./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix019_power.oepc_pso.oepc_rmo.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/protection/mix019_power.oepc_pso.oepc_rmo.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/mix019_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/mix019_power.oepc_pso.oepc_rmo.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 16:31:17,302 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 16:31:17,363 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 16:31:17,370 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 16:31:17,370 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 16:31:17,393 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 16:31:17,394 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 16:31:17,395 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 16:31:17,395 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 16:31:17,398 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 16:31:17,399 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 16:31:17,399 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 16:31:17,400 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 16:31:17,401 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 16:31:17,401 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 16:31:17,401 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 16:31:17,401 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 16:31:17,402 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 16:31:17,402 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 16:31:17,402 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 16:31:17,402 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 16:31:17,403 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 16:31:17,403 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 16:31:17,403 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 16:31:17,403 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 16:31:17,403 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 16:31:17,404 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 16:31:17,404 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 16:31:17,404 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 16:31:17,405 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 16:31:17,405 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 16:31:17,406 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 16:31:17,406 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:31:17,406 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 16:31:17,406 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 16:31:17,406 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 16:31:17,406 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 16:31:17,407 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 16:31:17,407 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 16:31:17,407 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 16:31:17,407 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 16:31:17,407 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 16:31:17,408 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 16:31:17,408 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 16:31:17,608 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 16:31:17,628 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 16:31:17,631 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 16:31:17,632 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 16:31:17,633 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 16:31:17,634 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix019_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-21 16:31:17,834 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 16:31:17,835 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 16:31:17,836 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix019_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 16:31:18,864 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 16:31:19,105 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 16:31:19,108 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix019_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 16:31:19,124 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19713da35/35f977211eaa40438b1fa879251b6c9c/FLAG2bea2444e [2024-06-21 16:31:19,170 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19713da35/35f977211eaa40438b1fa879251b6c9c [2024-06-21 16:31:19,171 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 16:31:19,173 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 16:31:19,173 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 16:31:19,174 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 16:31:19,177 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 16:31:19,178 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:31:17" (1/2) ... [2024-06-21 16:31:19,178 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64cc4795 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:31:19, skipping insertion in model container [2024-06-21 16:31:19,178 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:31:17" (1/2) ... [2024-06-21 16:31:19,179 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@23486041 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:31:19, skipping insertion in model container [2024-06-21 16:31:19,179 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:31:19" (2/2) ... [2024-06-21 16:31:19,180 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64cc4795 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:31:19, skipping insertion in model container [2024-06-21 16:31:19,180 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:31:19" (2/2) ... [2024-06-21 16:31:19,180 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 16:31:19,258 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 16:31:19,259 INFO L97 edCorrectnessWitness]: Location invariant before [L843-L843] ((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1)) [2024-06-21 16:31:19,259 INFO L97 edCorrectnessWitness]: Location invariant before [L844-L844] ((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1)) [2024-06-21 16:31:19,260 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] ((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1)) [2024-06-21 16:31:19,260 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 16:31:19,260 INFO L106 edCorrectnessWitness]: ghost_update [L839-L839] multithreaded = 1; [2024-06-21 16:31:19,298 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 16:31:19,590 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:31:19,598 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 16:31:19,681 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:31:19,706 INFO L206 MainTranslator]: Completed translation [2024-06-21 16:31:19,707 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:31:19 WrapperNode [2024-06-21 16:31:19,707 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 16:31:19,708 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 16:31:19,708 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 16:31:19,708 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 16:31:19,713 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:31:19" (1/1) ... [2024-06-21 16:31:19,722 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:31:19" (1/1) ... [2024-06-21 16:31:19,757 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 126 [2024-06-21 16:31:19,757 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 16:31:19,758 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 16:31:19,758 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 16:31:19,758 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 16:31:19,766 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:31:19" (1/1) ... [2024-06-21 16:31:19,767 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:31:19" (1/1) ... [2024-06-21 16:31:19,771 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:31:19" (1/1) ... [2024-06-21 16:31:19,790 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 16:31:19,791 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:31:19" (1/1) ... [2024-06-21 16:31:19,791 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:31:19" (1/1) ... [2024-06-21 16:31:19,811 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:31:19" (1/1) ... [2024-06-21 16:31:19,813 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:31:19" (1/1) ... [2024-06-21 16:31:19,829 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:31:19" (1/1) ... [2024-06-21 16:31:19,830 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:31:19" (1/1) ... [2024-06-21 16:31:19,833 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 16:31:19,833 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 16:31:19,833 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 16:31:19,834 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 16:31:19,834 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:31:19" (1/1) ... [2024-06-21 16:31:19,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:31:19,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 16:31:19,873 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 16:31:19,894 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 16:31:19,933 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 16:31:19,934 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 16:31:19,934 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 16:31:19,934 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 16:31:19,935 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 16:31:19,935 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 16:31:19,935 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 16:31:19,935 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 16:31:19,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 16:31:19,935 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 16:31:19,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 16:31:19,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 16:31:19,937 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 16:31:20,075 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 16:31:20,078 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 16:31:20,341 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 16:31:20,341 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 16:31:20,479 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 16:31:20,479 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 16:31:20,480 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:31:20 BoogieIcfgContainer [2024-06-21 16:31:20,480 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 16:31:20,481 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 16:31:20,481 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 16:31:20,484 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 16:31:20,484 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:31:17" (1/4) ... [2024-06-21 16:31:20,484 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70e0c275 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:31:20, skipping insertion in model container [2024-06-21 16:31:20,484 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 04:31:19" (2/4) ... [2024-06-21 16:31:20,485 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70e0c275 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 04:31:20, skipping insertion in model container [2024-06-21 16:31:20,485 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:31:19" (3/4) ... [2024-06-21 16:31:20,485 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70e0c275 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 04:31:20, skipping insertion in model container [2024-06-21 16:31:20,485 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:31:20" (4/4) ... [2024-06-21 16:31:20,486 INFO L112 eAbstractionObserver]: Analyzing ICFG mix019_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 16:31:20,498 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 16:31:20,498 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 16:31:20,498 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 16:31:20,529 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 16:31:20,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-21 16:31:20,569 