand has 613 places, 570 transitions, 7169 flow. Second operand 12 states and 140 transitions. [2024-06-21 20:46:12,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 624 places, 594 transitions, 8747 flow [2024-06-21 20:46:15,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 615 places, 594 transitions, 8595 flow, removed 51 selfloop flow, removed 9 redundant places. [2024-06-21 20:46:15,090 INFO L231 Difference]: Finished difference. Result has 617 places, 552 transitions, 6846 flow [2024-06-21 20:46:15,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=7017, PETRI_DIFFERENCE_MINUEND_PLACES=604, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6846, PETRI_PLACES=617, PETRI_TRANSITIONS=552} [2024-06-21 20:46:15,090 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 586 predicate places. [2024-06-21 20:46:15,090 INFO L495 AbstractCegarLoop]: Abstraction has has 617 places, 552 transitions, 6846 flow [2024-06-21 20:46:15,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:15,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:15,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:15,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218 [2024-06-21 20:46:15,091 INFO L420 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:46:15,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:15,091 INFO L85 PathProgramCache]: Analyzing trace with hash -2127931250, now seen corresponding path program 39 times [2024-06-21 20:46:15,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:15,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082785140] [2024-06-21 20:46:15,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:15,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:15,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:16,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:46:16,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:16,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082785140] [2024-06-21 20:46:16,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082785140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:16,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:16,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:46:16,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956859261] [2024-06-21 20:46:16,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:16,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:46:16,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:16,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:46:16,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:46:16,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:46:16,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 617 places, 552 transitions, 6846 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:16,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:16,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:46:16,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:17,146 INFO L124 PetriNetUnfolderBase]: 1354/2497 cut-off events. [2024-06-21 20:46:17,147 INFO L125 PetriNetUnfolderBase]: For 406781/406781 co-relation queries the response was YES. [2024-06-21 20:46:17,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17176 conditions, 2497 events. 1354/2497 cut-off events. For 406781/406781 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 16326 event pairs, 268 based on Foata normal form. 2/2498 useless extension candidates. Maximal degree in co-relation 16917. Up to 2416 conditions per place. [2024-06-21 20:46:17,191 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 539 selfloop transitions, 26 changer transitions 0/567 dead transitions. [2024-06-21 20:46:17,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 622 places, 567 transitions, 8016 flow [2024-06-21 20:46:17,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:46:17,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:46:17,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 130 transitions. [2024-06-21 20:46:17,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3385416666666667 [2024-06-21 20:46:17,192 INFO L175 Difference]: Start difference. First operand has 617 places, 552 transitions, 6846 flow. Second operand 12 states and 130 transitions. [2024-06-21 20:46:17,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 622 places, 567 transitions, 8016 flow [2024-06-21 20:46:19,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 600 places, 567 transitions, 7538 flow, removed 76 selfloop flow, removed 22 redundant places. [2024-06-21 20:46:19,763 INFO L231 Difference]: Finished difference. Result has 601 places, 552 transitions, 6425 flow [2024-06-21 20:46:19,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6368, PETRI_DIFFERENCE_MINUEND_PLACES=589, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6425, PETRI_PLACES=601, PETRI_TRANSITIONS=552} [2024-06-21 20:46:19,763 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 570 predicate places. [2024-06-21 20:46:19,763 INFO L495 AbstractCegarLoop]: Abstraction has has 601 places, 552 transitions, 6425 flow [2024-06-21 20:46:19,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:19,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:19,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:19,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219 [2024-06-21 20:46:19,764 INFO L420 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:46:19,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:19,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1861692214, now seen corresponding path program 35 times [2024-06-21 20:46:19,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:19,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810249043] [2024-06-21 20:46:19,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:19,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:19,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:20,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:46:20,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:20,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810249043] [2024-06-21 20:46:20,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810249043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:20,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:20,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:46:20,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53563952] [2024-06-21 20:46:20,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:20,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:46:20,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:20,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:46:20,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:46:20,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:46:20,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 601 places, 552 transitions, 6425 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:20,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:20,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:46:20,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:21,730 INFO L124 PetriNetUnfolderBase]: 1351/2492 cut-off events. [2024-06-21 20:46:21,730 INFO L125 PetriNetUnfolderBase]: For 347794/347794 co-relation queries the response was YES. [2024-06-21 20:46:21,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16132 conditions, 2492 events. 1351/2492 cut-off events. For 347794/347794 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 16304 event pairs, 269 based on Foata normal form. 2/2493 useless extension candidates. Maximal degree in co-relation 15877. Up to 2355 conditions per place. [2024-06-21 20:46:21,773 INFO L140 encePairwiseOnDemand]: 21/32 looper letters, 537 selfloop transitions, 27 changer transitions 0/566 dead transitions. [2024-06-21 20:46:21,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 611 places, 566 transitions, 7585 flow [2024-06-21 20:46:21,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:46:21,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:46:21,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 121 transitions. [2024-06-21 20:46:21,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34375 [2024-06-21 20:46:21,774 INFO L175 Difference]: Start difference. First operand has 601 places, 552 transitions, 6425 flow. Second operand 11 states and 121 transitions. [2024-06-21 20:46:21,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 611 places, 566 transitions, 7585 flow [2024-06-21 20:46:24,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 598 places, 566 transitions, 7435 flow, removed 14 selfloop flow, removed 13 redundant places. [2024-06-21 20:46:24,020 INFO L231 Difference]: Finished difference. Result has 599 places, 552 transitions, 6333 flow [2024-06-21 20:46:24,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6275, PETRI_DIFFERENCE_MINUEND_PLACES=588, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6333, PETRI_PLACES=599, PETRI_TRANSITIONS=552} [2024-06-21 20:46:24,021 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 568 predicate places. [2024-06-21 20:46:24,021 INFO L495 AbstractCegarLoop]: Abstraction has has 599 places, 552 transitions, 6333 flow [2024-06-21 20:46:24,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:24,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:24,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:24,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220 [2024-06-21 20:46:24,021 INFO L420 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:46:24,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:24,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1900645514, now seen corresponding path program 40 times [2024-06-21 20:46:24,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:24,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499266200] [2024-06-21 20:46:24,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:24,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:24,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:24,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:46:24,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:24,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499266200] [2024-06-21 20:46:24,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499266200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:24,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:24,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:46:24,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229827184] [2024-06-21 20:46:24,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:24,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:46:24,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:24,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:46:24,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:46:25,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:46:25,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 599 places, 552 transitions, 6333 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:25,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:25,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:46:25,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:26,190 INFO L124 PetriNetUnfolderBase]: 1414/2600 cut-off events. [2024-06-21 20:46:26,191 INFO L125 PetriNetUnfolderBase]: For 356199/356199 co-relation queries the response was YES. [2024-06-21 20:46:26,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16780 conditions, 2600 events. 1414/2600 cut-off events. For 356199/356199 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 17094 event pairs, 101 based on Foata normal form. 2/2601 useless extension candidates. Maximal degree in co-relation 16526. Up to 1670 conditions per place. [2024-06-21 20:46:26,242 INFO L140 encePairwiseOnDemand]: 18/32 looper letters, 389 selfloop transitions, 218 changer transitions 0/609 dead transitions. [2024-06-21 20:46:26,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 611 places, 609 transitions, 8054 flow [2024-06-21 20:46:26,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:46:26,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:46:26,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 172 transitions. [2024-06-21 20:46:26,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41346153846153844 [2024-06-21 20:46:26,243 INFO L175 Difference]: Start difference. First operand has 599 places, 552 transitions, 6333 flow. Second operand 13 states and 172 transitions. [2024-06-21 20:46:26,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 611 places, 609 transitions, 8054 flow [2024-06-21 20:46:28,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 595 places, 609 transitions, 7565 flow, removed 31 selfloop flow, removed 16 redundant places. [2024-06-21 20:46:28,466 INFO L231 Difference]: Finished difference. Result has 600 places, 578 transitions, 6879 flow [2024-06-21 20:46:28,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=5844, PETRI_DIFFERENCE_MINUEND_PLACES=583, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6879, PETRI_PLACES=600, PETRI_TRANSITIONS=578} [2024-06-21 20:46:28,466 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 569 predicate places. [2024-06-21 20:46:28,466 INFO L495 AbstractCegarLoop]: Abstraction has has 600 places, 578 transitions, 6879 flow [2024-06-21 20:46:28,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:28,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:28,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:28,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221 [2024-06-21 20:46:28,466 INFO L420 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:46:28,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:28,467 INFO L85 PathProgramCache]: Analyzing trace with hash 544746308, now seen corresponding path program 41 times [2024-06-21 20:46:28,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:28,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297614926] [2024-06-21 20:46:28,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:28,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:28,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:29,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:46:29,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:29,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297614926] [2024-06-21 20:46:29,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297614926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:29,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:29,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:46:29,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531044354] [2024-06-21 20:46:29,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:29,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:46:29,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:29,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:46:29,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:46:29,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:46:29,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 600 places, 578 transitions, 6879 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:29,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:29,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:46:29,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:30,798 INFO L124 PetriNetUnfolderBase]: 1483/2722 cut-off events. [2024-06-21 20:46:30,799 INFO L125 PetriNetUnfolderBase]: For 362206/362206 co-relation queries the response was YES. [2024-06-21 20:46:30,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17702 conditions, 2722 events. 1483/2722 cut-off events. For 362206/362206 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 18066 event pairs, 142 based on Foata normal form. 2/2723 useless extension candidates. Maximal degree in co-relation 17449. Up to 1811 conditions per place. [2024-06-21 20:46:30,852 INFO L140 encePairwiseOnDemand]: 18/32 looper letters, 456 selfloop transitions, 187 changer transitions 0/645 dead transitions. [2024-06-21 20:46:30,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 612 places, 645 transitions, 8835 flow [2024-06-21 20:46:30,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:46:30,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:46:30,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 175 transitions. [2024-06-21 20:46:30,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4206730769230769 [2024-06-21 20:46:30,853 INFO L175 Difference]: Start difference. First operand has 600 places, 578 transitions, 6879 flow. Second operand 13 states and 175 transitions. [2024-06-21 20:46:30,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 612 places, 645 transitions, 8835 flow [2024-06-21 20:46:33,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 606 places, 645 transitions, 8271 flow, removed 100 selfloop flow, removed 6 redundant places. [2024-06-21 20:46:33,017 INFO L231 Difference]: Finished difference. Result has 610 places, 607 transitions, 7265 flow [2024-06-21 20:46:33,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6331, PETRI_DIFFERENCE_MINUEND_PLACES=594, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7265, PETRI_PLACES=610, PETRI_TRANSITIONS=607} [2024-06-21 20:46:33,017 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 579 predicate places. [2024-06-21 20:46:33,017 INFO L495 AbstractCegarLoop]: Abstraction has has 610 places, 607 transitions, 7265 flow [2024-06-21 20:46:33,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:33,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:33,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:33,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222 [2024-06-21 20:46:33,018 INFO L420 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:46:33,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:33,018 INFO L85 PathProgramCache]: Analyzing trace with hash -119656508, now seen corresponding path program 42 times [2024-06-21 20:46:33,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:33,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54132629] [2024-06-21 20:46:33,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:33,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:33,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:33,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:46:33,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:33,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54132629] [2024-06-21 20:46:33,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54132629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:33,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:33,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:46:33,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716333571] [2024-06-21 20:46:33,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:33,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:46:33,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:33,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:46:33,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:46:34,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:46:34,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 610 places, 607 transitions, 7265 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:34,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:34,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:46:34,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:35,326 INFO L124 PetriNetUnfolderBase]: 1522/2787 cut-off events. [2024-06-21 20:46:35,326 INFO L125 PetriNetUnfolderBase]: For 366944/366944 co-relation queries the response was YES. [2024-06-21 20:46:35,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17831 conditions, 2787 events. 1522/2787 cut-off events. For 366944/366944 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 18557 event pairs, 131 based on Foata normal form. 2/2788 useless extension candidates. Maximal degree in co-relation 17575. Up to 1879 conditions per place. [2024-06-21 20:46:35,373 INFO L140 encePairwiseOnDemand]: 18/32 looper letters, 463 selfloop transitions, 190 changer transitions 0/655 dead transitions. [2024-06-21 20:46:35,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 622 places, 655 transitions, 8973 flow [2024-06-21 20:46:35,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:46:35,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:46:35,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 166 transitions. [2024-06-21 20:46:35,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39903846153846156 [2024-06-21 20:46:35,374 INFO L175 Difference]: Start difference. First operand has 610 places, 607 transitions, 7265 flow. Second operand 13 states and 166 transitions. [2024-06-21 20:46:35,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 622 places, 655 transitions, 8973 flow [2024-06-21 20:46:37,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 617 places, 655 transitions, 8547 flow, removed 114 selfloop flow, removed 5 redundant places. [2024-06-21 20:46:37,753 INFO L231 Difference]: Finished difference. Result has 621 places, 623 transitions, 7559 flow [2024-06-21 20:46:37,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6839, PETRI_DIFFERENCE_MINUEND_PLACES=605, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7559, PETRI_PLACES=621, PETRI_TRANSITIONS=623} [2024-06-21 20:46:37,754 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 590 predicate places. [2024-06-21 20:46:37,754 INFO L495 AbstractCegarLoop]: Abstraction has has 621 places, 623 transitions, 7559 flow [2024-06-21 20:46:37,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:37,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:37,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:37,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable223 [2024-06-21 20:46:37,755 INFO L420 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:46:37,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:37,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1783631724, now seen corresponding path program 43 times [2024-06-21 20:46:37,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:37,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056866799] [2024-06-21 20:46:37,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:37,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:37,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:38,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:46:38,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:38,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056866799] [2024-06-21 20:46:38,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056866799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:38,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:38,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:46:38,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522126883] [2024-06-21 20:46:38,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:38,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:46:38,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:38,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:46:38,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:46:38,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:46:38,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 621 places, 623 transitions, 7559 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:38,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:38,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:46:38,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:40,052 INFO L124 PetriNetUnfolderBase]: 1528/2797 cut-off events. [2024-06-21 20:46:40,052 INFO L125 PetriNetUnfolderBase]: For 372495/372495 co-relation queries the response was YES. [2024-06-21 20:46:40,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17995 conditions, 2797 events. 1528/2797 cut-off events. For 372495/372495 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 18596 event pairs, 180 based on Foata normal form. 2/2798 useless extension candidates. Maximal degree in co-relation 17735. Up to 1838 conditions per place. [2024-06-21 20:46:40,101 INFO L140 encePairwiseOnDemand]: 18/32 looper letters, 467 selfloop transitions, 197 changer transitions 0/666 dead transitions. [2024-06-21 20:46:40,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 633 places, 666 transitions, 9256 flow [2024-06-21 20:46:40,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:46:40,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:46:40,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 177 transitions. [2024-06-21 20:46:40,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254807692307692 [2024-06-21 20:46:40,102 INFO L175 Difference]: Start difference. First operand has 621 places, 623 transitions, 7559 flow. Second operand 13 states and 177 transitions. [2024-06-21 20:46:40,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 633 places, 666 transitions, 9256 flow [2024-06-21 20:46:42,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 628 places, 666 transitions, 8760 flow, removed 95 selfloop flow, removed 5 redundant places. [2024-06-21 20:46:42,605 INFO L231 Difference]: Finished difference. Result has 629 places, 626 transitions, 7659 flow [2024-06-21 20:46:42,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=7065, PETRI_DIFFERENCE_MINUEND_PLACES=616, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7659, PETRI_PLACES=629, PETRI_TRANSITIONS=626} [2024-06-21 20:46:42,605 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 598 predicate places. [2024-06-21 20:46:42,605 INFO L495 AbstractCegarLoop]: Abstraction has has 629 places, 626 transitions, 7659 flow [2024-06-21 20:46:42,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:42,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:42,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:42,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224 [2024-06-21 20:46:42,605 INFO L420 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:46:42,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:42,606 INFO L85 PathProgramCache]: Analyzing trace with hash 314615828, now seen corresponding path program 44 times [2024-06-21 20:46:42,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:42,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691661149] [2024-06-21 20:46:42,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:42,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:42,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:43,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:46:43,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:43,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691661149] [2024-06-21 20:46:43,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691661149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:43,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:43,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:46:43,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144942880] [2024-06-21 20:46:43,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:43,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:46:43,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:43,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:46:43,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:46:43,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:46:43,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 629 places, 626 transitions, 7659 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:43,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:43,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:46:43,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:44,940 INFO L124 PetriNetUnfolderBase]: 1524/2791 cut-off events. [2024-06-21 20:46:44,940 INFO L125 PetriNetUnfolderBase]: For 326774/326774 co-relation queries the response was YES. [2024-06-21 20:46:44,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17235 conditions, 2791 events. 