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-21 16:31:20,570 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:31:20,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 16:31:20,571 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-21 16:31:20,573 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-21 16:31:20,579 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 16:31:20,584 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;@3df1683a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 16:31:20,584 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 16:31:20,587 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 16:31:20,587 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-21 16:31:20,587 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:31:20,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:31:20,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 16:31:20,588 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:31:20,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:31:20,620 INFO L85 PathProgramCache]: Analyzing trace with hash 373697404, now seen corresponding path program 1 times [2024-06-21 16:31:20,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:31:20,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205567697] [2024-06-21 16:31:20,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:31:20,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:31:20,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:31:21,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:31:21,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:31:21,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205567697] [2024-06-21 16:31:21,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205567697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:31:21,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:31:21,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 16:31:21,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090691634] [2024-06-21 16:31:21,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:31:21,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 16:31:21,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:31:21,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 16:31:21,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 16:31:21,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-21 16:31:21,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:21,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:31:21,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-21 16:31:21,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:31:21,732 INFO L124 PetriNetUnfolderBase]: 1363/2122 cut-off events. [2024-06-21 16:31:21,732 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-06-21 16:31:21,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4246 conditions, 2122 events. 1363/2122 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10298 event pairs, 964 based on Foata normal form. 1/2071 useless extension candidates. Maximal degree in co-relation 4234. Up to 2037 conditions per place. [2024-06-21 16:31:21,745 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 32 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-21 16:31:21,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 171 flow [2024-06-21 16:31:21,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 16:31:21,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 16:31:21,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2024-06-21 16:31:21,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-21 16:31:21,754 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 75 transitions. [2024-06-21 16:31:21,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 171 flow [2024-06-21 16:31:21,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 16:31:21,758 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-21 16:31:21,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-21 16:31:21,761 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-21 16:31:21,761 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-21 16:31:21,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:21,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:31:21,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:31:21,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 16:31:21,762 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:31:21,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:31:21,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1653924427, now seen corresponding path program 1 times [2024-06-21 16:31:21,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:31:21,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713691171] [2024-06-21 16:31:21,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:31:21,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:31:21,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:31:22,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:31:22,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:31:22,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713691171] [2024-06-21 16:31:22,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713691171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:31:22,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:31:22,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 16:31:22,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853711874] [2024-06-21 16:31:22,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:31:22,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 16:31:22,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:31:22,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 16:31:22,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 16:31:22,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-21 16:31:22,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:22,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:31:22,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-21 16:31:22,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:31:22,523 INFO L124 PetriNetUnfolderBase]: 1357/2118 cut-off events. [2024-06-21 16:31:22,524 INFO L125 PetriNetUnfolderBase]: For 393/393 co-relation queries the response was YES. [2024-06-21 16:31:22,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4785 conditions, 2118 events. 1357/2118 cut-off events. For 393/393 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10348 event pairs, 840 based on Foata normal form. 3/2108 useless extension candidates. Maximal degree in co-relation 4773. Up to 2013 conditions per place. [2024-06-21 16:31:22,534 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 39 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2024-06-21 16:31:22,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 238 flow [2024-06-21 16:31:22,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 16:31:22,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 16:31:22,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2024-06-21 16:31:22,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-21 16:31:22,536 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 97 transitions. [2024-06-21 16:31:22,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 238 flow [2024-06-21 16:31:22,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 16:31:22,538 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-21 16:31:22,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-21 16:31:22,539 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-21 16:31:22,539 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-21 16:31:22,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:22,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:31:22,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:31:22,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 16:31:22,540 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:31:22,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:31:22,541 INFO L85 PathProgramCache]: Analyzing trace with hash 267951523, now seen corresponding path program 1 times [2024-06-21 16:31:22,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:31:22,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857251997] [2024-06-21 16:31:22,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:31:22,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:31:22,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:31:23,033 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 16:31:23,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:31:23,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857251997] [2024-06-21 16:31:23,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857251997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:31:23,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:31:23,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 16:31:23,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227943038] [2024-06-21 16:31:23,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:31:23,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 16:31:23,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:31:23,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 16:31:23,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 16:31:23,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-21 16:31:23,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 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 16:31:23,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:31:23,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-21 16:31:23,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:31:23,342 INFO L124 PetriNetUnfolderBase]: 1411/2217 cut-off events. [2024-06-21 16:31:23,342 INFO L125 PetriNetUnfolderBase]: For 1163/1163 co-relation queries the response was YES. [2024-06-21 16:31:23,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5545 conditions, 2217 events. 1411/2217 cut-off events. For 1163/1163 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10878 event pairs, 629 based on Foata normal form. 7/2217 useless extension candidates. Maximal degree in co-relation 5531. Up to 1982 conditions per place. [2024-06-21 16:31:23,352 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 54 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2024-06-21 16:31:23,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 76 transitions, 400 flow [2024-06-21 16:31:23,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:31:23,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:31:23,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-21 16:31:23,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292682926829268 [2024-06-21 16:31:23,354 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 5 states and 129 transitions. [2024-06-21 16:31:23,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 76 transitions, 400 flow [2024-06-21 16:31:23,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 76 transitions, 386 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 16:31:23,356 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 237 flow [2024-06-21 16:31:23,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2024-06-21 16:31:23,357 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-21 16:31:23,357 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 237 flow [2024-06-21 16:31:23,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 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 16:31:23,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:31:23,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:31:23,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 16:31:23,358 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:31:23,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:31:23,358 INFO L85 PathProgramCache]: Analyzing trace with hash -366553030, now seen corresponding path program 1 times [2024-06-21 16:31:23,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:31:23,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621323067] [2024-06-21 16:31:23,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:31:23,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:31:23,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:31:23,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:31:23,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:31:23,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621323067] [2024-06-21 16:31:23,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621323067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:31:23,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:31:23,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:31:23,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153682901] [2024-06-21 16:31:23,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:31:23,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:31:23,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:31:23,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:31:23,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:31:24,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-21 16:31:24,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:24,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:31:24,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-21 16:31:24,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:31:24,384 INFO L124 PetriNetUnfolderBase]: 1433/2262 cut-off events. [2024-06-21 16:31:24,384 INFO L125 PetriNetUnfolderBase]: For 2845/2845 co-relation queries the response was YES. [2024-06-21 16:31:24,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6827 conditions, 2262 events. 1433/2262 cut-off events. For 2845/2845 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 11244 event pairs, 476 based on Foata normal form. 7/2265 useless extension candidates. Maximal degree in co-relation 6810. Up to 1925 conditions per place. [2024-06-21 16:31:24,397 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 65 selfloop transitions, 28 changer transitions 0/99 dead transitions. [2024-06-21 16:31:24,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 99 transitions, 629 flow [2024-06-21 16:31:24,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:31:24,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:31:24,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-21 16:31:24,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-21 16:31:24,399 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 237 flow. Second operand 6 states and 156 transitions. [2024-06-21 16:31:24,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 99 transitions, 629 flow [2024-06-21 16:31:24,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 99 transitions, 621 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-21 16:31:24,403 INFO L231 Difference]: Finished difference. Result has 59 places, 62 transitions, 416 flow [2024-06-21 16:31:24,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=416, PETRI_PLACES=59, PETRI_TRANSITIONS=62} [2024-06-21 16:31:24,403 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 17 predicate places. [2024-06-21 16:31:24,404 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 62 transitions, 416 flow [2024-06-21 16:31:24,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:24,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:31:24,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:31:24,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 16:31:24,404 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:31:24,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:31:24,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1521759228, now seen corresponding path program 1 times [2024-06-21 16:31:24,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:31:24,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743640169] [2024-06-21 16:31:24,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:31:24,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:31:24,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:31:25,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:31:25,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:31:25,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743640169] [2024-06-21 16:31:25,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743640169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:31:25,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:31:25,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:31:25,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383932675] [2024-06-21 16:31:25,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:31:25,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:31:25,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:31:25,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:31:25,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:31:25,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-21 16:31:25,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 62 transitions, 416 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:25,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:31:25,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-21 16:31:25,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:31:25,574 INFO L124 PetriNetUnfolderBase]: 1550/2461 cut-off events. [2024-06-21 16:31:25,574 INFO L125 PetriNetUnfolderBase]: For 5758/5758 co-relation queries the response was YES. [2024-06-21 16:31:25,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8755 conditions, 2461 events. 1550/2461 cut-off events. For 5758/5758 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12534 event pairs, 342 based on Foata normal form. 30/2488 useless extension candidates. Maximal degree in co-relation 8732. Up to 1955 conditions per place. [2024-06-21 16:31:25,591 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 83 selfloop transitions, 22 changer transitions 0/111 dead transitions. [2024-06-21 16:31:25,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 111 transitions, 817 flow [2024-06-21 16:31:25,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:31:25,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:31:25,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 16:31:25,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-21 16:31:25,593 INFO L175 Difference]: Start difference. First operand has 59 places, 62 transitions, 416 flow. Second operand 7 states and 176 transitions. [2024-06-21 16:31:25,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 111 transitions, 817 flow [2024-06-21 16:31:25,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 111 transitions, 793 flow, removed 12 selfloop flow, removed 0 redundant places. [2024-06-21 16:31:25,599 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 493 flow [2024-06-21 16:31:25,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=493, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2024-06-21 16:31:25,600 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 24 predicate places. [2024-06-21 16:31:25,600 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 493 flow [2024-06-21 16:31:25,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:25,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:31:25,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:31:25,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 16:31:25,601 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:31:25,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:31:25,601 INFO L85 PathProgramCache]: Analyzing trace with hash 825546214, now seen corresponding path program 1 times [2024-06-21 16:31:25,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:31:25,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338425324] [2024-06-21 16:31:25,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:31:25,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:31:25,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:31:26,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:31:26,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:31:26,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338425324] [2024-06-21 16:31:26,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338425324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:31:26,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:31:26,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:31:26,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046759262] [2024-06-21 16:31:26,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:31:26,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:31:26,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:31:26,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:31:26,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:31:26,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 16:31:26,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 493 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:26,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:31:26,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 16:31:26,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:31:26,552 INFO L124 PetriNetUnfolderBase]: 1540/2452 cut-off events. [2024-06-21 16:31:26,553 INFO L125 PetriNetUnfolderBase]: For 7059/7059 co-relation queries the response was YES. [2024-06-21 16:31:26,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9202 conditions, 2452 events. 1540/2452 cut-off events. For 7059/7059 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12511 event pairs, 531 based on Foata normal form. 4/2455 useless extension candidates. Maximal degree in co-relation 9174. Up to 2310 conditions per place. [2024-06-21 16:31:26,571 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 62 selfloop transitions, 10 changer transitions 0/77 dead transitions. [2024-06-21 16:31:26,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 77 transitions, 665 flow [2024-06-21 16:31:26,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:31:26,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:31:26,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-06-21 16:31:26,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4682926829268293 [2024-06-21 16:31:26,572 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 493 flow. Second operand 5 states and 96 transitions. [2024-06-21 16:31:26,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 77 transitions, 665 flow [2024-06-21 16:31:26,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 77 transitions, 617 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 16:31:26,579 INFO L231 Difference]: Finished difference. Result has 67 places, 66 transitions, 475 flow [2024-06-21 16:31:26,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=445, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=475, PETRI_PLACES=67, PETRI_TRANSITIONS=66} [2024-06-21 16:31:26,582 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2024-06-21 16:31:26,582 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 66 transitions, 475 flow [2024-06-21 16:31:26,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:26,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:31:26,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:31:26,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 16:31:26,583 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:31:26,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:31:26,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1001015545, now seen corresponding path program 1 times [2024-06-21 16:31:26,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:31:26,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720850428] [2024-06-21 16:31:26,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:31:26,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:31:26,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:31:27,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:31:27,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:31:27,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720850428] [2024-06-21 16:31:27,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720850428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:31:27,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:31:27,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:31:27,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692006212] [2024-06-21 16:31:27,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:31:27,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:31:27,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:31:27,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:31:27,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:31:27,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 16:31:27,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 66 transitions, 475 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 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 16:31:27,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:31:27,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 16:31:27,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:31:27,508 INFO L124 PetriNetUnfolderBase]: 1552/2463 cut-off events. [2024-06-21 16:31:27,509 INFO L125 PetriNetUnfolderBase]: For 7927/7927 co-relation queries the response was YES. [2024-06-21 16:31:27,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9249 conditions, 2463 events. 