1524/2791 cut-off events. For 326774/326774 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 18562 event pairs, 187 based on Foata normal form. 2/2792 useless extension candidates. Maximal degree in co-relation 16974. Up to 1835 conditions per place. [2024-06-21 20:46:44,988 INFO L140 encePairwiseOnDemand]: 18/32 looper letters, 473 selfloop transitions, 192 changer transitions 0/667 dead transitions. [2024-06-21 20:46:44,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 641 places, 667 transitions, 9340 flow [2024-06-21 20:46:44,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:46:44,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:46:44,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 174 transitions. [2024-06-21 20:46:44,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4182692307692308 [2024-06-21 20:46:44,989 INFO L175 Difference]: Start difference. First operand has 629 places, 626 transitions, 7659 flow. Second operand 13 states and 174 transitions. [2024-06-21 20:46:44,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 641 places, 667 transitions, 9340 flow [2024-06-21 20:46:47,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 627 places, 667 transitions, 8745 flow, removed 146 selfloop flow, removed 14 redundant places. [2024-06-21 20:46:47,278 INFO L231 Difference]: Finished difference. Result has 628 places, 628 transitions, 7635 flow [2024-06-21 20:46:47,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=7064, PETRI_DIFFERENCE_MINUEND_PLACES=615, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7635, PETRI_PLACES=628, PETRI_TRANSITIONS=628} [2024-06-21 20:46:47,278 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 597 predicate places. [2024-06-21 20:46:47,278 INFO L495 AbstractCegarLoop]: Abstraction has has 628 places, 628 transitions, 7635 flow [2024-06-21 20:46:47,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:47,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:47,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:47,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225 [2024-06-21 20:46:47,279 INFO L420 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:46:47,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:47,279 INFO L85 PathProgramCache]: Analyzing trace with hash -603605690, now seen corresponding path program 1 times [2024-06-21 20:46:47,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:47,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390371600] [2024-06-21 20:46:47,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:47,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:47,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:48,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:46:48,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:48,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390371600] [2024-06-21 20:46:48,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390371600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:48,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:48,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:46:48,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329978685] [2024-06-21 20:46:48,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:48,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:46:48,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:48,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:46:48,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:46:48,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:46:48,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 628 places, 628 transitions, 7635 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:48,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:48,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:46:48,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:49,716 INFO L124 PetriNetUnfolderBase]: 1565/2878 cut-off events. [2024-06-21 20:46:49,716 INFO L125 PetriNetUnfolderBase]: For 668234/668234 co-relation queries the response was YES. [2024-06-21 20:46:49,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19761 conditions, 2878 events. 1565/2878 cut-off events. For 668234/668234 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 19121 event pairs, 238 based on Foata normal form. 8/2885 useless extension candidates. Maximal degree in co-relation 19508. Up to 2522 conditions per place. [2024-06-21 20:46:49,766 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 593 selfloop transitions, 54 changer transitions 16/665 dead transitions. [2024-06-21 20:46:49,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 641 places, 665 transitions, 9743 flow [2024-06-21 20:46:49,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 20:46:49,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 20:46:49,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 169 transitions. [2024-06-21 20:46:49,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37723214285714285 [2024-06-21 20:46:49,767 INFO L175 Difference]: Start difference. First operand has 628 places, 628 transitions, 7635 flow. Second operand 14 states and 169 transitions. [2024-06-21 20:46:49,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 641 places, 665 transitions, 9743 flow [2024-06-21 20:46:52,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 632 places, 665 transitions, 9180 flow, removed 113 selfloop flow, removed 9 redundant places. [2024-06-21 20:46:52,896 INFO L231 Difference]: Finished difference. Result has 633 places, 624 transitions, 7163 flow [2024-06-21 20:46:52,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=7072, PETRI_DIFFERENCE_MINUEND_PLACES=619, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7163, PETRI_PLACES=633, PETRI_TRANSITIONS=624} [2024-06-21 20:46:52,897 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 602 predicate places. [2024-06-21 20:46:52,897 INFO L495 AbstractCegarLoop]: Abstraction has has 633 places, 624 transitions, 7163 flow [2024-06-21 20:46:52,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:52,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:52,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:52,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226 [2024-06-21 20:46:52,898 INFO L420 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:46:52,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:52,898 INFO L85 PathProgramCache]: Analyzing trace with hash -545393270, now seen corresponding path program 2 times [2024-06-21 20:46:52,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:52,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225686562] [2024-06-21 20:46:52,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:52,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:52,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:54,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:46:54,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:54,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225686562] [2024-06-21 20:46:54,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225686562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:54,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:54,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:46:54,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929483927] [2024-06-21 20:46:54,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:54,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:46:54,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:54,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:46:54,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:46:54,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:46:54,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 633 places, 624 transitions, 7163 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:54,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:54,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:46:54,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:46:55,187 INFO L124 PetriNetUnfolderBase]: 1549/2848 cut-off events. [2024-06-21 20:46:55,187 INFO L125 PetriNetUnfolderBase]: For 715048/715048 co-relation queries the response was YES. [2024-06-21 20:46:55,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19208 conditions, 2848 events. 1549/2848 cut-off events. For 715048/715048 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 18872 event pairs, 248 based on Foata normal form. 10/2857 useless extension candidates. Maximal degree in co-relation 18958. Up to 2635 conditions per place. [2024-06-21 20:46:55,236 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 585 selfloop transitions, 54 changer transitions 11/652 dead transitions. [2024-06-21 20:46:55,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 640 places, 652 transitions, 8713 flow [2024-06-21 20:46:55,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 20:46:55,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 20:46:55,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 161 transitions. [2024-06-21 20:46:55,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.359375 [2024-06-21 20:46:55,238 INFO L175 Difference]: Start difference. First operand has 633 places, 624 transitions, 7163 flow. Second operand 14 states and 161 transitions. [2024-06-21 20:46:55,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 640 places, 652 transitions, 8713 flow [2024-06-21 20:46:58,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 627 places, 652 transitions, 8608 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-21 20:46:58,530 INFO L231 Difference]: Finished difference. Result has 628 places, 621 transitions, 7151 flow [2024-06-21 20:46:58,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=7058, PETRI_DIFFERENCE_MINUEND_PLACES=614, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7151, PETRI_PLACES=628, PETRI_TRANSITIONS=621} [2024-06-21 20:46:58,531 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 597 predicate places. [2024-06-21 20:46:58,531 INFO L495 AbstractCegarLoop]: Abstraction has has 628 places, 621 transitions, 7151 flow [2024-06-21 20:46:58,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:58,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:46:58,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:46:58,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227 [2024-06-21 20:46:58,531 INFO L420 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:46:58,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:46:58,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1329904060, now seen corresponding path program 3 times [2024-06-21 20:46:58,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:46:58,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766267083] [2024-06-21 20:46:58,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:46:58,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:46:58,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:46:59,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:46:59,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:46:59,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766267083] [2024-06-21 20:46:59,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766267083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:46:59,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:46:59,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:46:59,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049021090] [2024-06-21 20:46:59,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:46:59,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:46:59,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:46:59,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:46:59,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:46:59,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:46:59,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 628 places, 621 transitions, 7151 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:46:59,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:46:59,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:46:59,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:47:01,081 INFO L124 PetriNetUnfolderBase]: 1559/2874 cut-off events. [2024-06-21 20:47:01,081 INFO L125 PetriNetUnfolderBase]: For 813686/813686 co-relation queries the response was YES. [2024-06-21 20:47:01,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20915 conditions, 2874 events. 1559/2874 cut-off events. For 813686/813686 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 19051 event pairs, 256 based on Foata normal form. 8/2881 useless extension candidates. Maximal degree in co-relation 20668. Up to 2596 conditions per place. [2024-06-21 20:47:01,132 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 590 selfloop transitions, 52 changer transitions 10/654 dead transitions. [2024-06-21 20:47:01,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 639 places, 654 transitions, 9213 flow [2024-06-21 20:47:01,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-21 20:47:01,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-21 20:47:01,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 169 transitions. [2024-06-21 20:47:01,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35208333333333336 [2024-06-21 20:47:01,133 INFO L175 Difference]: Start difference. First operand has 628 places, 621 transitions, 7151 flow. Second operand 15 states and 169 transitions. [2024-06-21 20:47:01,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 639 places, 654 transitions, 9213 flow [2024-06-21 20:47:05,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 626 places, 654 transitions, 9097 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-21 20:47:05,506 INFO L231 Difference]: Finished difference. Result has 627 places, 616 transitions, 7114 flow [2024-06-21 20:47:05,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=7039, PETRI_DIFFERENCE_MINUEND_PLACES=612, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=7114, PETRI_PLACES=627, PETRI_TRANSITIONS=616} [2024-06-21 20:47:05,506 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 596 predicate places. [2024-06-21 20:47:05,507 INFO L495 AbstractCegarLoop]: Abstraction has has 627 places, 616 transitions, 7114 flow [2024-06-21 20:47:05,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:05,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:47:05,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:47:05,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228 [2024-06-21 20:47:05,507 INFO L420 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:47:05,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:47:05,507 INFO L85 PathProgramCache]: Analyzing trace with hash -545513240, now seen corresponding path program 4 times [2024-06-21 20:47:05,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:47:05,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807096636] [2024-06-21 20:47:05,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:47:05,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:47:05,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:47:06,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:47:06,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:47:06,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807096636] [2024-06-21 20:47:06,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807096636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:47:06,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:47:06,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:47:06,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242826931] [2024-06-21 20:47:06,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:47:06,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:47:06,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:47:06,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:47:06,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:47:06,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:47:06,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 627 places, 616 transitions, 7114 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:06,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:47:06,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:47:06,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:47:07,740 INFO L124 PetriNetUnfolderBase]: 1552/2865 cut-off events. [2024-06-21 20:47:07,740 INFO L125 PetriNetUnfolderBase]: For 804986/804986 co-relation queries the response was YES. [2024-06-21 20:47:07,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20842 conditions, 2865 events. 1552/2865 cut-off events. For 804986/804986 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 19005 event pairs, 260 based on Foata normal form. 8/2872 useless extension candidates. Maximal degree in co-relation 20596. Up to 2657 conditions per place. [2024-06-21 20:47:07,789 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 578 selfloop transitions, 43 changer transitions 22/645 dead transitions. [2024-06-21 20:47:07,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 637 places, 645 transitions, 8553 flow [2024-06-21 20:47:07,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 20:47:07,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 20:47:07,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 158 transitions. [2024-06-21 20:47:07,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35267857142857145 [2024-06-21 20:47:07,790 INFO L175 Difference]: Start difference. First operand has 627 places, 616 transitions, 7114 flow. Second operand 14 states and 158 transitions. [2024-06-21 20:47:07,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 637 places, 645 transitions, 8553 flow [2024-06-21 20:47:12,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 623 places, 645 transitions, 8449 flow, removed 2 selfloop flow, removed 14 redundant places. [2024-06-21 20:47:12,453 INFO L231 Difference]: Finished difference. Result has 625 places, 607 transitions, 6986 flow [2024-06-21 20:47:12,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=7010, PETRI_DIFFERENCE_MINUEND_PLACES=610, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6986, PETRI_PLACES=625, PETRI_TRANSITIONS=607} [2024-06-21 20:47:12,453 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 594 predicate places. [2024-06-21 20:47:12,453 INFO L495 AbstractCegarLoop]: Abstraction has has 625 places, 607 transitions, 6986 flow [2024-06-21 20:47:12,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:12,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:47:12,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:47:12,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229 [2024-06-21 20:47:12,454 INFO L420 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:47:12,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:47:12,454 INFO L85 PathProgramCache]: Analyzing trace with hash 2146521490, now seen corresponding path program 5 times [2024-06-21 20:47:12,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:47:12,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670602571] [2024-06-21 20:47:12,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:47:12,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:47:12,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:47:13,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:47:13,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:47:13,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670602571] [2024-06-21 20:47:13,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670602571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:47:13,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:47:13,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:47:13,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308452231] [2024-06-21 20:47:13,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:47:13,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:47:13,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:47:13,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:47:13,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:47:13,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:47:13,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 625 places, 607 transitions, 6986 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:13,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:47:13,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:47:13,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:47:14,996 INFO L124 PetriNetUnfolderBase]: 1532/2834 cut-off events. [2024-06-21 20:47:14,997 INFO L125 PetriNetUnfolderBase]: For 844765/844765 co-relation queries the response was YES. [2024-06-21 20:47:15,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20778 conditions, 2834 events. 1532/2834 cut-off events. For 844765/844765 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 18850 event pairs, 266 based on Foata normal form. 10/2843 useless extension candidates. Maximal degree in co-relation 20532. Up to 2669 conditions per place. [2024-06-21 20:47:15,037 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 577 selfloop transitions, 34 changer transitions 18/631 dead transitions. [2024-06-21 20:47:15,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 630 places, 631 transitions, 8482 flow [2024-06-21 20:47:15,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:47:15,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:47:15,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 142 transitions. [2024-06-21 20:47:15,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34134615384615385 [2024-06-21 20:47:15,038 INFO L175 Difference]: Start difference. First operand has 625 places, 607 transitions, 6986 flow. Second operand 13 states and 142 transitions. [2024-06-21 20:47:15,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 630 places, 631 transitions, 8482 flow [2024-06-21 20:47:19,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 612 places, 631 transitions, 8153 flow, removed 7 selfloop flow, removed 18 redundant places. [2024-06-21 20:47:19,500 INFO L231 Difference]: Finished difference. Result has 613 places, 599 transitions, 6647 flow [2024-06-21 20:47:19,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6659, PETRI_DIFFERENCE_MINUEND_PLACES=600, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6647, PETRI_PLACES=613, PETRI_TRANSITIONS=599} [2024-06-21 20:47:19,501 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 582 predicate places. [2024-06-21 20:47:19,501 INFO L495 AbstractCegarLoop]: Abstraction has has 613 places, 599 transitions, 6647 flow [2024-06-21 20:47:19,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:19,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:47:19,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:47:19,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230 [2024-06-21 20:47:19,501 INFO L420 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:47:19,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:47:19,502 INFO L85 PathProgramCache]: Analyzing trace with hash 2142052840, now seen corresponding path program 6 times [2024-06-21 20:47:19,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:47:19,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845089048] [2024-06-21 20:47:19,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:47:19,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:47:19,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:47:20,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:47:20,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:47:20,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845089048] [2024-06-21 20:47:20,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845089048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:47:20,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:47:20,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:47:20,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565315206] [2024-06-21 20:47:20,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:47:20,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:47:20,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:47:20,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:47:20,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:47:20,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:47:20,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 613 places, 599 transitions, 6647 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:20,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:47:20,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:47:20,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:47:21,751 INFO L124 PetriNetUnfolderBase]: 1484/2742 cut-off events. [2024-06-21 20:47:21,751 INFO L125 PetriNetUnfolderBase]: For 615416/615416 co-relation queries the response was YES. [2024-06-21 20:47:21,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17403 conditions, 2742 events. 1484/2742 cut-off events. For 615416/615416 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 18186 event pairs, 247 based on Foata normal form. 10/2751 useless extension candidates. Maximal degree in co-relation 17165. Up to 2586 conditions per place. [2024-06-21 20:47:21,795 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 573 selfloop transitions, 35 changer transitions 13/623 dead transitions. [2024-06-21 20:47:21,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 618 places, 623 transitions, 8125 flow [2024-06-21 20:47:21,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:47:21,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:47:21,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 142 transitions. [2024-06-21 20:47:21,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34134615384615385 [2024-06-21 20:47:21,796 INFO L175 Difference]: Start difference. First operand has 613 places, 599 transitions, 6647 flow. Second operand 13 states and 142 transitions. [2024-06-21 20:47:21,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 618 places, 623 transitions, 8125 flow [2024-06-21 20:47:24,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 608 places, 623 transitions, 8053 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 20:47:24,103 INFO L231 Difference]: Finished difference. Result has 609 places, 595 transitions, 6624 flow [2024-06-21 20:47:24,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6575, PETRI_DIFFERENCE_MINUEND_PLACES=596, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6624, PETRI_PLACES=609, PETRI_TRANSITIONS=595} [2024-06-21 20:47:24,104 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 578 predicate places. [2024-06-21 20:47:24,104 INFO L495 AbstractCegarLoop]: Abstraction has has 609 places, 595 transitions, 6624 flow [2024-06-21 20:47:24,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:24,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:47:24,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:47:24,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231 [2024-06-21 20:47:24,105 INFO L420 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:47:24,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:47:24,105 INFO L85 PathProgramCache]: Analyzing trace with hash 2141932870, now seen corresponding path program 7 times [2024-06-21 20:47:24,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:47:24,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687639668] [2024-06-21 20:47:24,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:47:24,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:47:24,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:47:25,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:47:25,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:47:25,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687639668] [2024-06-21 20:47:25,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687639668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:47:25,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:47:25,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:47:25,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037319910] [2024-06-21 20:47:25,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:47:25,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:47:25,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:47:25,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:47:25,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:47:25,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:47:25,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 609 places, 595 transitions, 6624 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:25,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:47:25,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:47:25,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:47:26,479 INFO L124 PetriNetUnfolderBase]: 1449/2673 cut-off events. [2024-06-21 20:47:26,479 INFO L125 PetriNetUnfolderBase]: For 407522/407522 co-relation queries the response was YES. [2024-06-21 20:47:26,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15152 conditions, 2673 events. 1449/2673 cut-off events. For 407522/407522 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 17695 event pairs, 223 based on Foata normal form. 8/2680 useless extension candidates. Maximal degree in co-relation 14915. Up to 2522 conditions per place. [2024-06-21 20:47:26,523 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 565 selfloop transitions, 21 changer transitions 31/619 dead transitions. [2024-06-21 20:47:26,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 615 places, 619 transitions, 7996 flow [2024-06-21 20:47:26,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:47:26,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:47:26,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 140 transitions. [2024-06-21 20:47:26,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33653846153846156 [2024-06-21 20:47:26,524 INFO L175 Difference]: Start difference. First operand has 609 places, 595 transitions, 6624 flow. Second operand 13 states and 140 transitions. [2024-06-21 20:47:26,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 615 places, 619 transitions, 7996 flow [2024-06-21 20:47:28,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 603 places, 619 transitions, 7910 flow, removed 8 selfloop flow, removed 12 redundant places. [2024-06-21 20:47:28,208 INFO L231 Difference]: Finished difference. Result has 604 places, 578 transitions, 6410 flow [2024-06-21 20:47:28,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=6542, PETRI_DIFFERENCE_MINUEND_PLACES=591, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6410, PETRI_PLACES=604, PETRI_TRANSITIONS=578} [2024-06-21 20:47:28,208 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 573 predicate places. [2024-06-21 20:47:28,209 INFO L495 AbstractCegarLoop]: Abstraction has has 604 places, 578 transitions, 6410 flow [2024-06-21 20:47:28,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:28,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:47:28,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:47:28,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232 [2024-06-21 20:47:28,209 INFO L420 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:47:28,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:47:28,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1438599868, now seen corresponding path program 1 times [2024-06-21 20:47:28,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:47:28,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164600402] [2024-06-21 20:47:28,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:47:28,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:47:28,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:47:29,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:47:29,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:47:29,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164600402] [2024-06-21 20:47:29,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164600402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:47:29,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:47:29,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 20:47:29,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184621954] [2024-06-21 20:47:29,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:47:29,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 20:47:29,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:47:29,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 20:47:29,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-06-21 20:47:29,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:47:29,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 604 places, 578 transitions, 6410 flow. Second operand has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:29,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:47:29,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:47:29,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:47:30,452 INFO L124 PetriNetUnfolderBase]: 1410/2589 cut-off events. [2024-06-21 20:47:30,452 INFO L125 PetriNetUnfolderBase]: For 286870/286870 co-relation queries the response was YES. [2024-06-21 20:47:30,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14587 conditions, 2589 events. 