1552/2463 cut-off events. For 7927/7927 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12557 event pairs, 469 based on Foata normal form. 8/2468 useless extension candidates. Maximal degree in co-relation 9219. Up to 2208 conditions per place. [2024-06-21 16:31:27,526 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 67 selfloop transitions, 19 changer transitions 0/91 dead transitions. [2024-06-21 16:31:27,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 91 transitions, 761 flow [2024-06-21 16:31:27,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:31:27,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:31:27,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-21 16:31:27,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 16:31:27,528 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 475 flow. Second operand 6 states and 123 transitions. [2024-06-21 16:31:27,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 91 transitions, 761 flow [2024-06-21 16:31:27,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 91 transitions, 731 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 16:31:27,540 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 527 flow [2024-06-21 16:31:27,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=445, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=527, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2024-06-21 16:31:27,541 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 27 predicate places. [2024-06-21 16:31:27,542 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 527 flow [2024-06-21 16:31:27,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 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 16:31:27,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:31:27,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:31:27,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 16:31:27,542 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:31:27,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:31:27,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1218991803, now seen corresponding path program 2 times [2024-06-21 16:31:27,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:31:27,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760256267] [2024-06-21 16:31:27,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:31:27,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:31:27,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:31:28,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:31:28,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:31:28,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760256267] [2024-06-21 16:31:28,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760256267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:31:28,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:31:28,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:31:28,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427477673] [2024-06-21 16:31:28,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:31:28,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:31:28,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:31:28,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:31:28,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:31:28,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 16:31:28,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 527 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 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 16:31:28,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:31:28,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 16:31:28,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:31:28,501 INFO L124 PetriNetUnfolderBase]: 1510/2388 cut-off events. [2024-06-21 16:31:28,501 INFO L125 PetriNetUnfolderBase]: For 8890/8890 co-relation queries the response was YES. [2024-06-21 16:31:28,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9203 conditions, 2388 events. 1510/2388 cut-off events. For 8890/8890 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12004 event pairs, 507 based on Foata normal form. 4/2391 useless extension candidates. Maximal degree in co-relation 9173. Up to 2241 conditions per place. [2024-06-21 16:31:28,512 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 69 selfloop transitions, 11 changer transitions 0/85 dead transitions. [2024-06-21 16:31:28,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 85 transitions, 729 flow [2024-06-21 16:31:28,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:31:28,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:31:28,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-21 16:31:28,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45934959349593496 [2024-06-21 16:31:28,514 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 527 flow. Second operand 6 states and 113 transitions. [2024-06-21 16:31:28,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 85 transitions, 729 flow [2024-06-21 16:31:28,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 85 transitions, 700 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 16:31:28,525 INFO L231 Difference]: Finished difference. Result has 72 places, 69 transitions, 528 flow [2024-06-21 16:31:28,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=528, PETRI_PLACES=72, PETRI_TRANSITIONS=69} [2024-06-21 16:31:28,527 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 30 predicate places. [2024-06-21 16:31:28,527 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 69 transitions, 528 flow [2024-06-21 16:31:28,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 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 16:31:28,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:31:28,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:31:28,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 16:31:28,528 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:31:28,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:31:28,529 INFO L85 PathProgramCache]: Analyzing trace with hash -264966119, now seen corresponding path program 1 times [2024-06-21 16:31:28,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:31:28,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683120405] [2024-06-21 16:31:28,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:31:28,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:31:28,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:31:29,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:31:29,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:31:29,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683120405] [2024-06-21 16:31:29,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683120405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:31:29,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:31:29,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:31:29,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339405947] [2024-06-21 16:31:29,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:31:29,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:31:29,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:31:29,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:31:29,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:31:29,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 16:31:29,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 69 transitions, 528 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:29,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:31:29,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 16:31:29,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:31:30,462 INFO L124 PetriNetUnfolderBase]: 1833/2841 cut-off events. [2024-06-21 16:31:30,462 INFO L125 PetriNetUnfolderBase]: For 12290/12290 co-relation queries the response was YES. [2024-06-21 16:31:30,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10950 conditions, 2841 events. 1833/2841 cut-off events. For 12290/12290 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13860 event pairs, 638 based on Foata normal form. 4/2844 useless extension candidates. Maximal degree in co-relation 10919. Up to 2693 conditions per place. [2024-06-21 16:31:30,474 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 75 selfloop transitions, 15 changer transitions 0/94 dead transitions. [2024-06-21 16:31:30,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 94 transitions, 806 flow [2024-06-21 16:31:30,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:31:30,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:31:30,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 16:31:30,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-21 16:31:30,476 INFO L175 Difference]: Start difference. First operand has 72 places, 69 transitions, 528 flow. Second operand 7 states and 124 transitions. [2024-06-21 16:31:30,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 94 transitions, 806 flow [2024-06-21 16:31:30,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 94 transitions, 752 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 16:31:30,485 INFO L231 Difference]: Finished difference. Result has 74 places, 74 transitions, 569 flow [2024-06-21 16:31:30,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=569, PETRI_PLACES=74, PETRI_TRANSITIONS=74} [2024-06-21 16:31:30,487 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2024-06-21 16:31:30,487 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 74 transitions, 569 flow [2024-06-21 16:31:30,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:30,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:31:30,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:31:30,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 16:31:30,488 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:31:30,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:31:30,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1426649731, now seen corresponding path program 1 times [2024-06-21 16:31:30,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:31:30,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161411686] [2024-06-21 16:31:30,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:31:30,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:31:30,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:31:30,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:31:30,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:31:30,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161411686] [2024-06-21 16:31:30,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161411686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:31:30,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:31:30,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:31:30,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979056291] [2024-06-21 16:31:30,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:31:30,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:31:30,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:31:30,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:31:30,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:31:30,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:31:30,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 74 transitions, 569 flow. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:30,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:31:30,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:31:30,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:31:31,475 INFO L124 PetriNetUnfolderBase]: 2082/3106 cut-off events. [2024-06-21 16:31:31,476 INFO L125 PetriNetUnfolderBase]: For 16145/16145 co-relation queries the response was YES. [2024-06-21 16:31:31,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12666 conditions, 3106 events. 2082/3106 cut-off events. For 16145/16145 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 14458 event pairs, 763 based on Foata normal form. 1/3106 useless extension candidates. Maximal degree in co-relation 12634. Up to 3091 conditions per place. [2024-06-21 16:31:31,491 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 74 selfloop transitions, 8 changer transitions 0/85 dead transitions. [2024-06-21 16:31:31,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 85 transitions, 777 flow [2024-06-21 16:31:31,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:31:31,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:31:31,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2024-06-21 16:31:31,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40487804878048783 [2024-06-21 16:31:31,492 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 569 flow. Second operand 5 states and 83 transitions. [2024-06-21 16:31:31,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 85 transitions, 777 flow [2024-06-21 16:31:31,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 85 transitions, 736 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 16:31:31,510 INFO L231 Difference]: Finished difference. Result has 75 places, 77 transitions, 580 flow [2024-06-21 16:31:31,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=580, PETRI_PLACES=75, PETRI_TRANSITIONS=77} [2024-06-21 16:31:31,511 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-06-21 16:31:31,511 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 77 transitions, 580 flow [2024-06-21 16:31:31,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:31,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:31:31,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:31:31,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 16:31:31,513 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:31:31,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:31:31,514 INFO L85 PathProgramCache]: Analyzing trace with hash 92974566, now seen corresponding path program 1 times [2024-06-21 16:31:31,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:31:31,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762989365] [2024-06-21 16:31:31,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:31:31,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:31:31,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:31:32,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:31:32,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:31:32,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762989365] [2024-06-21 16:31:32,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762989365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:31:32,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:31:32,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:31:32,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933089493] [2024-06-21 16:31:32,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:31:32,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:31:32,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:31:32,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:31:32,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:31:32,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 16:31:32,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 77 transitions, 580 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:32,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:31:32,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 16:31:32,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:31:32,749 INFO L124 PetriNetUnfolderBase]: 1788/2771 cut-off events. [2024-06-21 16:31:32,749 INFO L125 PetriNetUnfolderBase]: For 18317/18319 co-relation queries the response was YES. [2024-06-21 16:31:32,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11783 conditions, 2771 events. 1788/2771 cut-off events. For 18317/18319 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13977 event pairs, 553 based on Foata normal form. 4/2764 useless extension candidates. Maximal degree in co-relation 11750. Up to 2432 conditions per place. [2024-06-21 16:31:32,766 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 78 selfloop transitions, 28 changer transitions 0/113 dead transitions. [2024-06-21 16:31:32,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 113 transitions, 906 flow [2024-06-21 16:31:32,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:31:32,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:31:32,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-21 16:31:32,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49085365853658536 [2024-06-21 16:31:32,767 INFO L175 Difference]: Start difference. First operand has 75 places, 77 transitions, 580 flow. Second operand 8 states and 161 transitions. [2024-06-21 16:31:32,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 113 transitions, 906 flow [2024-06-21 16:31:32,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 113 transitions, 876 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 16:31:32,782 INFO L231 Difference]: Finished difference. Result has 80 places, 80 transitions, 645 flow [2024-06-21 16:31:32,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=645, PETRI_PLACES=80, PETRI_TRANSITIONS=80} [2024-06-21 16:31:32,782 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 38 predicate places. [2024-06-21 16:31:32,782 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 80 transitions, 645 flow [2024-06-21 16:31:32,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:32,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:31:32,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:31:32,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 16:31:32,783 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:31:32,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:31:32,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1372063240, now seen corresponding path program 1 times [2024-06-21 16:31:32,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:31:32,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190077369] [2024-06-21 16:31:32,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:31:32,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:31:32,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:31:33,564 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 16:31:33,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:31:33,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190077369] [2024-06-21 16:31:33,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190077369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:31:33,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:31:33,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:31:33,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461709783] [2024-06-21 16:31:33,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:31:33,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:31:33,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:31:33,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:31:33,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:31:33,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 16:31:33,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 80 transitions, 645 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:33,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:31:33,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 16:31:33,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:31:34,213 INFO L124 PetriNetUnfolderBase]: 1930/2956 cut-off events. [2024-06-21 16:31:34,214 INFO L125 PetriNetUnfolderBase]: For 22313/22313 co-relation queries the response was YES. [2024-06-21 16:31:34,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13328 conditions, 2956 events. 1930/2956 cut-off events. For 22313/22313 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14238 event pairs, 670 based on Foata normal form. 2/2957 useless extension candidates. Maximal degree in co-relation 13294. Up to 2783 conditions per place. [2024-06-21 16:31:34,228 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 79 selfloop transitions, 19 changer transitions 0/103 dead transitions. [2024-06-21 16:31:34,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 103 transitions, 926 flow [2024-06-21 16:31:34,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:31:34,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:31:34,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 16:31:34,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355400696864111 [2024-06-21 16:31:34,229 INFO L175 Difference]: Start difference. First operand has 80 places, 80 transitions, 645 flow. Second operand 7 states and 125 transitions. [2024-06-21 16:31:34,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 103 transitions, 926 flow [2024-06-21 16:31:34,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 103 transitions, 851 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 16:31:34,243 INFO L231 Difference]: Finished difference. Result has 81 places, 83 transitions, 659 flow [2024-06-21 16:31:34,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=574, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=659, PETRI_PLACES=81, PETRI_TRANSITIONS=83} [2024-06-21 16:31:34,244 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-21 16:31:34,244 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 83 transitions, 659 flow [2024-06-21 16:31:34,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:34,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:31:34,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:31:34,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 16:31:34,245 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:31:34,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:31:34,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1291660321, now seen corresponding path program 1 times [2024-06-21 16:31:34,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:31:34,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759355458] [2024-06-21 16:31:34,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:31:34,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:31:34,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:31:34,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:31:34,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:31:34,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759355458] [2024-06-21 16:31:34,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759355458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:31:34,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:31:34,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:31:34,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114371422] [2024-06-21 16:31:34,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:31:34,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:31:34,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:31:34,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:31:34,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:31:34,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:31:34,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 83 transitions, 659 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:34,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:31:34,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:31:34,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:31:35,259 INFO L124 PetriNetUnfolderBase]: 2075/3098 cut-off events. [2024-06-21 16:31:35,259 INFO L125 PetriNetUnfolderBase]: For 24533/24533 co-relation queries the response was YES. [2024-06-21 16:31:35,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13929 conditions, 3098 events. 