1410/2589 cut-off events. For 286870/286870 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 17079 event pairs, 94 based on Foata normal form. 2/2590 useless extension candidates. Maximal degree in co-relation 14352. Up to 1757 conditions per place. [2024-06-21 20:47:30,494 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 396 selfloop transitions, 203 changer transitions 0/601 dead transitions. [2024-06-21 20:47:30,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 603 places, 601 transitions, 7682 flow [2024-06-21 20:47:30,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:47:30,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:47:30,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 151 transitions. [2024-06-21 20:47:30,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932291666666667 [2024-06-21 20:47:30,495 INFO L175 Difference]: Start difference. First operand has 604 places, 578 transitions, 6410 flow. Second operand 12 states and 151 transitions. [2024-06-21 20:47:30,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 603 places, 601 transitions, 7682 flow [2024-06-21 20:47:32,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 581 places, 601 transitions, 7183 flow, removed 8 selfloop flow, removed 22 redundant places. [2024-06-21 20:47:32,623 INFO L231 Difference]: Finished difference. Result has 582 places, 579 transitions, 6338 flow [2024-06-21 20:47:32,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=5913, PETRI_DIFFERENCE_MINUEND_PLACES=570, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6338, PETRI_PLACES=582, PETRI_TRANSITIONS=579} [2024-06-21 20:47:32,624 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 551 predicate places. [2024-06-21 20:47:32,624 INFO L495 AbstractCegarLoop]: Abstraction has has 582 places, 579 transitions, 6338 flow [2024-06-21 20:47:32,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:32,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:47:32,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:47:32,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable233 [2024-06-21 20:47:32,624 INFO L420 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:47:32,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:47:32,625 INFO L85 PathProgramCache]: Analyzing trace with hash 653913804, now seen corresponding path program 8 times [2024-06-21 20:47:32,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:47:32,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828458043] [2024-06-21 20:47:32,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:47:32,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:47:32,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:47:33,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:47:33,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:47:33,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828458043] [2024-06-21 20:47:33,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828458043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:47:33,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:47:33,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:47:33,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831161316] [2024-06-21 20:47:33,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:47:33,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:47:33,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:47:33,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:47:33,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:47:33,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:47:33,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 582 places, 579 transitions, 6338 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:33,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:47:33,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:47:33,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:47:34,825 INFO L124 PetriNetUnfolderBase]: 1426/2625 cut-off events. [2024-06-21 20:47:34,826 INFO L125 PetriNetUnfolderBase]: For 424555/424555 co-relation queries the response was YES. [2024-06-21 20:47:34,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15125 conditions, 2625 events. 1426/2625 cut-off events. For 424555/424555 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 17322 event pairs, 94 based on Foata normal form. 10/2634 useless extension candidates. Maximal degree in co-relation 14896. Up to 1613 conditions per place. [2024-06-21 20:47:34,868 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 359 selfloop transitions, 229 changer transitions 17/607 dead transitions. [2024-06-21 20:47:34,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 594 places, 607 transitions, 7794 flow [2024-06-21 20:47:34,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:47:34,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:47:34,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 167 transitions. [2024-06-21 20:47:34,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4014423076923077 [2024-06-21 20:47:34,869 INFO L175 Difference]: Start difference. First operand has 582 places, 579 transitions, 6338 flow. Second operand 13 states and 167 transitions. [2024-06-21 20:47:34,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 594 places, 607 transitions, 7794 flow [2024-06-21 20:47:37,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 584 places, 607 transitions, 7385 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 20:47:37,262 INFO L231 Difference]: Finished difference. Result has 585 places, 570 transitions, 6342 flow [2024-06-21 20:47:37,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=5929, PETRI_DIFFERENCE_MINUEND_PLACES=572, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6342, PETRI_PLACES=585, PETRI_TRANSITIONS=570} [2024-06-21 20:47:37,262 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 554 predicate places. [2024-06-21 20:47:37,262 INFO L495 AbstractCegarLoop]: Abstraction has has 585 places, 570 transitions, 6342 flow [2024-06-21 20:47:37,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:37,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:47:37,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:47:37,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234 [2024-06-21 20:47:37,263 INFO L420 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:47:37,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:47:37,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1272186164, now seen corresponding path program 9 times [2024-06-21 20:47:37,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:47:37,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485865763] [2024-06-21 20:47:37,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:47:37,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:47:37,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:47:38,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:47:38,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:47:38,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485865763] [2024-06-21 20:47:38,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485865763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:47:38,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:47:38,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:47:38,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476504707] [2024-06-21 20:47:38,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:47:38,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:47:38,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:47:38,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:47:38,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:47:38,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:47:38,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 585 places, 570 transitions, 6342 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:38,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:47:38,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:47:38,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:47:39,605 INFO L124 PetriNetUnfolderBase]: 1394/2577 cut-off events. [2024-06-21 20:47:39,605 INFO L125 PetriNetUnfolderBase]: For 428380/428380 co-relation queries the response was YES. [2024-06-21 20:47:39,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15036 conditions, 2577 events. 1394/2577 cut-off events. For 428380/428380 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 17011 event pairs, 98 based on Foata normal form. 10/2586 useless extension candidates. Maximal degree in co-relation 14806. Up to 1661 conditions per place. [2024-06-21 20:47:39,646 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 372 selfloop transitions, 205 changer transitions 18/597 dead transitions. [2024-06-21 20:47:39,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 594 places, 597 transitions, 7774 flow [2024-06-21 20:47:39,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:47:39,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:47:39,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 162 transitions. [2024-06-21 20:47:39,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3894230769230769 [2024-06-21 20:47:39,647 INFO L175 Difference]: Start difference. First operand has 585 places, 570 transitions, 6342 flow. Second operand 13 states and 162 transitions. [2024-06-21 20:47:39,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 594 places, 597 transitions, 7774 flow [2024-06-21 20:47:41,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 582 places, 597 transitions, 7304 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-21 20:47:41,645 INFO L231 Difference]: Finished difference. Result has 583 places, 560 transitions, 6220 flow [2024-06-21 20:47:41,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=5876, PETRI_DIFFERENCE_MINUEND_PLACES=570, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6220, PETRI_PLACES=583, PETRI_TRANSITIONS=560} [2024-06-21 20:47:41,646 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 552 predicate places. [2024-06-21 20:47:41,646 INFO L495 AbstractCegarLoop]: Abstraction has has 583 places, 560 transitions, 6220 flow [2024-06-21 20:47:41,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:41,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:47:41,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:47:41,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable235 [2024-06-21 20:47:41,646 INFO L420 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:47:41,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:47:41,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1272181514, now seen corresponding path program 10 times [2024-06-21 20:47:41,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:47:41,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781443312] [2024-06-21 20:47:41,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:47:41,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:47:41,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:47:42,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:47:42,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:47:42,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781443312] [2024-06-21 20:47:42,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781443312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:47:42,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:47:42,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:47:42,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964964072] [2024-06-21 20:47:42,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:47:42,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:47:42,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:47:42,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:47:42,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:47:43,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:47:43,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 583 places, 560 transitions, 6220 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:43,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:47:43,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:47:43,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:47:43,908 INFO L124 PetriNetUnfolderBase]: 1358/2521 cut-off events. [2024-06-21 20:47:43,908 INFO L125 PetriNetUnfolderBase]: For 381895/381895 co-relation queries the response was YES. [2024-06-21 20:47:43,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14553 conditions, 2521 events. 1358/2521 cut-off events. For 381895/381895 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 16720 event pairs, 94 based on Foata normal form. 8/2528 useless extension candidates. Maximal degree in co-relation 14324. Up to 1645 conditions per place. [2024-06-21 20:47:43,948 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 369 selfloop transitions, 195 changer transitions 20/586 dead transitions. [2024-06-21 20:47:43,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 592 places, 586 transitions, 7532 flow [2024-06-21 20:47:43,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:47:43,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:47:43,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 159 transitions. [2024-06-21 20:47:43,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38221153846153844 [2024-06-21 20:47:43,949 INFO L175 Difference]: Start difference. First operand has 583 places, 560 transitions, 6220 flow. Second operand 13 states and 159 transitions. [2024-06-21 20:47:43,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 592 places, 586 transitions, 7532 flow [2024-06-21 20:47:45,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 579 places, 586 transitions, 7103 flow, removed 7 selfloop flow, removed 13 redundant places. [2024-06-21 20:47:45,853 INFO L231 Difference]: Finished difference. Result has 580 places, 549 transitions, 6072 flow [2024-06-21 20:47:45,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=5791, PETRI_DIFFERENCE_MINUEND_PLACES=567, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6072, PETRI_PLACES=580, PETRI_TRANSITIONS=549} [2024-06-21 20:47:45,854 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 549 predicate places. [2024-06-21 20:47:45,854 INFO L495 AbstractCegarLoop]: Abstraction has has 580 places, 549 transitions, 6072 flow [2024-06-21 20:47:45,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:45,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:47:45,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:47:45,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236 [2024-06-21 20:47:45,854 INFO L420 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:47:45,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:47:45,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1438415294, now seen corresponding path program 11 times [2024-06-21 20:47:45,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:47:45,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594708543] [2024-06-21 20:47:45,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:47:45,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:47:45,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:47:46,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:47:46,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:47:46,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594708543] [2024-06-21 20:47:46,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594708543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:47:46,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:47:46,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:47:46,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224666355] [2024-06-21 20:47:46,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:47:46,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:47:46,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:47:46,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:47:46,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:47:47,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:47:47,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 580 places, 549 transitions, 6072 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:47,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:47:47,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:47:47,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:47:47,938 INFO L124 PetriNetUnfolderBase]: 1367/2540 cut-off events. [2024-06-21 20:47:47,938 INFO L125 PetriNetUnfolderBase]: For 564492/564492 co-relation queries the response was YES. [2024-06-21 20:47:47,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16873 conditions, 2540 events. 1367/2540 cut-off events. For 564492/564492 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 16635 event pairs, 105 based on Foata normal form. 8/2547 useless extension candidates. Maximal degree in co-relation 16646. Up to 1497 conditions per place. [2024-06-21 20:47:47,978 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 350 selfloop transitions, 215 changer transitions 14/581 dead transitions. [2024-06-21 20:47:47,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 584 places, 581 transitions, 7946 flow [2024-06-21 20:47:47,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:47:47,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:47:47,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 168 transitions. [2024-06-21 20:47:47,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40384615384615385 [2024-06-21 20:47:47,980 INFO L175 Difference]: Start difference. First operand has 580 places, 549 transitions, 6072 flow. Second operand 13 states and 168 transitions. [2024-06-21 20:47:47,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 584 places, 581 transitions, 7946 flow [2024-06-21 20:47:51,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 569 places, 581 transitions, 7343 flow, removed 33 selfloop flow, removed 15 redundant places. [2024-06-21 20:47:51,061 INFO L231 Difference]: Finished difference. Result has 570 places, 540 transitions, 5809 flow [2024-06-21 20:47:51,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=5485, PETRI_DIFFERENCE_MINUEND_PLACES=557, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5809, PETRI_PLACES=570, PETRI_TRANSITIONS=540} [2024-06-21 20:47:51,061 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 539 predicate places. [2024-06-21 20:47:51,061 INFO L495 AbstractCegarLoop]: Abstraction has has 570 places, 540 transitions, 5809 flow [2024-06-21 20:47:51,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:51,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:47:51,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:47:51,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237 [2024-06-21 20:47:51,062 INFO L420 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:47:51,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:47:51,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1438592924, now seen corresponding path program 12 times [2024-06-21 20:47:51,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:47:51,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187806784] [2024-06-21 20:47:51,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:47:51,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:47:51,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:47:52,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:47:52,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:47:52,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187806784] [2024-06-21 20:47:52,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187806784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:47:52,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:47:52,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:47:52,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542909381] [2024-06-21 20:47:52,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:47:52,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:47:52,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:47:52,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:47:52,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:47:52,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:47:52,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 570 places, 540 transitions, 5809 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:52,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:47:52,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:47:52,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:47:53,297 INFO L124 PetriNetUnfolderBase]: 1387/2580 cut-off events. [2024-06-21 20:47:53,297 INFO L125 PetriNetUnfolderBase]: For 691596/691596 co-relation queries the response was YES. [2024-06-21 20:47:53,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16852 conditions, 2580 events. 1387/2580 cut-off events. For 691596/691596 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 16963 event pairs, 112 based on Foata normal form. 16/2595 useless extension candidates. Maximal degree in co-relation 16630. Up to 1611 conditions per place. [2024-06-21 20:47:53,336 INFO L140 encePairwiseOnDemand]: 18/32 looper letters, 355 selfloop transitions, 187 changer transitions 32/576 dead transitions. [2024-06-21 20:47:53,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 579 places, 576 transitions, 7257 flow [2024-06-21 20:47:53,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:47:53,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:47:53,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 165 transitions. [2024-06-21 20:47:53,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39663461538461536 [2024-06-21 20:47:53,337 INFO L175 Difference]: Start difference. First operand has 570 places, 540 transitions, 5809 flow. Second operand 13 states and 165 transitions. [2024-06-21 20:47:53,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 579 places, 576 transitions, 7257 flow [2024-06-21 20:47:56,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 566 places, 576 transitions, 6795 flow, removed 10 selfloop flow, removed 13 redundant places. [2024-06-21 20:47:56,238 INFO L231 Difference]: Finished difference. Result has 568 places, 526 transitions, 5588 flow [2024-06-21 20:47:56,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=5363, PETRI_DIFFERENCE_MINUEND_PLACES=554, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5588, PETRI_PLACES=568, PETRI_TRANSITIONS=526} [2024-06-21 20:47:56,239 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 537 predicate places. [2024-06-21 20:47:56,239 INFO L495 AbstractCegarLoop]: Abstraction has has 568 places, 526 transitions, 5588 flow [2024-06-21 20:47:56,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:56,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:47:56,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:47:56,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238 [2024-06-21 20:47:56,239 INFO L420 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:47:56,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:47:56,239 INFO L85 PathProgramCache]: Analyzing trace with hash 483206724, now seen corresponding path program 13 times [2024-06-21 20:47:56,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:47:56,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851855769] [2024-06-21 20:47:56,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:47:56,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:47:56,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:47:57,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:47:57,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:47:57,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851855769] [2024-06-21 20:47:57,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851855769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:47:57,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:47:57,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:47:57,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134921952] [2024-06-21 20:47:57,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:47:57,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:47:57,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:47:57,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:47:57,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:47:57,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:47:57,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 568 places, 526 transitions, 5588 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:47:57,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:47:57,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:47:57,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:47:58,546 INFO L124 PetriNetUnfolderBase]: 1340/2503 cut-off events. [2024-06-21 20:47:58,546 INFO L125 PetriNetUnfolderBase]: For 721542/721542 co-relation queries the response was YES. [2024-06-21 20:47:58,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18387 conditions, 2503 events. 1340/2503 cut-off events. For 721542/721542 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 16401 event pairs, 130 based on Foata normal form. 8/2510 useless extension candidates. Maximal degree in co-relation 18166. Up to 1524 conditions per place. [2024-06-21 20:47:58,586 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 344 selfloop transitions, 203 changer transitions 10/559 dead transitions. [2024-06-21 20:47:58,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 574 places, 559 transitions, 7406 flow [2024-06-21 20:47:58,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:47:58,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:47:58,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 168 transitions. [2024-06-21 20:47:58,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40384615384615385 [2024-06-21 20:47:58,587 INFO L175 Difference]: Start difference. First operand has 568 places, 526 transitions, 5588 flow. Second operand 13 states and 168 transitions. [2024-06-21 20:47:58,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 574 places, 559 transitions, 7406 flow [2024-06-21 20:48:03,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 561 places, 559 transitions, 6990 flow, removed 17 selfloop flow, removed 13 redundant places. [2024-06-21 20:48:03,081 INFO L231 Difference]: Finished difference. Result has 562 places, 521 transitions, 5557 flow [2024-06-21 20:48:03,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=5176, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5557, PETRI_PLACES=562, PETRI_TRANSITIONS=521} [2024-06-21 20:48:03,082 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 531 predicate places. [2024-06-21 20:48:03,082 INFO L495 AbstractCegarLoop]: Abstraction has has 562 places, 521 transitions, 5557 flow [2024-06-21 20:48:03,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:03,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:03,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:03,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239 [2024-06-21 20:48:03,082 INFO L420 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:48:03,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:03,083 INFO L85 PathProgramCache]: Analyzing trace with hash 483211374, now seen corresponding path program 14 times [2024-06-21 20:48:03,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:03,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214360899] [2024-06-21 20:48:03,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:03,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:03,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:04,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:04,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:04,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214360899] [2024-06-21 20:48:04,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214360899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:04,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:04,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:48:04,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911964366] [2024-06-21 20:48:04,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:04,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:48:04,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:04,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:48:04,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:48:04,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:48:04,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 562 places, 521 transitions, 5557 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:04,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:04,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:48:04,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:05,183 INFO L124 PetriNetUnfolderBase]: 1303/2436 cut-off events. [2024-06-21 20:48:05,183 INFO L125 PetriNetUnfolderBase]: For 573350/573350 co-relation queries the response was YES. [2024-06-21 20:48:05,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15968 conditions, 2436 events. 1303/2436 cut-off events. For 573350/573350 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 15945 event pairs, 109 based on Foata normal form. 10/2445 useless extension candidates. Maximal degree in co-relation 15750. Up to 1476 conditions per place. [2024-06-21 20:48:05,223 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 315 selfloop transitions, 208 changer transitions 25/550 dead transitions. [2024-06-21 20:48:05,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 573 places, 550 transitions, 6891 flow [2024-06-21 20:48:05,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 20:48:05,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 20:48:05,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 172 transitions. [2024-06-21 20:48:05,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-21 20:48:05,224 INFO L175 Difference]: Start difference. First operand has 562 places, 521 transitions, 5557 flow. Second operand 14 states and 172 transitions. [2024-06-21 20:48:05,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 573 places, 550 transitions, 6891 flow [2024-06-21 20:48:07,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 561 places, 550 transitions, 6489 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-21 20:48:07,728 INFO L231 Difference]: Finished difference. Result has 562 places, 505 transitions, 5493 flow [2024-06-21 20:48:07,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=5155, PETRI_DIFFERENCE_MINUEND_PLACES=548, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5493, PETRI_PLACES=562, PETRI_TRANSITIONS=505} [2024-06-21 20:48:07,729 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 531 predicate places. [2024-06-21 20:48:07,729 INFO L495 AbstractCegarLoop]: Abstraction has has 562 places, 505 transitions, 5493 flow [2024-06-21 20:48:07,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:07,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:07,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:07,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240 [2024-06-21 20:48:07,730 INFO L420 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:48:07,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:07,730 INFO L85 PathProgramCache]: Analyzing trace with hash 660580478, now seen corresponding path program 2 times [2024-06-21 20:48:07,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:07,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039742888] [2024-06-21 20:48:07,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:07,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:07,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:08,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:08,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:08,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039742888] [2024-06-21 20:48:08,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039742888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:08,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:08,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:48:08,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080242629] [2024-06-21 20:48:08,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:08,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:48:08,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:08,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:48:08,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:48:09,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:48:09,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 562 places, 505 transitions, 5493 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:09,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:09,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:48:09,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:09,765 INFO L124 PetriNetUnfolderBase]: 1255/2348 cut-off events. [2024-06-21 20:48:09,765 INFO L125 PetriNetUnfolderBase]: For 427844/427844 co-relation queries the response was YES. [2024-06-21 20:48:09,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15417 conditions, 2348 events. 1255/2348 cut-off events. For 427844/427844 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 15357 event pairs, 115 based on Foata normal form. 2/2349 useless extension candidates. Maximal degree in co-relation 15200. Up to 1564 conditions per place. [2024-06-21 20:48:09,803 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 341 selfloop transitions, 184 changer transitions 0/527 dead transitions. [2024-06-21 20:48:09,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 527 transitions, 6611 flow [2024-06-21 20:48:09,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:48:09,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:48:09,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 146 transitions. [2024-06-21 20:48:09,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3802083333333333 [2024-06-21 20:48:09,804 INFO L175 Difference]: Start difference. First operand has 562 places, 505 transitions, 5493 flow. Second operand 12 states and 146 transitions. [2024-06-21 20:48:09,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 527 transitions, 6611 flow [2024-06-21 20:48:12,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 545 places, 527 transitions, 6165 flow, removed 15 selfloop flow, removed 16 redundant places. [2024-06-21 20:48:12,133 INFO L231 Difference]: Finished difference. Result has 546 places, 506 transitions, 5434 flow [2024-06-21 20:48:12,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=5047, PETRI_DIFFERENCE_MINUEND_PLACES=534, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5434, PETRI_PLACES=546, PETRI_TRANSITIONS=506} [2024-06-21 20:48:12,133 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 515 predicate places. [2024-06-21 20:48:12,134 INFO L495 AbstractCegarLoop]: Abstraction has has 546 places, 506 transitions, 5434 flow [2024-06-21 20:48:12,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:12,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:12,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:12,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241 [2024-06-21 20:48:12,134 INFO L420 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:48:12,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:12,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1215059666, now seen corresponding path program 15 times [2024-06-21 20:48:12,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:12,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527103455] [2024-06-21 20:48:12,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:12,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:12,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:13,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:13,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:13,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527103455] [2024-06-21 20:48:13,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527103455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:13,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:13,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:48:13,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244494152] [2024-06-21 20:48:13,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:13,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:48:13,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:13,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:48:13,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:48:13,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:48:13,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 546 places, 506 transitions, 5434 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:13,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:13,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:48:13,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:14,331 INFO L124 PetriNetUnfolderBase]: 1250/2345 cut-off events. [2024-06-21 20:48:14,331 INFO L125 PetriNetUnfolderBase]: For 464410/464410 co-relation queries the response was YES. [2024-06-21 20:48:14,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13298 conditions, 2345 events. 1250/2345 cut-off events. For 464410/464410 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 15356 event pairs, 110 based on Foata normal form. 16/2360 useless extension candidates. Maximal degree in co-relation 13086. Up to 1445 conditions per place. [2024-06-21 20:48:14,368 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 329 selfloop transitions, 171 changer transitions 31/533 dead transitions. [2024-06-21 20:48:14,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 558 places, 533 transitions, 6710 flow [2024-06-21 20:48:14,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:48:14,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:48:14,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 160 transitions. [2024-06-21 20:48:14,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38461538461538464 [2024-06-21 20:48:14,369 INFO L175 Difference]: Start difference. First operand has 546 places, 506 transitions, 5434 flow. Second operand 13 states and 160 transitions. [2024-06-21 20:48:14,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 558 places, 533 transitions, 6710 flow [2024-06-21 20:48:15,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 548 places, 533 transitions, 6339 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 20:48:15,751 INFO L231 Difference]: Finished difference. Result has 549 places, 485 transitions, 5230 flow [2024-06-21 20:48:15,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=5063, PETRI_DIFFERENCE_MINUEND_PLACES=536, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5230, PETRI_PLACES=549, PETRI_TRANSITIONS=485} [2024-06-21 20:48:15,751 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 518 predicate places. [2024-06-21 20:48:15,751 INFO L495 AbstractCegarLoop]: Abstraction has has 549 places, 485 transitions, 5230 flow [2024-06-21 20:48:15,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:15,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:15,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:15,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242 [2024-06-21 20:48:15,751 INFO L420 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:48:15,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:15,752 INFO L85 PathProgramCache]: Analyzing trace with hash 660588848, now seen corresponding path program 3 times [2024-06-21 20:48:15,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:15,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759841703] [2024-06-21 20:48:15,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:15,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:15,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:16,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:16,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:16,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759841703] [2024-06-21 20:48:16,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759841703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:16,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:16,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:48:16,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254307093] [2024-06-21 20:48:16,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:16,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:48:16,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:16,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:48:16,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:48:17,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:48:17,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 549 places, 485 transitions, 5230 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:17,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:17,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:48:17,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:17,742 INFO L124 PetriNetUnfolderBase]: 1170/2213 cut-off events. [2024-06-21 20:48:17,742 INFO L125 PetriNetUnfolderBase]: For 337543/337543 co-relation queries the response was YES. [2024-06-21 20:48:17,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12481 conditions, 2213 events. 1170/2213 cut-off events. For 337543/337543 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 14482 event pairs, 96 based on Foata normal form. 8/2220 useless extension candidates. Maximal degree in co-relation 12268. Up to 1429 conditions per place. [2024-06-21 20:48:17,771 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 325 selfloop transitions, 159 changer transitions 23/509 dead transitions. [2024-06-21 20:48:17,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 509 transitions, 6392 flow [2024-06-21 20:48:17,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:48:17,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:48:17,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 146 transitions. [2024-06-21 20:48:17,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3802083333333333 [2024-06-21 20:48:17,772 INFO L175 Difference]: Start difference. First operand has 549 places, 485 transitions, 5230 flow. Second operand 12 states and 146 transitions. [2024-06-21 20:48:17,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 509 transitions, 6392 flow [2024-06-21 20:48:19,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 537 places, 509 transitions, 5954 flow, removed 9 selfloop flow, removed 16 redundant places. [2024-06-21 20:48:19,064 INFO L231 Difference]: Finished difference. Result has 538 places, 472 transitions, 4984 flow [2024-06-21 20:48:19,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4796, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4984, PETRI_PLACES=538, PETRI_TRANSITIONS=472} [2024-06-21 20:48:19,065 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 507 predicate places. [2024-06-21 20:48:19,065 INFO L495 AbstractCegarLoop]: Abstraction has has 538 places, 472 transitions, 4984 flow [2024-06-21 20:48:19,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:19,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:19,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:19,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243 [2024-06-21 20:48:19,065 INFO L420 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:48:19,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:19,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1267597544, now seen corresponding path program 16 times [2024-06-21 20:48:19,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:19,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390180655] [2024-06-21 20:48:19,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:19,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:19,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:20,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:20,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:20,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390180655] [2024-06-21 20:48:20,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390180655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:20,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:20,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:48:20,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541834551] [2024-06-21 20:48:20,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:20,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:48:20,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:20,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:48:20,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:48:20,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:48:20,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 538 places, 472 transitions, 4984 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:20,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:20,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:48:20,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:21,098 INFO L124 PetriNetUnfolderBase]: 1154/2177 cut-off events. [2024-06-21 20:48:21,098 INFO L125 PetriNetUnfolderBase]: For 326619/326619 co-relation queries the response was YES. [2024-06-21 20:48:21,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12023 conditions, 2177 events. 1154/2177 cut-off events. For 326619/326619 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 14155 event pairs, 229 based on Foata normal form. 8/2184 useless extension candidates. Maximal degree in co-relation 11814. Up to 1727 conditions per place. [2024-06-21 20:48:21,132 INFO L140 encePairwiseOnDemand]: 18/32 looper letters, 391 selfloop transitions, 90 changer transitions 20/503 dead transitions. [2024-06-21 20:48:21,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 503 transitions, 6152 flow [2024-06-21 20:48:21,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 20:48:21,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 20:48:21,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 157 transitions. [2024-06-21 20:48:21,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35044642857142855 [2024-06-21 20:48:21,133 INFO L175 Difference]: Start difference. First operand has 538 places, 472 transitions, 4984 flow. Second operand 14 states and 157 transitions. [2024-06-21 20:48:21,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 503 transitions, 6152 flow [2024-06-21 20:48:22,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 503 transitions, 5822 flow, removed 6 selfloop flow, removed 13 redundant places. [2024-06-21 20:48:22,348 INFO L231 Difference]: Finished difference. Result has 530 places, 467 transitions, 4788 flow [2024-06-21 20:48:22,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4654, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4788, PETRI_PLACES=530, PETRI_TRANSITIONS=467} [2024-06-21 20:48:22,348 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 499 predicate places. [2024-06-21 20:48:22,349 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 467 transitions, 4788 flow [2024-06-21 20:48:22,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:22,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:22,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:22,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244 [2024-06-21 20:48:22,349 INFO L420 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:48:22,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:22,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1422117602, now seen corresponding path program 4 times [2024-06-21 20:48:22,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:22,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731653389] [2024-06-21 20:48:22,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:22,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:22,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:23,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:23,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:23,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731653389] [2024-06-21 20:48:23,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731653389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:23,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:23,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:48:23,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548166803] [2024-06-21 20:48:23,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:23,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:48:23,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:23,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:48:23,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:48:23,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:48:23,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 467 transitions, 4788 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:23,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:23,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:48:23,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:24,662 INFO L124 PetriNetUnfolderBase]: 1131/2125 cut-off events. [2024-06-21 20:48:24,662 INFO L125 PetriNetUnfolderBase]: For 220365/220365 co-relation queries the response was YES. [2024-06-21 20:48:24,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11526 conditions, 2125 events. 1131/2125 cut-off events. For 220365/220365 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 13774 event pairs, 112 based on Foata normal form. 2/2126 useless extension candidates. Maximal degree in co-relation 11320. Up to 1414 conditions per place. [2024-06-21 20:48:24,686 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 341 selfloop transitions, 144 changer transitions 0/487 dead transitions. [2024-06-21 20:48:24,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 487 transitions, 5818 flow [2024-06-21 20:48:24,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:48:24,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:48:24,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 143 transitions. [2024-06-21 20:48:24,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3723958333333333 [2024-06-21 20:48:24,688 INFO L175 Difference]: Start difference. First operand has 530 places, 467 transitions, 4788 flow. Second operand 12 states and 143 transitions. [2024-06-21 20:48:24,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 487 transitions, 5818 flow [2024-06-21 20:48:25,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 487 transitions, 5532 flow, removed 3 selfloop flow, removed 13 redundant places. [2024-06-21 20:48:25,857 INFO L231 Difference]: Finished difference. Result has 520 places, 468 transitions, 4806 flow [2024-06-21 20:48:25,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4502, PETRI_DIFFERENCE_MINUEND_PLACES=508, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4806, PETRI_PLACES=520, PETRI_TRANSITIONS=468} [2024-06-21 20:48:25,858 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 489 predicate places. [2024-06-21 20:48:25,858 INFO L495 AbstractCegarLoop]: Abstraction has has 520 places, 468 transitions, 4806 flow [2024-06-21 20:48:25,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:25,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:25,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:25,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable245 [2024-06-21 20:48:25,858 INFO L420 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:48:25,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:25,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1421829302, now seen corresponding path program 5 times [2024-06-21 20:48:25,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:25,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052107980] [2024-06-21 20:48:25,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:25,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:25,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:27,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:27,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:27,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052107980] [2024-06-21 20:48:27,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052107980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:27,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:27,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:48:27,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275736052] [2024-06-21 20:48:27,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:27,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:48:27,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:27,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:48:27,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:48:27,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:48:27,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 468 transitions, 4806 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:27,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:27,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:48:27,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:28,038 INFO L124 PetriNetUnfolderBase]: 1142/2146 cut-off events. [2024-06-21 20:48:28,038 INFO L125 PetriNetUnfolderBase]: For 253670/253670 co-relation queries the response was YES. [2024-06-21 20:48:28,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12015 conditions, 2146 events. 1142/2146 cut-off events. For 253670/253670 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 13940 event pairs, 121 based on Foata normal form. 2/2147 useless extension candidates. Maximal degree in co-relation 11811. Up to 1374 conditions per place. [2024-06-21 20:48:28,064 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 344 selfloop transitions, 144 changer transitions 0/490 dead transitions. [2024-06-21 20:48:28,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 490 transitions, 6212 flow [2024-06-21 20:48:28,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:48:28,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:48:28,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 146 transitions. [2024-06-21 20:48:28,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3802083333333333 [2024-06-21 20:48:28,065 INFO L175 Difference]: Start difference. First operand has 520 places, 468 transitions, 4806 flow. Second operand 12 states and 146 transitions. [2024-06-21 20:48:28,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 490 transitions, 6212 flow [2024-06-21 20:48:29,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 490 transitions, 5898 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-21 20:48:29,443 INFO L231 Difference]: Finished difference. Result has 521 places, 470 transitions, 4810 flow [2024-06-21 20:48:29,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4492, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4810, PETRI_PLACES=521, PETRI_TRANSITIONS=470} [2024-06-21 20:48:29,443 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 490 predicate places. [2024-06-21 20:48:29,443 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 470 transitions, 4810 flow [2024-06-21 20:48:29,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:29,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:29,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:29,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable246 [2024-06-21 20:48:29,443 INFO L420 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:48:29,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:29,444 INFO L85 PathProgramCache]: Analyzing trace with hash 753093196, now seen corresponding path program 17 times [2024-06-21 20:48:29,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:29,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308084164] [2024-06-21 20:48:29,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:29,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:29,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:30,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:30,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:30,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308084164] [2024-06-21 20:48:30,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308084164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:30,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:30,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:48:30,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696470265] [2024-06-21 20:48:30,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:30,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:48:30,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:30,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:48:30,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:48:30,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:48:30,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 470 transitions, 4810 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:30,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:30,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:48:30,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:31,786 INFO L124 PetriNetUnfolderBase]: 1183/2233 cut-off events. [2024-06-21 20:48:31,786 INFO L125 PetriNetUnfolderBase]: For 502784/502784 co-relation queries the response was YES. [2024-06-21 20:48:31,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14524 conditions, 2233 events. 