2075/3098 cut-off events. For 24533/24533 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14318 event pairs, 731 based on Foata normal form. 3/3100 useless extension candidates. Maximal degree in co-relation 13894. Up to 3074 conditions per place. [2024-06-21 16:31:35,276 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 83 selfloop transitions, 11 changer transitions 0/97 dead transitions. [2024-06-21 16:31:35,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 97 transitions, 901 flow [2024-06-21 16:31:35,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:31:35,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:31:35,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-21 16:31:35,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943089430894309 [2024-06-21 16:31:35,278 INFO L175 Difference]: Start difference. First operand has 81 places, 83 transitions, 659 flow. Second operand 6 states and 97 transitions. [2024-06-21 16:31:35,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 97 transitions, 901 flow [2024-06-21 16:31:35,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 97 transitions, 847 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 16:31:35,298 INFO L231 Difference]: Finished difference. Result has 81 places, 86 transitions, 667 flow [2024-06-21 16:31:35,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=605, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=667, PETRI_PLACES=81, PETRI_TRANSITIONS=86} [2024-06-21 16:31:35,299 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-21 16:31:35,299 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 86 transitions, 667 flow [2024-06-21 16:31:35,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:35,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:31:35,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:31:35,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 16:31:35,300 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:31:35,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:31:35,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1412814630, now seen corresponding path program 1 times [2024-06-21 16:31:35,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:31:35,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264200894] [2024-06-21 16:31:35,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:31:35,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:31:35,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:31:36,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:31:36,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:31:36,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264200894] [2024-06-21 16:31:36,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264200894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:31:36,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:31:36,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:31:36,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275151508] [2024-06-21 16:31:36,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:31:36,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:31:36,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:31:36,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:31:36,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:31:36,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 16:31:36,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 86 transitions, 667 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:36,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:31:36,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 16:31:36,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:31:36,782 INFO L124 PetriNetUnfolderBase]: 2064/3204 cut-off events. [2024-06-21 16:31:36,782 INFO L125 PetriNetUnfolderBase]: For 31356/31356 co-relation queries the response was YES. [2024-06-21 16:31:36,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15017 conditions, 3204 events. 2064/3204 cut-off events. For 31356/31356 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 16537 event pairs, 363 based on Foata normal form. 16/3200 useless extension candidates. Maximal degree in co-relation 14981. Up to 2268 conditions per place. [2024-06-21 16:31:36,803 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 95 selfloop transitions, 30 changer transitions 0/132 dead transitions. [2024-06-21 16:31:36,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 132 transitions, 1133 flow [2024-06-21 16:31:36,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:31:36,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:31:36,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-21 16:31:36,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-21 16:31:36,804 INFO L175 Difference]: Start difference. First operand has 81 places, 86 transitions, 667 flow. Second operand 8 states and 168 transitions. [2024-06-21 16:31:36,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 132 transitions, 1133 flow [2024-06-21 16:31:36,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 132 transitions, 1093 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 16:31:36,828 INFO L231 Difference]: Finished difference. Result has 85 places, 88 transitions, 727 flow [2024-06-21 16:31:36,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=627, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=727, PETRI_PLACES=85, PETRI_TRANSITIONS=88} [2024-06-21 16:31:36,828 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 43 predicate places. [2024-06-21 16:31:36,829 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 88 transitions, 727 flow [2024-06-21 16:31:36,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:36,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:31:36,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:31:36,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 16:31:36,829 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:31:36,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:31:36,830 INFO L85 PathProgramCache]: Analyzing trace with hash -8766880, now seen corresponding path program 2 times [2024-06-21 16:31:36,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:31:36,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016075787] [2024-06-21 16:31:36,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:31:36,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:31:36,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:31:37,583 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 16:31:37,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:31:37,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016075787] [2024-06-21 16:31:37,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016075787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:31:37,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:31:37,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:31:37,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833863331] [2024-06-21 16:31:37,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:31:37,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:31:37,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:31:37,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:31:37,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:31:37,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 16:31:37,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 88 transitions, 727 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:37,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:31:37,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 16:31:37,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:31:38,305 INFO L124 PetriNetUnfolderBase]: 2140/3338 cut-off events. [2024-06-21 16:31:38,305 INFO L125 PetriNetUnfolderBase]: For 36025/36025 co-relation queries the response was YES. [2024-06-21 16:31:38,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15979 conditions, 3338 events. 2140/3338 cut-off events. For 36025/36025 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 17587 event pairs, 561 based on Foata normal form. 20/3350 useless extension candidates. Maximal degree in co-relation 15942. Up to 2771 conditions per place. [2024-06-21 16:31:38,324 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 86 selfloop transitions, 42 changer transitions 0/135 dead transitions. [2024-06-21 16:31:38,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 135 transitions, 1193 flow [2024-06-21 16:31:38,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:31:38,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:31:38,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-21 16:31:38,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4905149051490515 [2024-06-21 16:31:38,326 INFO L175 Difference]: Start difference. First operand has 85 places, 88 transitions, 727 flow. Second operand 9 states and 181 transitions. [2024-06-21 16:31:38,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 135 transitions, 1193 flow [2024-06-21 16:31:38,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 135 transitions, 1150 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 16:31:38,354 INFO L231 Difference]: Finished difference. Result has 90 places, 92 transitions, 813 flow [2024-06-21 16:31:38,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=687, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=813, PETRI_PLACES=90, PETRI_TRANSITIONS=92} [2024-06-21 16:31:38,355 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2024-06-21 16:31:38,355 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 92 transitions, 813 flow [2024-06-21 16:31:38,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:38,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:31:38,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:31:38,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 16:31:38,355 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:31:38,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:31:38,356 INFO L85 PathProgramCache]: Analyzing trace with hash -5970370, now seen corresponding path program 3 times [2024-06-21 16:31:38,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:31:38,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466965744] [2024-06-21 16:31:38,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:31:38,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:31:38,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:31:39,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:31:39,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:31:39,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466965744] [2024-06-21 16:31:39,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466965744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:31:39,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:31:39,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:31:39,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075546937] [2024-06-21 16:31:39,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:31:39,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:31:39,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:31:39,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:31:39,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:31:39,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 16:31:39,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 92 transitions, 813 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:39,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:31:39,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 16:31:39,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:31:39,878 INFO L124 PetriNetUnfolderBase]: 2212/3454 cut-off events. [2024-06-21 16:31:39,878 INFO L125 PetriNetUnfolderBase]: For 41490/41490 co-relation queries the response was YES. [2024-06-21 16:31:39,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16831 conditions, 3454 events. 