1183/2233 cut-off events. For 502784/502784 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 14512 event pairs, 130 based on Foata normal form. 8/2240 useless extension candidates. Maximal degree in co-relation 14319. Up to 1394 conditions per place. [2024-06-21 20:48:31,816 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 336 selfloop transitions, 152 changer transitions 9/499 dead transitions. [2024-06-21 20:48:31,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 499 transitions, 6436 flow [2024-06-21 20:48:31,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:48:31,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:48:31,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 163 transitions. [2024-06-21 20:48:31,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3918269230769231 [2024-06-21 20:48:31,817 INFO L175 Difference]: Start difference. First operand has 521 places, 470 transitions, 4810 flow. Second operand 13 states and 163 transitions. [2024-06-21 20:48:31,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 499 transitions, 6436 flow [2024-06-21 20:48:33,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 499 transitions, 6245 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 20:48:33,693 INFO L231 Difference]: Finished difference. Result has 526 places, 466 transitions, 4892 flow [2024-06-21 20:48:33,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4619, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4892, PETRI_PLACES=526, PETRI_TRANSITIONS=466} [2024-06-21 20:48:33,693 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 495 predicate places. [2024-06-21 20:48:33,693 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 466 transitions, 4892 flow [2024-06-21 20:48:33,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:33,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:33,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:33,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247 [2024-06-21 20:48:33,693 INFO L420 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:48:33,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:33,694 INFO L85 PathProgramCache]: Analyzing trace with hash 753097846, now seen corresponding path program 18 times [2024-06-21 20:48:33,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:33,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517138141] [2024-06-21 20:48:33,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:33,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:33,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:34,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:34,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:34,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517138141] [2024-06-21 20:48:34,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517138141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:34,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:34,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:48:34,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557847594] [2024-06-21 20:48:34,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:34,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:48:34,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:34,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:48:34,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:48:34,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:48:34,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 466 transitions, 4892 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:34,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:34,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:48:34,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:35,774 INFO L124 PetriNetUnfolderBase]: 1148/2168 cut-off events. [2024-06-21 20:48:35,775 INFO L125 PetriNetUnfolderBase]: For 384572/384572 co-relation queries the response was YES. [2024-06-21 20:48:35,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12544 conditions, 2168 events. 1148/2168 cut-off events. For 384572/384572 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 14063 event pairs, 119 based on Foata normal form. 10/2177 useless extension candidates. Maximal degree in co-relation 12337. Up to 1346 conditions per place. [2024-06-21 20:48:35,800 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 310 selfloop transitions, 155 changer transitions 23/490 dead transitions. [2024-06-21 20:48:35,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 490 transitions, 6068 flow [2024-06-21 20:48:35,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:48:35,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:48:35,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 159 transitions. [2024-06-21 20:48:35,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38221153846153844 [2024-06-21 20:48:35,801 INFO L175 Difference]: Start difference. First operand has 526 places, 466 transitions, 4892 flow. Second operand 13 states and 159 transitions. [2024-06-21 20:48:35,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 490 transitions, 6068 flow [2024-06-21 20:48:37,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 490 transitions, 5766 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-21 20:48:37,262 INFO L231 Difference]: Finished difference. Result has 525 places, 453 transitions, 4790 flow [2024-06-21 20:48:37,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4590, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4790, PETRI_PLACES=525, PETRI_TRANSITIONS=453} [2024-06-21 20:48:37,262 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 494 predicate places. [2024-06-21 20:48:37,262 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 453 transitions, 4790 flow [2024-06-21 20:48:37,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:37,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:37,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:37,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248 [2024-06-21 20:48:37,263 INFO L420 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:48:37,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:37,263 INFO L85 PathProgramCache]: Analyzing trace with hash 748629196, now seen corresponding path program 19 times [2024-06-21 20:48:37,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:37,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809494191] [2024-06-21 20:48:37,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:37,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:37,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:38,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:38,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:38,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809494191] [2024-06-21 20:48:38,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809494191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:38,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:38,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:48:38,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266715593] [2024-06-21 20:48:38,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:38,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:48:38,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:38,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:48:38,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:48:38,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:48:38,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 453 transitions, 4790 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:38,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:38,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:48:38,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:39,276 INFO L124 PetriNetUnfolderBase]: 1118/2114 cut-off events. [2024-06-21 20:48:39,276 INFO L125 PetriNetUnfolderBase]: For 379254/379254 co-relation queries the response was YES. [2024-06-21 20:48:39,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12305 conditions, 2114 events. 1118/2114 cut-off events. For 379254/379254 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 13619 event pairs, 121 based on Foata normal form. 10/2123 useless extension candidates. Maximal degree in co-relation 12099. Up to 1238 conditions per place. [2024-06-21 20:48:39,307 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 277 selfloop transitions, 183 changer transitions 17/479 dead transitions. [2024-06-21 20:48:39,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 529 places, 479 transitions, 5950 flow [2024-06-21 20:48:39,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 20:48:39,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 20:48:39,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 171 transitions. [2024-06-21 20:48:39,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38169642857142855 [2024-06-21 20:48:39,308 INFO L175 Difference]: Start difference. First operand has 525 places, 453 transitions, 4790 flow. Second operand 14 states and 171 transitions. [2024-06-21 20:48:39,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 529 places, 479 transitions, 5950 flow [2024-06-21 20:48:40,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 479 transitions, 5604 flow, removed 9 selfloop flow, removed 14 redundant places. [2024-06-21 20:48:40,772 INFO L231 Difference]: Finished difference. Result has 516 places, 444 transitions, 4772 flow [2024-06-21 20:48:40,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4448, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4772, PETRI_PLACES=516, PETRI_TRANSITIONS=444} [2024-06-21 20:48:40,772 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 485 predicate places. [2024-06-21 20:48:40,772 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 444 transitions, 4772 flow [2024-06-21 20:48:40,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:40,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:40,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:40,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249 [2024-06-21 20:48:40,773 INFO L420 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:48:40,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:40,773 INFO L85 PathProgramCache]: Analyzing trace with hash 748624546, now seen corresponding path program 20 times [2024-06-21 20:48:40,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:40,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947362748] [2024-06-21 20:48:40,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:40,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:40,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:41,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:41,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:41,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947362748] [2024-06-21 20:48:41,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947362748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:41,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:41,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:48:41,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098642530] [2024-06-21 20:48:41,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:41,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:48:41,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:41,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:48:41,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:48:42,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:48:42,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 444 transitions, 4772 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:42,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:42,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:48:42,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:43,000 INFO L124 PetriNetUnfolderBase]: 1090/2070 cut-off events. [2024-06-21 20:48:43,000 INFO L125 PetriNetUnfolderBase]: For 337992/337992 co-relation queries the response was YES. [2024-06-21 20:48:43,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12019 conditions, 2070 events. 1090/2070 cut-off events. For 337992/337992 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 13397 event pairs, 121 based on Foata normal form. 8/2077 useless extension candidates. Maximal degree in co-relation 11817. Up to 1272 conditions per place. [2024-06-21 20:48:43,047 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 289 selfloop transitions, 162 changer transitions 15/468 dead transitions. [2024-06-21 20:48:43,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 468 transitions, 5828 flow [2024-06-21 20:48:43,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:48:43,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:48:43,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 158 transitions. [2024-06-21 20:48:43,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3798076923076923 [2024-06-21 20:48:43,049 INFO L175 Difference]: Start difference. First operand has 516 places, 444 transitions, 4772 flow. Second operand 13 states and 158 transitions. [2024-06-21 20:48:43,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 468 transitions, 5828 flow [2024-06-21 20:48:44,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 468 transitions, 5434 flow, removed 14 selfloop flow, removed 16 redundant places. [2024-06-21 20:48:44,414 INFO L231 Difference]: Finished difference. Result has 508 places, 437 transitions, 4670 flow [2024-06-21 20:48:44,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4384, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4670, PETRI_PLACES=508, PETRI_TRANSITIONS=437} [2024-06-21 20:48:44,415 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 477 predicate places. [2024-06-21 20:48:44,415 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 437 transitions, 4670 flow [2024-06-21 20:48:44,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:44,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:44,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:44,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250 [2024-06-21 20:48:44,416 INFO L420 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:48:44,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:44,416 INFO L85 PathProgramCache]: Analyzing trace with hash 926006670, now seen corresponding path program 6 times [2024-06-21 20:48:44,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:44,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177496310] [2024-06-21 20:48:44,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:44,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:44,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:45,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:45,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:45,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177496310] [2024-06-21 20:48:45,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177496310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:45,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:45,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:48:45,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626129785] [2024-06-21 20:48:45,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:45,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:48:45,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:45,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:48:45,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:48:45,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:48:45,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 437 transitions, 4670 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:45,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:45,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:48:45,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:46,335 INFO L124 PetriNetUnfolderBase]: 1077/2047 cut-off events. [2024-06-21 20:48:46,335 INFO L125 PetriNetUnfolderBase]: For 322500/322500 co-relation queries the response was YES. [2024-06-21 20:48:46,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11829 conditions, 2047 events. 1077/2047 cut-off events. For 322500/322500 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 13225 event pairs, 119 based on Foata normal form. 8/2054 useless extension candidates. Maximal degree in co-relation 11631. Up to 1321 conditions per place. [2024-06-21 20:48:46,365 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 312 selfloop transitions, 130 changer transitions 16/460 dead transitions. [2024-06-21 20:48:46,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 460 transitions, 5722 flow [2024-06-21 20:48:46,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:48:46,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:48:46,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 150 transitions. [2024-06-21 20:48:46,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.390625 [2024-06-21 20:48:46,366 INFO L175 Difference]: Start difference. First operand has 508 places, 437 transitions, 4670 flow. Second operand 12 states and 150 transitions. [2024-06-21 20:48:46,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 460 transitions, 5722 flow [2024-06-21 20:48:47,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 460 transitions, 5392 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-21 20:48:47,545 INFO L231 Difference]: Finished difference. Result has 501 places, 430 transitions, 4519 flow [2024-06-21 20:48:47,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4340, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4519, PETRI_PLACES=501, PETRI_TRANSITIONS=430} [2024-06-21 20:48:47,545 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 470 predicate places. [2024-06-21 20:48:47,545 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 430 transitions, 4519 flow [2024-06-21 20:48:47,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:47,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:47,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:47,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251 [2024-06-21 20:48:47,546 INFO L420 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:48:47,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:47,546 INFO L85 PathProgramCache]: Analyzing trace with hash 748509226, now seen corresponding path program 21 times [2024-06-21 20:48:47,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:47,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990484932] [2024-06-21 20:48:47,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:47,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:47,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:48,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:48,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:48,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990484932] [2024-06-21 20:48:48,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990484932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:48,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:48,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:48:48,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681172042] [2024-06-21 20:48:48,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:48,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:48:48,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:48,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:48:48,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:48:48,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:48:48,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 430 transitions, 4519 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:48,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:48,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:48:48,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:49,636 INFO L124 PetriNetUnfolderBase]: 1090/2074 cut-off events. [2024-06-21 20:48:49,636 INFO L125 PetriNetUnfolderBase]: For 459211/459211 co-relation queries the response was YES. [2024-06-21 20:48:49,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13741 conditions, 2074 events. 1090/2074 cut-off events. For 459211/459211 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 13325 event pairs, 130 based on Foata normal form. 8/2081 useless extension candidates. Maximal degree in co-relation 13545. Up to 1172 conditions per place. [2024-06-21 20:48:49,668 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 290 selfloop transitions, 150 changer transitions 18/460 dead transitions. [2024-06-21 20:48:49,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 460 transitions, 6029 flow [2024-06-21 20:48:49,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:48:49,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:48:49,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 164 transitions. [2024-06-21 20:48:49,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3942307692307692 [2024-06-21 20:48:49,669 INFO L175 Difference]: Start difference. First operand has 501 places, 430 transitions, 4519 flow. Second operand 13 states and 164 transitions. [2024-06-21 20:48:49,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 460 transitions, 6029 flow [2024-06-21 20:48:51,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 460 transitions, 5761 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 20:48:51,188 INFO L231 Difference]: Finished difference. Result has 499 places, 419 transitions, 4444 flow [2024-06-21 20:48:51,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4255, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4444, PETRI_PLACES=499, PETRI_TRANSITIONS=419} [2024-06-21 20:48:51,188 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 468 predicate places. [2024-06-21 20:48:51,188 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 419 transitions, 4444 flow [2024-06-21 20:48:51,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:51,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:51,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:51,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252 [2024-06-21 20:48:51,188 INFO L420 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:48:51,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:51,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1703837766, now seen corresponding path program 22 times [2024-06-21 20:48:51,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:51,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770331777] [2024-06-21 20:48:51,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:51,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:51,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:52,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:52,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:52,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770331777] [2024-06-21 20:48:52,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770331777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:52,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:52,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:48:52,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251394140] [2024-06-21 20:48:52,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:52,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:48:52,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:52,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:48:52,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:48:52,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:48:52,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 419 transitions, 4444 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:52,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:52,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:48:52,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:52,998 INFO L124 PetriNetUnfolderBase]: 1074/2042 cut-off events. [2024-06-21 20:48:52,998 INFO L125 PetriNetUnfolderBase]: For 484271/484271 co-relation queries the response was YES. [2024-06-21 20:48:53,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13732 conditions, 2042 events. 1074/2042 cut-off events. For 484271/484271 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 13023 event pairs, 132 based on Foata normal form. 10/2051 useless extension candidates. Maximal degree in co-relation 13537. Up to 1256 conditions per place. [2024-06-21 20:48:53,028 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 279 selfloop transitions, 147 changer transitions 15/443 dead transitions. [2024-06-21 20:48:53,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 443 transitions, 5510 flow [2024-06-21 20:48:53,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:48:53,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:48:53,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 160 transitions. [2024-06-21 20:48:53,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38461538461538464 [2024-06-21 20:48:53,029 INFO L175 Difference]: Start difference. First operand has 499 places, 419 transitions, 4444 flow. Second operand 13 states and 160 transitions. [2024-06-21 20:48:53,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 443 transitions, 5510 flow [2024-06-21 20:48:54,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 443 transitions, 5214 flow, removed 7 selfloop flow, removed 14 redundant places. [2024-06-21 20:48:54,752 INFO L231 Difference]: Finished difference. Result has 492 places, 412 transitions, 4396 flow [2024-06-21 20:48:54,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4150, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4396, PETRI_PLACES=492, PETRI_TRANSITIONS=412} [2024-06-21 20:48:54,752 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 461 predicate places. [2024-06-21 20:48:54,752 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 412 transitions, 4396 flow [2024-06-21 20:48:54,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:54,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:54,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:54,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253 [2024-06-21 20:48:54,753 INFO L420 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:48:54,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:54,753 INFO L85 PathProgramCache]: Analyzing trace with hash 919326976, now seen corresponding path program 23 times [2024-06-21 20:48:54,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:54,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305678645] [2024-06-21 20:48:54,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:54,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:54,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:55,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:55,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:55,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305678645] [2024-06-21 20:48:55,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305678645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:55,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:55,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:48:55,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726900914] [2024-06-21 20:48:55,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:55,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:48:55,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:55,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:48:55,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:48:56,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:48:56,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 412 transitions, 4396 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:56,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:56,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:48:56,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:48:56,711 INFO L124 PetriNetUnfolderBase]: 1046/1998 cut-off events. [2024-06-21 20:48:56,711 INFO L125 PetriNetUnfolderBase]: For 431435/431435 co-relation queries the response was YES. [2024-06-21 20:48:56,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13354 conditions, 1998 events. 1046/1998 cut-off events. For 431435/431435 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 12751 event pairs, 138 based on Foata normal form. 8/2005 useless extension candidates. Maximal degree in co-relation 13163. Up to 1290 conditions per place. [2024-06-21 20:48:56,741 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 289 selfloop transitions, 120 changer transitions 24/435 dead transitions. [2024-06-21 20:48:56,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 435 transitions, 5376 flow [2024-06-21 20:48:56,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:48:56,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:48:56,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 155 transitions. [2024-06-21 20:48:56,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37259615384615385 [2024-06-21 20:48:56,742 INFO L175 Difference]: Start difference. First operand has 492 places, 412 transitions, 4396 flow. Second operand 13 states and 155 transitions. [2024-06-21 20:48:56,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 435 transitions, 5376 flow [2024-06-21 20:48:58,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 435 transitions, 5078 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-21 20:48:58,413 INFO L231 Difference]: Finished difference. Result has 490 places, 398 transitions, 4175 flow [2024-06-21 20:48:58,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=4098, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4175, PETRI_PLACES=490, PETRI_TRANSITIONS=398} [2024-06-21 20:48:58,413 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 459 predicate places. [2024-06-21 20:48:58,413 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 398 transitions, 4175 flow [2024-06-21 20:48:58,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:58,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:48:58,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:48:58,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254 [2024-06-21 20:48:58,414 INFO L420 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:48:58,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:48:58,414 INFO L85 PathProgramCache]: Analyzing trace with hash -672529750, now seen corresponding path program 24 times [2024-06-21 20:48:58,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:48:58,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049962348] [2024-06-21 20:48:58,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:48:58,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:48:58,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:48:59,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:48:59,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:48:59,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049962348] [2024-06-21 20:48:59,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049962348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:48:59,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:48:59,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:48:59,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107072180] [2024-06-21 20:48:59,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:48:59,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:48:59,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:48:59,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:48:59,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:48:59,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:48:59,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 398 transitions, 4175 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:48:59,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:48:59,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:48:59,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:00,384 INFO L124 PetriNetUnfolderBase]: 1021/1943 cut-off events. [2024-06-21 20:49:00,385 INFO L125 PetriNetUnfolderBase]: For 426876/426876 co-relation queries the response was YES. [2024-06-21 20:49:00,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12593 conditions, 1943 events. 1021/1943 cut-off events. For 426876/426876 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 12247 event pairs, 131 based on Foata normal form. 10/1952 useless extension candidates. Maximal degree in co-relation 12403. Up to 1184 conditions per place. [2024-06-21 20:49:00,408 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 264 selfloop transitions, 141 changer transitions 15/422 dead transitions. [2024-06-21 20:49:00,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 422 transitions, 5197 flow [2024-06-21 20:49:00,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:49:00,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:49:00,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 157 transitions. [2024-06-21 20:49:00,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37740384615384615 [2024-06-21 20:49:00,409 INFO L175 Difference]: Start difference. First operand has 490 places, 398 transitions, 4175 flow. Second operand 13 states and 157 transitions. [2024-06-21 20:49:00,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 422 transitions, 5197 flow [2024-06-21 20:49:01,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 422 transitions, 4887 flow, removed 10 selfloop flow, removed 18 redundant places. [2024-06-21 20:49:01,775 INFO L231 Difference]: Finished difference. Result has 475 places, 391 transitions, 4109 flow [2024-06-21 20:49:01,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3869, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4109, PETRI_PLACES=475, PETRI_TRANSITIONS=391} [2024-06-21 20:49:01,776 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 444 predicate places. [2024-06-21 20:49:01,776 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 391 transitions, 4109 flow [2024-06-21 20:49:01,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:01,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:01,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:01,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable255 [2024-06-21 20:49:01,777 INFO L420 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:49:01,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:01,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1658485906, now seen corresponding path program 25 times [2024-06-21 20:49:01,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:01,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948754808] [2024-06-21 20:49:01,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:01,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:01,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:02,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:02,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:02,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948754808] [2024-06-21 20:49:02,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948754808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:02,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:02,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:49:02,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025330341] [2024-06-21 20:49:02,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:02,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:49:02,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:02,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:49:02,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:49:03,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:49:03,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 391 transitions, 4109 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:03,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:03,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:49:03,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:03,732 INFO L124 PetriNetUnfolderBase]: 971/1853 cut-off events. [2024-06-21 20:49:03,732 INFO L125 PetriNetUnfolderBase]: For 275507/275507 co-relation queries the response was YES. [2024-06-21 20:49:03,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10652 conditions, 1853 events. 971/1853 cut-off events. For 275507/275507 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 11713 event pairs, 119 based on Foata normal form. 8/1860 useless extension candidates. Maximal degree in co-relation 10467. Up to 1172 conditions per place. [2024-06-21 20:49:03,758 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 275 selfloop transitions, 118 changer transitions 19/414 dead transitions. [2024-06-21 20:49:03,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 414 transitions, 5047 flow [2024-06-21 20:49:03,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:49:03,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:49:03,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 152 transitions. [2024-06-21 20:49:03,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36538461538461536 [2024-06-21 20:49:03,760 INFO L175 Difference]: Start difference. First operand has 475 places, 391 transitions, 4109 flow. Second operand 13 states and 152 transitions. [2024-06-21 20:49:03,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 414 transitions, 5047 flow [2024-06-21 20:49:04,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 414 transitions, 4656 flow, removed 7 selfloop flow, removed 14 redundant places. [2024-06-21 20:49:04,618 INFO L231 Difference]: Finished difference. Result has 471 places, 381 transitions, 3866 flow [2024-06-21 20:49:04,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3722, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3866, PETRI_PLACES=471, PETRI_TRANSITIONS=381} [2024-06-21 20:49:04,618 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 440 predicate places. [2024-06-21 20:49:04,618 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 381 transitions, 3866 flow [2024-06-21 20:49:04,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:04,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:04,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:04,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable256 [2024-06-21 20:49:04,619 INFO L420 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:49:04,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:04,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1651806212, now seen corresponding path program 7 times [2024-06-21 20:49:04,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:04,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628917971] [2024-06-21 20:49:04,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:04,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:04,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:05,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:05,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:05,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628917971] [2024-06-21 20:49:05,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628917971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:05,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:05,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:49:05,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280606867] [2024-06-21 20:49:05,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:05,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:49:05,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:05,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:49:05,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:49:05,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:49:05,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 381 transitions, 3866 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:05,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:05,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:49:05,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:06,370 INFO L124 PetriNetUnfolderBase]: 948/1808 cut-off events. [2024-06-21 20:49:06,370 INFO L125 PetriNetUnfolderBase]: For 246208/246208 co-relation queries the response was YES. [2024-06-21 20:49:06,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9868 conditions, 1808 events. 948/1808 cut-off events. For 246208/246208 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 11369 event pairs, 114 based on Foata normal form. 8/1815 useless extension candidates. Maximal degree in co-relation 9685. Up to 1145 conditions per place. [2024-06-21 20:49:06,393 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 270 selfloop transitions, 112 changer transitions 19/403 dead transitions. [2024-06-21 20:49:06,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 403 transitions, 4784 flow [2024-06-21 20:49:06,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:49:06,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:49:06,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 144 transitions. [2024-06-21 20:49:06,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 20:49:06,394 INFO L175 Difference]: Start difference. First operand has 471 places, 381 transitions, 3866 flow. Second operand 12 states and 144 transitions. [2024-06-21 20:49:06,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 403 transitions, 4784 flow [2024-06-21 20:49:07,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 403 transitions, 4470 flow, removed 14 selfloop flow, removed 13 redundant places. [2024-06-21 20:49:07,218 INFO L231 Difference]: Finished difference. Result has 458 places, 370 transitions, 3674 flow [2024-06-21 20:49:07,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3558, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3674, PETRI_PLACES=458, PETRI_TRANSITIONS=370} [2024-06-21 20:49:07,218 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 427 predicate places. [2024-06-21 20:49:07,218 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 370 transitions, 3674 flow [2024-06-21 20:49:07,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:07,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:07,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:07,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable257 [2024-06-21 20:49:07,219 INFO L420 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:49:07,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:07,219 INFO L85 PathProgramCache]: Analyzing trace with hash 335360014, now seen corresponding path program 8 times [2024-06-21 20:49:07,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:07,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2462930] [2024-06-21 20:49:07,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:07,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:07,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:08,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:08,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:08,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2462930] [2024-06-21 20:49:08,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2462930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:08,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:08,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:49:08,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235544849] [2024-06-21 20:49:08,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:08,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:49:08,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:08,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:49:08,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:49:08,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:49:08,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 370 transitions, 3674 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:08,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:08,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:49:08,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:09,344 INFO L124 PetriNetUnfolderBase]: 937/1783 cut-off events. [2024-06-21 20:49:09,344 INFO L125 PetriNetUnfolderBase]: For 288593/288593 co-relation queries the response was YES. [2024-06-21 20:49:09,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9636 conditions, 1783 events. 937/1783 cut-off events. For 288593/288593 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 11125 event pairs, 120 based on Foata normal form. 12/1794 useless extension candidates. Maximal degree in co-relation 9457. Up to 1123 conditions per place. [2024-06-21 20:49:09,367 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 263 selfloop transitions, 113 changer transitions 18/396 dead transitions. [2024-06-21 20:49:09,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 396 transitions, 4646 flow [2024-06-21 20:49:09,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:49:09,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:49:09,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 166 transitions. [2024-06-21 20:49:09,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39903846153846156 [2024-06-21 20:49:09,367 INFO L175 Difference]: Start difference. First operand has 458 places, 370 transitions, 3674 flow. Second operand 13 states and 166 transitions. [2024-06-21 20:49:09,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 396 transitions, 4646 flow [2024-06-21 20:49:10,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 396 transitions, 4348 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-21 20:49:10,088 INFO L231 Difference]: Finished difference. Result has 452 places, 363 transitions, 3557 flow [2024-06-21 20:49:10,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3378, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3557, PETRI_PLACES=452, PETRI_TRANSITIONS=363} [2024-06-21 20:49:10,088 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 421 predicate places. [2024-06-21 20:49:10,088 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 363 transitions, 3557 flow [2024-06-21 20:49:10,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:10,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:10,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:10,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258 [2024-06-21 20:49:10,089 INFO L420 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:49:10,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:10,089 INFO L85 PathProgramCache]: Analyzing trace with hash 335175440, now seen corresponding path program 26 times [2024-06-21 20:49:10,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:10,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279551435] [2024-06-21 20:49:10,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:10,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:10,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:11,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:11,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:11,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279551435] [2024-06-21 20:49:11,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279551435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:11,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:11,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:49:11,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612066777] [2024-06-21 20:49:11,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:11,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:49:11,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:11,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:49:11,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:49:11,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:49:11,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 363 transitions, 3557 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:11,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:11,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:49:11,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:11,971 INFO L124 PetriNetUnfolderBase]: 936/1792 cut-off events. [2024-06-21 20:49:11,971 INFO L125 PetriNetUnfolderBase]: For 352443/352443 co-relation queries the response was YES. [2024-06-21 20:49:11,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11148 conditions, 1792 events. 936/1792 cut-off events. For 352443/352443 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 11125 event pairs, 129 based on Foata normal form. 8/1799 useless extension candidates. Maximal degree in co-relation 10971. Up to 1060 conditions per place. [2024-06-21 20:49:11,994 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 264 selfloop transitions, 119 changer transitions 7/392 dead transitions. [2024-06-21 20:49:11,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 392 transitions, 4869 flow [2024-06-21 20:49:11,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:49:11,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:49:11,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 168 transitions. [2024-06-21 20:49:11,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40384615384615385 [2024-06-21 20:49:11,995 INFO L175 Difference]: Start difference. First operand has 452 places, 363 transitions, 3557 flow. Second operand 13 states and 168 transitions. [2024-06-21 20:49:11,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 392 transitions, 4869 flow [2024-06-21 20:49:13,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 392 transitions, 4625 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-21 20:49:13,025 INFO L231 Difference]: Finished difference. Result has 449 places, 361 transitions, 3553 flow [2024-06-21 20:49:13,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3323, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3553, PETRI_PLACES=449, PETRI_TRANSITIONS=361} [2024-06-21 20:49:13,025 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 418 predicate places. [2024-06-21 20:49:13,026 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 361 transitions, 3553 flow [2024-06-21 20:49:13,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:13,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:13,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:13,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259 [2024-06-21 20:49:13,026 INFO L420 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:49:13,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:13,026 INFO L85 PathProgramCache]: Analyzing trace with hash 245420440, now seen corresponding path program 27 times [2024-06-21 20:49:13,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:13,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654661354] [2024-06-21 20:49:13,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:13,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:13,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:14,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:14,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:14,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654661354] [2024-06-21 20:49:14,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654661354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:14,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:14,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:49:14,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725705825] [2024-06-21 20:49:14,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:14,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:49:14,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:14,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:49:14,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:49:14,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:49:14,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 361 transitions, 3553 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:14,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:14,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:49:14,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:14,978 INFO L124 PetriNetUnfolderBase]: 934/1790 cut-off events. [2024-06-21 20:49:14,979 INFO L125 PetriNetUnfolderBase]: For 372702/372702 co-relation queries the response was YES. [2024-06-21 20:49:14,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11201 conditions, 1790 events. 934/1790 cut-off events. For 372702/372702 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 11096 event pairs, 137 based on Foata normal form. 10/1799 useless extension candidates. Maximal degree in co-relation 11025. Up to 1083 conditions per place. [2024-06-21 20:49:15,000 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 244 selfloop transitions, 125 changer transitions 15/386 dead transitions. [2024-06-21 20:49:15,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 386 transitions, 4485 flow [2024-06-21 20:49:15,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:49:15,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:49:15,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 167 transitions. [2024-06-21 20:49:15,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4014423076923077 [2024-06-21 20:49:15,001 INFO L175 Difference]: Start difference. First operand has 449 places, 361 transitions, 3553 flow. Second operand 13 states and 167 transitions. [2024-06-21 20:49:15,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 386 transitions, 4485 flow [2024-06-21 20:49:16,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 386 transitions, 4249 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-21 20:49:16,238 INFO L231 Difference]: Finished difference. Result has 448 places, 354 transitions, 3502 flow [2024-06-21 20:49:16,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3317, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3502, PETRI_PLACES=448, PETRI_TRANSITIONS=354} [2024-06-21 20:49:16,238 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 417 predicate places. [2024-06-21 20:49:16,238 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 354 transitions, 3502 flow [2024-06-21 20:49:16,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:16,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:16,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:16,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260 [2024-06-21 20:49:16,239 INFO L420 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:49:16,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:16,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1758945138, now seen corresponding path program 9 times [2024-06-21 20:49:16,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:16,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197263052] [2024-06-21 20:49:16,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:16,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:16,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:17,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:17,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:17,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197263052] [2024-06-21 20:49:17,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197263052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:17,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:17,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:49:17,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837225699] [2024-06-21 20:49:17,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:17,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:49:17,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:17,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:49:17,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:49:17,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:49:17,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 354 transitions, 3502 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:17,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:17,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:49:17,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:18,390 INFO L124 PetriNetUnfolderBase]: 945/1807 cut-off events. [2024-06-21 20:49:18,390 INFO L125 PetriNetUnfolderBase]: For 341764/341764 co-relation queries the response was YES. [2024-06-21 20:49:18,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11180 conditions, 1807 events. 945/1807 cut-off events. For 341764/341764 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 11219 event pairs, 229 based on Foata normal form. 8/1814 useless extension candidates. Maximal degree in co-relation 11005. Up to 1389 conditions per place. [2024-06-21 20:49:18,416 INFO L140 encePairwiseOnDemand]: 18/32 looper letters, 298 selfloop transitions, 77 changer transitions 12/389 dead transitions. [2024-06-21 20:49:18,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 389 transitions, 4463 flow [2024-06-21 20:49:18,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 20:49:18,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 20:49:18,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 164 transitions. [2024-06-21 20:49:18,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-21 20:49:18,417 INFO L175 Difference]: Start difference. First operand has 448 places, 354 transitions, 3502 flow. Second operand 14 states and 164 transitions. [2024-06-21 20:49:18,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 389 transitions, 4463 flow [2024-06-21 20:49:19,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 389 transitions, 4187 flow, removed 8 selfloop flow, removed 13 redundant places. [2024-06-21 20:49:19,435 INFO L231 Difference]: Finished difference. Result has 448 places, 363 transitions, 3484 flow [2024-06-21 20:49:19,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3240, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3484, PETRI_PLACES=448, PETRI_TRANSITIONS=363} [2024-06-21 20:49:19,435 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 417 predicate places. [2024-06-21 20:49:19,435 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 363 transitions, 3484 flow [2024-06-21 20:49:19,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:19,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:19,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:19,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261 [2024-06-21 20:49:19,436 INFO L420 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:49:19,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:19,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1552681404, now seen corresponding path program 28 times [2024-06-21 20:49:19,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:19,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161169941] [2024-06-21 20:49:19,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:19,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:19,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:20,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:20,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:20,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161169941] [2024-06-21 20:49:20,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161169941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:20,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:20,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:49:20,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964754503] [2024-06-21 20:49:20,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:20,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:49:20,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:20,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:49:20,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:49:20,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:49:20,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 363 transitions, 3484 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:20,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:20,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:49:20,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:21,485 INFO L124 PetriNetUnfolderBase]: 964/1848 cut-off events. [2024-06-21 20:49:21,485 INFO L125 PetriNetUnfolderBase]: For 446209/446209 co-relation queries the response was YES. [2024-06-21 20:49:21,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12857 conditions, 1848 events. 