2212/3454 cut-off events. For 41490/41490 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 18332 event pairs, 595 based on Foata normal form. 28/3471 useless extension candidates. Maximal degree in co-relation 16792. Up to 2953 conditions per place. [2024-06-21 16:31:39,897 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 94 selfloop transitions, 28 changer transitions 0/129 dead transitions. [2024-06-21 16:31:39,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 129 transitions, 1189 flow [2024-06-21 16:31:39,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:31:39,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:31:39,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-21 16:31:39,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49085365853658536 [2024-06-21 16:31:39,899 INFO L175 Difference]: Start difference. First operand has 90 places, 92 transitions, 813 flow. Second operand 8 states and 161 transitions. [2024-06-21 16:31:39,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 129 transitions, 1189 flow [2024-06-21 16:31:39,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 129 transitions, 1115 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 16:31:39,933 INFO L231 Difference]: Finished difference. Result has 94 places, 94 transitions, 834 flow [2024-06-21 16:31:39,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=739, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=834, PETRI_PLACES=94, PETRI_TRANSITIONS=94} [2024-06-21 16:31:39,934 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 52 predicate places. [2024-06-21 16:31:39,934 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 94 transitions, 834 flow [2024-06-21 16:31:39,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:39,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:31:39,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:31:39,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 16:31:39,935 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:31:39,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:31:39,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1398204194, now seen corresponding path program 1 times [2024-06-21 16:31:39,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:31:39,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165722947] [2024-06-21 16:31:39,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:31:39,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:31:39,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:31:40,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:31:40,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:31:40,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165722947] [2024-06-21 16:31:40,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165722947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:31:40,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:31:40,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:31:40,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30859543] [2024-06-21 16:31:40,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:31:40,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:31:40,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:31:40,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:31:40,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:31:40,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:31:40,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 94 transitions, 834 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:40,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:31:40,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:31:40,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:31:41,071 INFO L124 PetriNetUnfolderBase]: 2467/3739 cut-off events. [2024-06-21 16:31:41,071 INFO L125 PetriNetUnfolderBase]: For 42595/42595 co-relation queries the response was YES. [2024-06-21 16:31:41,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18362 conditions, 3739 events. 2467/3739 cut-off events. For 42595/42595 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 18537 event pairs, 850 based on Foata normal form. 1/3739 useless extension candidates. Maximal degree in co-relation 18322. Up to 3702 conditions per place. [2024-06-21 16:31:41,094 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 97 selfloop transitions, 16 changer transitions 0/116 dead transitions. [2024-06-21 16:31:41,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 116 transitions, 1188 flow [2024-06-21 16:31:41,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:31:41,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:31:41,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-21 16:31:41,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-21 16:31:41,096 INFO L175 Difference]: Start difference. First operand has 94 places, 94 transitions, 834 flow. Second operand 6 states and 104 transitions. [2024-06-21 16:31:41,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 116 transitions, 1188 flow [2024-06-21 16:31:41,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 116 transitions, 1106 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 16:31:41,136 INFO L231 Difference]: Finished difference. Result has 93 places, 100 transitions, 852 flow [2024-06-21 16:31:41,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=752, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=852, PETRI_PLACES=93, PETRI_TRANSITIONS=100} [2024-06-21 16:31:41,136 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 51 predicate places. [2024-06-21 16:31:41,136 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 100 transitions, 852 flow [2024-06-21 16:31:41,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:41,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:31:41,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:31:41,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 16:31:41,137 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:31:41,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:31:41,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1514565624, now seen corresponding path program 1 times [2024-06-21 16:31:41,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:31:41,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491061844] [2024-06-21 16:31:41,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:31:41,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:31:41,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:31:42,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:31:42,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:31:42,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491061844] [2024-06-21 16:31:42,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491061844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:31:42,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:31:42,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:31:42,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882158273] [2024-06-21 16:31:42,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:31:42,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:31:42,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:31:42,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:31:42,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:31:42,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 16:31:42,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 100 transitions, 852 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:42,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:31:42,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 16:31:42,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:31:42,700 INFO L124 PetriNetUnfolderBase]: 2364/3646 cut-off events. [2024-06-21 16:31:42,700 INFO L125 PetriNetUnfolderBase]: For 47493/47493 co-relation queries the response was YES. [2024-06-21 16:31:42,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18245 conditions, 3646 events. 2364/3646 cut-off events. For 47493/47493 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 18569 event pairs, 801 based on Foata normal form. 4/3649 useless extension candidates. Maximal degree in co-relation 18204. Up to 3471 conditions per place. [2024-06-21 16:31:42,721 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 104 selfloop transitions, 16 changer transitions 0/127 dead transitions. [2024-06-21 16:31:42,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 127 transitions, 1188 flow [2024-06-21 16:31:42,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:31:42,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:31:42,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 16:31:42,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-21 16:31:42,723 INFO L175 Difference]: Start difference. First operand has 93 places, 100 transitions, 852 flow. Second operand 8 states and 140 transitions. [2024-06-21 16:31:42,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 127 transitions, 1188 flow [2024-06-21 16:31:42,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 127 transitions, 1158 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-21 16:31:42,770 INFO L231 Difference]: Finished difference. Result has 99 places, 102 transitions, 897 flow [2024-06-21 16:31:42,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=822, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=897, PETRI_PLACES=99, PETRI_TRANSITIONS=102} [2024-06-21 16:31:42,770 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 57 predicate places. [2024-06-21 16:31:42,770 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 102 transitions, 897 flow [2024-06-21 16:31:42,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:42,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:31:42,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:31:42,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 16:31:42,771 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:31:42,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:31:42,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1505994744, now seen corresponding path program 2 times [2024-06-21 16:31:42,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:31:42,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991463423] [2024-06-21 16:31:42,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:31:42,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:31:42,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:31:43,725 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 16:31:43,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:31:43,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991463423] [2024-06-21 16:31:43,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991463423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:31:43,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:31:43,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:31:43,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371780175] [2024-06-21 16:31:43,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:31:43,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:31:43,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:31:43,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:31:43,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:31:43,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 16:31:43,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 102 transitions, 897 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:43,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:31:43,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 16:31:43,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:31:44,422 INFO L124 PetriNetUnfolderBase]: 2381/3673 cut-off events. [2024-06-21 16:31:44,423 INFO L125 PetriNetUnfolderBase]: For 53036/53036 co-relation queries the response was YES. [2024-06-21 16:31:44,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18872 conditions, 3673 events. 