964/1848 cut-off events. For 446209/446209 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 11495 event pairs, 138 based on Foata normal form. 8/1855 useless extension candidates. Maximal degree in co-relation 12680. Up to 1050 conditions per place. [2024-06-21 20:49:21,509 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 234 selfloop transitions, 148 changer transitions 9/393 dead transitions. [2024-06-21 20:49:21,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 393 transitions, 4778 flow [2024-06-21 20:49:21,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 20:49:21,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 20:49:21,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 176 transitions. [2024-06-21 20:49:21,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 20:49:21,510 INFO L175 Difference]: Start difference. First operand has 448 places, 363 transitions, 3484 flow. Second operand 14 states and 176 transitions. [2024-06-21 20:49:21,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 393 transitions, 4778 flow [2024-06-21 20:49:22,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 393 transitions, 4683 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 20:49:22,914 INFO L231 Difference]: Finished difference. Result has 452 places, 359 transitions, 3669 flow [2024-06-21 20:49:22,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3391, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3669, PETRI_PLACES=452, PETRI_TRANSITIONS=359} [2024-06-21 20:49:22,915 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 421 predicate places. [2024-06-21 20:49:22,915 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 359 transitions, 3669 flow [2024-06-21 20:49:22,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:22,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:22,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:22,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262 [2024-06-21 20:49:22,915 INFO L420 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:49:22,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:22,915 INFO L85 PathProgramCache]: Analyzing trace with hash 571535374, now seen corresponding path program 10 times [2024-06-21 20:49:22,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:22,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073437627] [2024-06-21 20:49:22,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:22,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:22,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:24,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:24,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:24,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073437627] [2024-06-21 20:49:24,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073437627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:24,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:24,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:49:24,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369174322] [2024-06-21 20:49:24,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:24,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:49:24,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:24,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:49:24,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:49:24,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:49:24,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 359 transitions, 3669 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:24,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:24,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:49:24,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:25,113 INFO L124 PetriNetUnfolderBase]: 944/1808 cut-off events. [2024-06-21 20:49:25,113 INFO L125 PetriNetUnfolderBase]: For 381863/381863 co-relation queries the response was YES. [2024-06-21 20:49:25,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12929 conditions, 1808 events. 944/1808 cut-off events. For 381863/381863 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 11167 event pairs, 155 based on Foata normal form. 2/1809 useless extension candidates. Maximal degree in co-relation 12753. Up to 1199 conditions per place. [2024-06-21 20:49:25,137 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 256 selfloop transitions, 120 changer transitions 0/378 dead transitions. [2024-06-21 20:49:25,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 378 transitions, 4485 flow [2024-06-21 20:49:25,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:49:25,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:49:25,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 151 transitions. [2024-06-21 20:49:25,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932291666666667 [2024-06-21 20:49:25,138 INFO L175 Difference]: Start difference. First operand has 452 places, 359 transitions, 3669 flow. Second operand 12 states and 151 transitions. [2024-06-21 20:49:25,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 378 transitions, 4485 flow [2024-06-21 20:49:26,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 378 transitions, 4187 flow, removed 3 selfloop flow, removed 14 redundant places. [2024-06-21 20:49:26,180 INFO L231 Difference]: Finished difference. Result has 447 places, 360 transitions, 3632 flow [2024-06-21 20:49:26,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3371, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3632, PETRI_PLACES=447, PETRI_TRANSITIONS=360} [2024-06-21 20:49:26,180 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 416 predicate places. [2024-06-21 20:49:26,180 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 360 transitions, 3632 flow [2024-06-21 20:49:26,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:26,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:26,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:26,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263 [2024-06-21 20:49:26,181 INFO L420 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:49:26,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:26,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1405626226, now seen corresponding path program 11 times [2024-06-21 20:49:26,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:26,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264314450] [2024-06-21 20:49:26,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:26,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:26,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:27,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:27,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:27,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264314450] [2024-06-21 20:49:27,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264314450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:27,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:27,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:49:27,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655250249] [2024-06-21 20:49:27,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:27,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:49:27,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:27,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:49:27,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:49:27,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:49:27,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 360 transitions, 3632 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:27,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:27,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:49:27,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:27,956 INFO L124 PetriNetUnfolderBase]: 956/1836 cut-off events. [2024-06-21 20:49:27,956 INFO L125 PetriNetUnfolderBase]: For 432978/432978 co-relation queries the response was YES. [2024-06-21 20:49:27,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12971 conditions, 1836 events. 956/1836 cut-off events. For 432978/432978 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 11353 event pairs, 152 based on Foata normal form. 8/1843 useless extension candidates. Maximal degree in co-relation 12797. Up to 1228 conditions per place. [2024-06-21 20:49:27,980 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 259 selfloop transitions, 106 changer transitions 14/381 dead transitions. [2024-06-21 20:49:27,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 381 transitions, 4504 flow [2024-06-21 20:49:27,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:49:27,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:49:27,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 147 transitions. [2024-06-21 20:49:27,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3828125 [2024-06-21 20:49:27,981 INFO L175 Difference]: Start difference. First operand has 447 places, 360 transitions, 3632 flow. Second operand 12 states and 147 transitions. [2024-06-21 20:49:27,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 381 transitions, 4504 flow [2024-06-21 20:49:29,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 381 transitions, 4255 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-21 20:49:29,118 INFO L231 Difference]: Finished difference. Result has 449 places, 355 transitions, 3535 flow [2024-06-21 20:49:29,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3383, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3535, PETRI_PLACES=449, PETRI_TRANSITIONS=355} [2024-06-21 20:49:29,118 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 418 predicate places. [2024-06-21 20:49:29,118 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 355 transitions, 3535 flow [2024-06-21 20:49:29,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:29,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:29,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:29,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264 [2024-06-21 20:49:29,119 INFO L420 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:49:29,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:29,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1381794400, now seen corresponding path program 12 times [2024-06-21 20:49:29,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:29,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118312126] [2024-06-21 20:49:29,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:29,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:29,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:30,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:30,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:30,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118312126] [2024-06-21 20:49:30,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118312126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:30,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:30,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:49:30,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121767766] [2024-06-21 20:49:30,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:30,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:49:30,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:30,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:49:30,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:49:30,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:49:30,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 355 transitions, 3535 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:30,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:30,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:49:30,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:31,337 INFO L124 PetriNetUnfolderBase]: 952/1828 cut-off events. [2024-06-21 20:49:31,337 INFO L125 PetriNetUnfolderBase]: For 486500/486500 co-relation queries the response was YES. [2024-06-21 20:49:31,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12976 conditions, 1828 events. 952/1828 cut-off events. For 486500/486500 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 11335 event pairs, 156 based on Foata normal form. 12/1839 useless extension candidates. Maximal degree in co-relation 12801. Up to 1196 conditions per place. [2024-06-21 20:49:31,362 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 250 selfloop transitions, 108 changer transitions 21/381 dead transitions. [2024-06-21 20:49:31,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 381 transitions, 4467 flow [2024-06-21 20:49:31,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:49:31,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:49:31,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 165 transitions. [2024-06-21 20:49:31,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39663461538461536 [2024-06-21 20:49:31,363 INFO L175 Difference]: Start difference. First operand has 449 places, 355 transitions, 3535 flow. Second operand 13 states and 165 transitions. [2024-06-21 20:49:31,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 381 transitions, 4467 flow [2024-06-21 20:49:32,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 381 transitions, 4235 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 20:49:32,448 INFO L231 Difference]: Finished difference. Result has 446 places, 345 transitions, 3444 flow [2024-06-21 20:49:32,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3303, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3444, PETRI_PLACES=446, PETRI_TRANSITIONS=345} [2024-06-21 20:49:32,448 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 415 predicate places. [2024-06-21 20:49:32,448 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 345 transitions, 3444 flow [2024-06-21 20:49:32,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:32,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:32,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:32,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265 [2024-06-21 20:49:32,449 INFO L420 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:49:32,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:32,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1758656838, now seen corresponding path program 13 times [2024-06-21 20:49:32,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:32,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100569555] [2024-06-21 20:49:32,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:32,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:32,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:33,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:33,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:33,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100569555] [2024-06-21 20:49:33,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100569555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:33,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:33,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:49:33,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992087541] [2024-06-21 20:49:33,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:33,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:49:33,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:33,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:49:33,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:49:33,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:49:33,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 345 transitions, 3444 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:33,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:33,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:49:33,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:34,313 INFO L124 PetriNetUnfolderBase]: 915/1761 cut-off events. [2024-06-21 20:49:34,313 INFO L125 PetriNetUnfolderBase]: For 393588/393588 co-relation queries the response was YES. [2024-06-21 20:49:34,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12869 conditions, 1761 events. 915/1761 cut-off events. For 393588/393588 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 10852 event pairs, 163 based on Foata normal form. 2/1762 useless extension candidates. Maximal degree in co-relation 12695. Up to 1176 conditions per place. [2024-06-21 20:49:34,337 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 251 selfloop transitions, 112 changer transitions 0/365 dead transitions. [2024-06-21 20:49:34,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 365 transitions, 4544 flow [2024-06-21 20:49:34,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:49:34,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:49:34,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 146 transitions. [2024-06-21 20:49:34,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3802083333333333 [2024-06-21 20:49:34,338 INFO L175 Difference]: Start difference. First operand has 446 places, 345 transitions, 3444 flow. Second operand 12 states and 146 transitions. [2024-06-21 20:49:34,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 365 transitions, 4544 flow [2024-06-21 20:49:35,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 365 transitions, 4302 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-21 20:49:35,565 INFO L231 Difference]: Finished difference. Result has 441 places, 347 transitions, 3468 flow [2024-06-21 20:49:35,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3206, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3468, PETRI_PLACES=441, PETRI_TRANSITIONS=347} [2024-06-21 20:49:35,566 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 410 predicate places. [2024-06-21 20:49:35,566 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 347 transitions, 3468 flow [2024-06-21 20:49:35,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:35,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:35,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:35,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266 [2024-06-21 20:49:35,566 INFO L420 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:49:35,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:35,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1412305920, now seen corresponding path program 29 times [2024-06-21 20:49:35,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:35,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677821250] [2024-06-21 20:49:35,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:35,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:35,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:36,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:36,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:36,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677821250] [2024-06-21 20:49:36,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677821250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:36,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:36,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:49:36,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683646205] [2024-06-21 20:49:36,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:36,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:49:36,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:36,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:49:36,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:49:36,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:49:36,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 347 transitions, 3468 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:36,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:36,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:49:36,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:37,469 INFO L124 PetriNetUnfolderBase]: 956/1848 cut-off events. [2024-06-21 20:49:37,469 INFO L125 PetriNetUnfolderBase]: For 557929/557929 co-relation queries the response was YES. [2024-06-21 20:49:37,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14791 conditions, 1848 events. 956/1848 cut-off events. For 557929/557929 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 11503 event pairs, 176 based on Foata normal form. 8/1855 useless extension candidates. Maximal degree in co-relation 14619. Up to 1190 conditions per place. [2024-06-21 20:49:37,494 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 259 selfloop transitions, 106 changer transitions 7/374 dead transitions. [2024-06-21 20:49:37,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 374 transitions, 4702 flow [2024-06-21 20:49:37,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:49:37,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:49:37,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 160 transitions. [2024-06-21 20:49:37,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38461538461538464 [2024-06-21 20:49:37,495 INFO L175 Difference]: Start difference. First operand has 441 places, 347 transitions, 3468 flow. Second operand 13 states and 160 transitions. [2024-06-21 20:49:37,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 374 transitions, 4702 flow [2024-06-21 20:49:39,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 374 transitions, 4536 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-21 20:49:39,070 INFO L231 Difference]: Finished difference. Result has 446 places, 345 transitions, 3506 flow [2024-06-21 20:49:39,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3302, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3506, PETRI_PLACES=446, PETRI_TRANSITIONS=345} [2024-06-21 20:49:39,071 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 415 predicate places. [2024-06-21 20:49:39,071 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 345 transitions, 3506 flow [2024-06-21 20:49:39,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:39,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:39,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:39,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable267 [2024-06-21 20:49:39,071 INFO L420 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:49:39,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:39,071 INFO L85 PathProgramCache]: Analyzing trace with hash 622004166, now seen corresponding path program 14 times [2024-06-21 20:49:39,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:39,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379408976] [2024-06-21 20:49:39,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:39,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:39,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:40,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:40,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:40,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379408976] [2024-06-21 20:49:40,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379408976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:40,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:40,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:49:40,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456595840] [2024-06-21 20:49:40,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:40,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:49:40,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:40,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:49:40,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:49:40,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:49:40,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 345 transitions, 3506 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:40,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:40,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:49:40,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:41,288 INFO L124 PetriNetUnfolderBase]: 994/1930 cut-off events. [2024-06-21 20:49:41,288 INFO L125 PetriNetUnfolderBase]: For 733941/733941 co-relation queries the response was YES. [2024-06-21 20:49:41,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17911 conditions, 1930 events. 994/1930 cut-off events. For 733941/733941 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 12091 event pairs, 201 based on Foata normal form. 8/1937 useless extension candidates. Maximal degree in co-relation 17737. Up to 1149 conditions per place. [2024-06-21 20:49:41,315 INFO L140 encePairwiseOnDemand]: 18/32 looper letters, 246 selfloop transitions, 119 changer transitions 8/375 dead transitions. [2024-06-21 20:49:41,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 375 transitions, 4772 flow [2024-06-21 20:49:41,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 20:49:41,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 20:49:41,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 179 transitions. [2024-06-21 20:49:41,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39955357142857145 [2024-06-21 20:49:41,316 INFO L175 Difference]: Start difference. First operand has 446 places, 345 transitions, 3506 flow. Second operand 14 states and 179 transitions. [2024-06-21 20:49:41,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 375 transitions, 4772 flow [2024-06-21 20:49:43,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 375 transitions, 4554 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-21 20:49:43,060 INFO L231 Difference]: Finished difference. Result has 446 places, 342 transitions, 3501 flow [2024-06-21 20:49:43,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3292, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3501, PETRI_PLACES=446, PETRI_TRANSITIONS=342} [2024-06-21 20:49:43,060 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 415 predicate places. [2024-06-21 20:49:43,060 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 342 transitions, 3501 flow [2024-06-21 20:49:43,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:43,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:43,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:43,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable268 [2024-06-21 20:49:43,061 INFO L420 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:49:43,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:43,061 INFO L85 PathProgramCache]: Analyzing trace with hash 563254220, now seen corresponding path program 30 times [2024-06-21 20:49:43,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:43,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413983034] [2024-06-21 20:49:43,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:43,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:43,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:44,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:44,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:44,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413983034] [2024-06-21 20:49:44,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413983034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:44,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:44,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:49:44,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321332535] [2024-06-21 20:49:44,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:44,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:49:44,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:44,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:49:44,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:49:44,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:49:44,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 342 transitions, 3501 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:44,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:44,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:49:44,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:45,326 INFO L124 PetriNetUnfolderBase]: 954/1854 cut-off events. [2024-06-21 20:49:45,326 INFO L125 PetriNetUnfolderBase]: For 642258/642258 co-relation queries the response was YES. [2024-06-21 20:49:45,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15096 conditions, 1854 events. 954/1854 cut-off events. For 642258/642258 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 11587 event pairs, 194 based on Foata normal form. 16/1869 useless extension candidates. Maximal degree in co-relation 14923. Up to 1214 conditions per place. [2024-06-21 20:49:45,351 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 244 selfloop transitions, 95 changer transitions 25/366 dead transitions. [2024-06-21 20:49:45,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 366 transitions, 4379 flow [2024-06-21 20:49:45,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:49:45,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:49:45,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 163 transitions. [2024-06-21 20:49:45,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3918269230769231 [2024-06-21 20:49:45,352 INFO L175 Difference]: Start difference. First operand has 446 places, 342 transitions, 3501 flow. Second operand 13 states and 163 transitions. [2024-06-21 20:49:45,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 366 transitions, 4379 flow [2024-06-21 20:49:47,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 366 transitions, 4143 flow, removed 2 selfloop flow, removed 13 redundant places. [2024-06-21 20:49:47,108 INFO L231 Difference]: Finished difference. Result has 444 places, 329 transitions, 3334 flow [2024-06-21 20:49:47,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3265, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3334, PETRI_PLACES=444, PETRI_TRANSITIONS=329} [2024-06-21 20:49:47,109 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 413 predicate places. [2024-06-21 20:49:47,109 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 329 transitions, 3334 flow [2024-06-21 20:49:47,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:47,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:47,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:47,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269 [2024-06-21 20:49:47,109 INFO L420 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:49:47,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:47,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1748825808, now seen corresponding path program 15 times [2024-06-21 20:49:47,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:47,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652566289] [2024-06-21 20:49:47,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:47,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:47,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:48,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:48,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:48,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652566289] [2024-06-21 20:49:48,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652566289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:48,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:48,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:49:48,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324507361] [2024-06-21 20:49:48,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:48,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:49:48,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:48,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:49:48,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:49:48,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:49:48,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 329 transitions, 3334 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:48,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:48,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:49:48,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:48,920 INFO L124 PetriNetUnfolderBase]: 897/1747 cut-off events. [2024-06-21 20:49:48,921 INFO L125 PetriNetUnfolderBase]: For 510468/510468 co-relation queries the response was YES. [2024-06-21 20:49:48,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14705 conditions, 1747 events. 897/1747 cut-off events. For 510468/510468 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 10809 event pairs, 181 based on Foata normal form. 2/1748 useless extension candidates. Maximal degree in co-relation 14533. Up to 1027 conditions per place. [2024-06-21 20:49:48,942 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 238 selfloop transitions, 109 changer transitions 0/349 dead transitions. [2024-06-21 20:49:48,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 349 transitions, 4400 flow [2024-06-21 20:49:48,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:49:48,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:49:48,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 146 transitions. [2024-06-21 20:49:48,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3802083333333333 [2024-06-21 20:49:48,943 INFO L175 Difference]: Start difference. First operand has 444 places, 329 transitions, 3334 flow. Second operand 12 states and 146 transitions. [2024-06-21 20:49:48,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 349 transitions, 4400 flow [2024-06-21 20:49:50,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 349 transitions, 4186 flow, removed 12 selfloop flow, removed 11 redundant places. [2024-06-21 20:49:50,483 INFO L231 Difference]: Finished difference. Result has 436 places, 331 transitions, 3386 flow [2024-06-21 20:49:50,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3130, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3386, PETRI_PLACES=436, PETRI_TRANSITIONS=331} [2024-06-21 20:49:50,484 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 405 predicate places. [2024-06-21 20:49:50,484 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 331 transitions, 3386 flow [2024-06-21 20:49:50,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:50,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:50,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:50,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270 [2024-06-21 20:49:50,484 INFO L420 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:49:50,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:50,484 INFO L85 PathProgramCache]: Analyzing trace with hash 571832044, now seen corresponding path program 16 times [2024-06-21 20:49:50,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:50,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655655965] [2024-06-21 20:49:50,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:50,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:50,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:51,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:51,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:51,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655655965] [2024-06-21 20:49:51,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655655965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:51,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:51,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:49:51,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901775028] [2024-06-21 20:49:51,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:51,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:49:51,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:51,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:49:51,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:49:51,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:49:51,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 331 transitions, 3386 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:51,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:51,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:49:51,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:52,555 INFO L124 PetriNetUnfolderBase]: 937/1827 cut-off events. [2024-06-21 20:49:52,555 INFO L125 PetriNetUnfolderBase]: For 620755/620755 co-relation queries the response was YES. [2024-06-21 20:49:52,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16825 conditions, 1827 events. 937/1827 cut-off events. For 620755/620755 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 11403 event pairs, 195 based on Foata normal form. 2/1828 useless extension candidates. Maximal degree in co-relation 16655. Up to 1078 conditions per place. [2024-06-21 20:49:52,576 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 249 selfloop transitions, 107 changer transitions 0/358 dead transitions. [2024-06-21 20:49:52,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 358 transitions, 4568 flow [2024-06-21 20:49:52,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:49:52,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:49:52,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 164 transitions. [2024-06-21 20:49:52,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3942307692307692 [2024-06-21 20:49:52,577 INFO L175 Difference]: Start difference. First operand has 436 places, 331 transitions, 3386 flow. Second operand 13 states and 164 transitions. [2024-06-21 20:49:52,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 358 transitions, 4568 flow [2024-06-21 20:49:54,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 358 transitions, 4404 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-21 20:49:54,449 INFO L231 Difference]: Finished difference. Result has 441 places, 333 transitions, 3478 flow [2024-06-21 20:49:54,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3226, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3478, PETRI_PLACES=441, PETRI_TRANSITIONS=333} [2024-06-21 20:49:54,449 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 410 predicate places. [2024-06-21 20:49:54,449 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 333 transitions, 3478 flow [2024-06-21 20:49:54,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:54,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:54,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:54,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271 [2024-06-21 20:49:54,450 INFO L420 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:49:54,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:54,450 INFO L85 PathProgramCache]: Analyzing trace with hash 392307186, now seen corresponding path program 17 times [2024-06-21 20:49:54,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:54,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639336568] [2024-06-21 20:49:54,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:54,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:54,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:55,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:55,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:55,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639336568] [2024-06-21 20:49:55,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639336568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:55,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:55,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:49:55,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449634511] [2024-06-21 20:49:55,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:55,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:49:55,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:55,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:49:55,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:49:55,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:49:55,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 333 transitions, 3478 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:55,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:55,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:49:55,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:49:56,298 INFO L124 PetriNetUnfolderBase]: 941/1835 cut-off events. [2024-06-21 20:49:56,298 INFO L125 PetriNetUnfolderBase]: For 629364/629364 co-relation queries the response was YES. [2024-06-21 20:49:56,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17047 conditions, 1835 events. 941/1835 cut-off events. For 629364/629364 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 11465 event pairs, 209 based on Foata normal form. 2/1836 useless extension candidates. Maximal degree in co-relation 16875. Up to 1315 conditions per place. [2024-06-21 20:49:56,323 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 254 selfloop transitions, 96 changer transitions 0/352 dead transitions. [2024-06-21 20:49:56,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 352 transitions, 4246 flow [2024-06-21 20:49:56,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:49:56,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:49:56,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 148 transitions. [2024-06-21 20:49:56,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3854166666666667 [2024-06-21 20:49:56,324 INFO L175 Difference]: Start difference. First operand has 441 places, 333 transitions, 3478 flow. Second operand 12 states and 148 transitions. [2024-06-21 20:49:56,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 352 transitions, 4246 flow [2024-06-21 20:49:58,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 352 transitions, 4086 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-21 20:49:58,520 INFO L231 Difference]: Finished difference. Result has 444 places, 334 transitions, 3535 flow [2024-06-21 20:49:58,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3322, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3535, PETRI_PLACES=444, PETRI_TRANSITIONS=334} [2024-06-21 20:49:58,521 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 413 predicate places. [2024-06-21 20:49:58,521 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 334 transitions, 3535 flow [2024-06-21 20:49:58,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:58,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:49:58,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:49:58,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272 [2024-06-21 20:49:58,521 INFO L420 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:49:58,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:49:58,522 INFO L85 PathProgramCache]: Analyzing trace with hash 392069602, now seen corresponding path program 31 times [2024-06-21 20:49:58,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:49:58,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158356773] [2024-06-21 20:49:58,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:49:58,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:49:58,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:49:59,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:49:59,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:49:59,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158356773] [2024-06-21 20:49:59,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158356773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:49:59,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:49:59,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:49:59,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316375424] [2024-06-21 20:49:59,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:49:59,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:49:59,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:49:59,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:49:59,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:49:59,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:49:59,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 334 transitions, 3535 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:49:59,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:49:59,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:49:59,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:00,577 INFO L124 PetriNetUnfolderBase]: 936/1832 cut-off events. [2024-06-21 20:50:00,577 INFO L125 PetriNetUnfolderBase]: For 675967/675967 co-relation queries the response was YES. [2024-06-21 20:50:00,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15721 conditions, 1832 events. 936/1832 cut-off events. For 675967/675967 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 11473 event pairs, 198 based on Foata normal form. 16/1847 useless extension candidates. Maximal degree in co-relation 15547. Up to 1224 conditions per place. [2024-06-21 20:50:00,602 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 246 selfloop transitions, 89 changer transitions 21/358 dead transitions. [2024-06-21 20:50:00,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 358 transitions, 4393 flow [2024-06-21 20:50:00,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:50:00,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:50:00,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 162 transitions. [2024-06-21 20:50:00,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3894230769230769 [2024-06-21 20:50:00,603 INFO L175 Difference]: Start difference. First operand has 444 places, 334 transitions, 3535 flow. Second operand 13 states and 162 transitions. [2024-06-21 20:50:00,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 358 transitions, 4393 flow [2024-06-21 20:50:02,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 358 transitions, 4196 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 20:50:02,244 INFO L231 Difference]: Finished difference. Result has 447 places, 323 transitions, 3409 flow [2024-06-21 20:50:02,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3338, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3409, PETRI_PLACES=447, PETRI_TRANSITIONS=323} [2024-06-21 20:50:02,244 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 416 predicate places. [2024-06-21 20:50:02,244 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 323 transitions, 3409 flow [2024-06-21 20:50:02,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:02,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:02,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:02,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273 [2024-06-21 20:50:02,245 INFO L420 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:50:02,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:02,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1412301270, now seen corresponding path program 32 times [2024-06-21 20:50:02,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:02,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494803099] [2024-06-21 20:50:02,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:02,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:02,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:03,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:03,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:03,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494803099] [2024-06-21 20:50:03,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494803099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:03,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:03,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:50:03,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766951262] [2024-06-21 20:50:03,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:03,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:50:03,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:03,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:50:03,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:50:03,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:50:03,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 323 transitions, 3409 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:03,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:03,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:50:03,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:04,148 INFO L124 PetriNetUnfolderBase]: 863/1697 cut-off events. [2024-06-21 20:50:04,148 INFO L125 PetriNetUnfolderBase]: For 517364/517364 co-relation queries the response was YES. [2024-06-21 20:50:04,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13490 conditions, 1697 events. 863/1697 cut-off events. For 517364/517364 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 10515 event pairs, 167 based on Foata normal form. 10/1706 useless extension candidates. Maximal degree in co-relation 13315. Up to 1100 conditions per place. [2024-06-21 20:50:04,171 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 224 selfloop transitions, 100 changer transitions 19/345 dead transitions. [2024-06-21 20:50:04,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 345 transitions, 4233 flow [2024-06-21 20:50:04,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:50:04,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:50:04,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 156 transitions. [2024-06-21 20:50:04,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 20:50:04,172 INFO L175 Difference]: Start difference. First operand has 447 places, 323 transitions, 3409 flow. Second operand 13 states and 156 transitions. [2024-06-21 20:50:04,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 345 transitions, 4233 flow [2024-06-21 20:50:06,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 345 transitions, 4037 flow, removed 9 selfloop flow, removed 13 redundant places. [2024-06-21 20:50:06,045 INFO L231 Difference]: Finished difference. Result has 440 places, 314 transitions, 3315 flow [2024-06-21 20:50:06,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3217, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3315, PETRI_PLACES=440, PETRI_TRANSITIONS=314} [2024-06-21 20:50:06,045 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 409 predicate places. [2024-06-21 20:50:06,046 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 314 transitions, 3315 flow [2024-06-21 20:50:06,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:06,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:06,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:06,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274 [2024-06-21 20:50:06,046 INFO L420 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:50:06,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:06,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1175937616, now seen corresponding path program 18 times [2024-06-21 20:50:06,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:06,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312055938] [2024-06-21 20:50:06,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:06,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:06,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:07,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:07,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:07,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312055938] [2024-06-21 20:50:07,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312055938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:07,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:07,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:50:07,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725635530] [2024-06-21 20:50:07,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:07,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:50:07,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:07,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:50:07,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:50:07,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:50:07,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 314 transitions, 3315 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:07,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:07,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:50:07,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:08,041 INFO L124 PetriNetUnfolderBase]: 836/1640 cut-off events. [2024-06-21 20:50:08,041 INFO L125 PetriNetUnfolderBase]: For 415172/415172 co-relation queries the response was YES. [2024-06-21 20:50:08,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13025 conditions, 1640 events. 836/1640 cut-off events. For 415172/415172 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 10074 event pairs, 161 based on Foata normal form. 2/1641 useless extension candidates. Maximal degree in co-relation 12853. Up to 1140 conditions per place. [2024-06-21 20:50:08,066 INFO L140 encePairwiseOnDemand]: 20/32 looper letters, 240 selfloop transitions, 91 changer transitions 0/333 dead transitions. [2024-06-21 20:50:08,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 333 transitions, 4043 flow [2024-06-21 20:50:08,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:50:08,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:50:08,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 143 transitions. [2024-06-21 20:50:08,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3723958333333333 [2024-06-21 20:50:08,067 INFO L175 Difference]: Start difference. First operand has 440 places, 314 transitions, 3315 flow. Second operand 12 states and 143 transitions. [2024-06-21 20:50:08,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 333 transitions, 4043 flow [2024-06-21 20:50:09,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 333 transitions, 3777 flow, removed 8 selfloop flow, removed 16 redundant places. [2024-06-21 20:50:09,471 INFO L231 Difference]: Finished difference. Result has 428 places, 315 transitions, 3255 flow [2024-06-21 20:50:09,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3049, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3255, PETRI_PLACES=428, PETRI_TRANSITIONS=315} [2024-06-21 20:50:09,471 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 397 predicate places. [2024-06-21 20:50:09,471 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 315 transitions, 3255 flow [2024-06-21 20:50:09,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:09,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:09,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:09,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275 [2024-06-21 20:50:09,472 INFO L420 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:50:09,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:09,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1126361274, now seen corresponding path program 19 times [2024-06-21 20:50:09,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:09,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255557890] [2024-06-21 20:50:09,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:09,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:09,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:10,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:10,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:10,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255557890] [2024-06-21 20:50:10,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255557890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:10,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:10,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-06-21 20:50:10,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598296782] [2024-06-21 20:50:10,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:10,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-06-21 20:50:10,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:10,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-06-21 20:50:10,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-06-21 20:50:10,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 32 [2024-06-21 20:50:10,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 315 transitions, 3255 flow. Second operand has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:10,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:10,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 32 [2024-06-21 20:50:10,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:11,346 INFO L124 PetriNetUnfolderBase]: 840/1648 cut-off events. [2024-06-21 20:50:11,346 INFO L125 PetriNetUnfolderBase]: For 399108/399108 co-relation queries the response was YES. [2024-06-21 20:50:11,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12818 conditions, 1648 events. 840/1648 cut-off events. For 399108/399108 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 10148 event pairs, 166 based on Foata normal form. 2/1649 useless extension candidates. Maximal degree in co-relation 12649. Up to 1115 conditions per place. [2024-06-21 20:50:11,367 INFO L140 encePairwiseOnDemand]: 19/32 looper letters, 237 selfloop transitions, 95 changer transitions 0/334 dead transitions. [2024-06-21 20:50:11,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 334 transitions, 3981 flow [2024-06-21 20:50:11,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:50:11,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:50:11,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 147 transitions. [2024-06-21 20:50:11,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3828125 [2024-06-21 20:50:11,368 INFO L175 Difference]: Start difference. First operand has 428 places, 315 transitions, 3255 flow. Second operand 12 states and 147 transitions. [2024-06-21 20:50:11,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 334 transitions, 3981 flow [2024-06-21 20:50:13,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 334 transitions, 3787 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-21 20:50:13,054 INFO L231 Difference]: Finished difference. Result has 430 places, 316 transitions, 3271 flow [2024-06-21 20:50:13,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=3061, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3271, PETRI_PLACES=430, PETRI_TRANSITIONS=316} [2024-06-21 20:50:13,054 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 399 predicate places. [2024-06-21 20:50:13,055 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 316 transitions, 3271 flow [2024-06-21 20:50:13,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.214285714285714) internal successors, (101), 14 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:13,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:13,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:13,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276 [2024-06-21 20:50:13,055 INFO L420 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 20:50:13,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:13,055 INFO L85 PathProgramCache]: Analyzing trace with hash -763701964, now seen corresponding path program 33 times [2024-06-21 20:50:13,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:13,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923272848] [2024-06-21 20:50:13,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:13,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:13,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15