2381/3673 cut-off events. For 53036/53036 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 18742 event pairs, 748 based on Foata normal form. 4/3676 useless extension candidates. Maximal degree in co-relation 18829. Up to 3484 conditions per place. [2024-06-21 16:31:44,446 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 105 selfloop transitions, 17 changer transitions 0/129 dead transitions. [2024-06-21 16:31:44,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 129 transitions, 1233 flow [2024-06-21 16:31:44,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:31:44,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:31:44,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 16:31:44,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-21 16:31:44,448 INFO L175 Difference]: Start difference. First operand has 99 places, 102 transitions, 897 flow. Second operand 8 states and 140 transitions. [2024-06-21 16:31:44,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 129 transitions, 1233 flow [2024-06-21 16:31:44,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 129 transitions, 1174 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 16:31:44,491 INFO L231 Difference]: Finished difference. Result has 101 places, 104 transitions, 913 flow [2024-06-21 16:31:44,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=838, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=913, PETRI_PLACES=101, PETRI_TRANSITIONS=104} [2024-06-21 16:31:44,492 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2024-06-21 16:31:44,492 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 104 transitions, 913 flow [2024-06-21 16:31:44,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:44,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:31:44,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:31:44,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 16:31:44,492 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:31:44,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:31:44,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1506291414, now seen corresponding path program 3 times [2024-06-21 16:31:44,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:31:44,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388296809] [2024-06-21 16:31:44,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:31:44,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:31:44,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:31:45,521 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 16:31:45,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:31:45,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388296809] [2024-06-21 16:31:45,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388296809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:31:45,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:31:45,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:31:45,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677964378] [2024-06-21 16:31:45,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:31:45,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:31:45,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:31:45,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:31:45,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:31:45,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 16:31:45,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 104 transitions, 913 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:45,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:31:45,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 16:31:45,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:31:46,261 INFO L124 PetriNetUnfolderBase]: 2373/3661 cut-off events. [2024-06-21 16:31:46,261 INFO L125 PetriNetUnfolderBase]: For 57659/57659 co-relation queries the response was YES. [2024-06-21 16:31:46,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19109 conditions, 3661 events. 2373/3661 cut-off events. For 57659/57659 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 18673 event pairs, 795 based on Foata normal form. 4/3664 useless extension candidates. Maximal degree in co-relation 19065. Up to 3450 conditions per place. [2024-06-21 16:31:46,287 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 101 selfloop transitions, 23 changer transitions 0/131 dead transitions. [2024-06-21 16:31:46,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 131 transitions, 1259 flow [2024-06-21 16:31:46,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:31:46,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:31:46,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 16:31:46,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-21 16:31:46,289 INFO L175 Difference]: Start difference. First operand has 101 places, 104 transitions, 913 flow. Second operand 8 states and 141 transitions. [2024-06-21 16:31:46,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 131 transitions, 1259 flow [2024-06-21 16:31:46,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 131 transitions, 1202 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 16:31:46,344 INFO L231 Difference]: Finished difference. Result has 103 places, 106 transitions, 950 flow [2024-06-21 16:31:46,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=856, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=950, PETRI_PLACES=103, PETRI_TRANSITIONS=106} [2024-06-21 16:31:46,344 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 61 predicate places. [2024-06-21 16:31:46,344 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 106 transitions, 950 flow [2024-06-21 16:31:46,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:46,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:31:46,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:31:46,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 16:31:46,345 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:31:46,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:31:46,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1465795622, now seen corresponding path program 4 times [2024-06-21 16:31:46,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:31:46,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779661773] [2024-06-21 16:31:46,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:31:46,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:31:46,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:31:47,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:31:47,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:31:47,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779661773] [2024-06-21 16:31:47,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779661773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:31:47,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:31:47,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:31:47,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030498265] [2024-06-21 16:31:47,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:31:47,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:31:47,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:31:47,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:31:47,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:31:47,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 16:31:47,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 106 transitions, 950 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:47,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:31:47,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 16:31:47,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:31:47,872 INFO L124 PetriNetUnfolderBase]: 2365/3649 cut-off events. [2024-06-21 16:31:47,873 INFO L125 PetriNetUnfolderBase]: For 62596/62596 co-relation queries the response was YES. [2024-06-21 16:31:47,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19352 conditions, 3649 events. 2365/3649 cut-off events. For 62596/62596 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 18588 event pairs, 793 based on Foata normal form. 4/3652 useless extension candidates. Maximal degree in co-relation 19307. Up to 3447 conditions per place. [2024-06-21 16:31:47,895 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 109 selfloop transitions, 21 changer transitions 0/137 dead transitions. [2024-06-21 16:31:47,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 137 transitions, 1345 flow [2024-06-21 16:31:47,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:31:47,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:31:47,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 16:31:47,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-21 16:31:47,896 INFO L175 Difference]: Start difference. First operand has 103 places, 106 transitions, 950 flow. Second operand 8 states and 143 transitions. [2024-06-21 16:31:47,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 137 transitions, 1345 flow [2024-06-21 16:31:47,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 137 transitions, 1279 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 16:31:47,956 INFO L231 Difference]: Finished difference. Result has 106 places, 111 transitions, 1014 flow [2024-06-21 16:31:47,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=884, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1014, PETRI_PLACES=106, PETRI_TRANSITIONS=111} [2024-06-21 16:31:47,956 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 64 predicate places. [2024-06-21 16:31:47,957 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 111 transitions, 1014 flow [2024-06-21 16:31:47,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:47,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:31:47,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:31:47,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 16:31:47,958 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:31:47,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:31:47,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1229620510, now seen corresponding path program 1 times [2024-06-21 16:31:47,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:31:47,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566490512] [2024-06-21 16:31:47,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:31:47,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:31:47,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:31:48,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:31:48,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:31:48,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566490512] [2024-06-21 16:31:48,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566490512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:31:48,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:31:48,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:31:48,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975958808] [2024-06-21 16:31:48,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:31:48,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:31:48,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:31:48,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:31:48,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:31:48,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 16:31:48,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 111 transitions, 1014 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:48,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:31:48,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 16:31:48,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:31:49,338 INFO L124 PetriNetUnfolderBase]: 2357/3639 cut-off events. [2024-06-21 16:31:49,338 INFO L125 PetriNetUnfolderBase]: For 68293/68296 co-relation queries the response was YES. [2024-06-21 16:31:49,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19772 conditions, 3639 events. 2357/3639 cut-off events. For 68293/68296 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 18556 event pairs, 669 based on Foata normal form. 2/3638 useless extension candidates. Maximal degree in co-relation 19725. Up to 3280 conditions per place. [2024-06-21 16:31:49,359 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 94 selfloop transitions, 35 changer transitions 0/136 dead transitions. [2024-06-21 16:31:49,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 136 transitions, 1346 flow [2024-06-21 16:31:49,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:31:49,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:31:49,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-21 16:31:49,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 16:31:49,360 INFO L175 Difference]: Start difference. First operand has 106 places, 111 transitions, 1014 flow. Second operand 6 states and 123 transitions. [2024-06-21 16:31:49,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 136 transitions, 1346 flow [2024-06-21 16:31:49,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 136 transitions, 1263 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 16:31:49,424 INFO L231 Difference]: Finished difference. Result has 107 places, 111 transitions, 1018 flow [2024-06-21 16:31:49,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=931, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1018, PETRI_PLACES=107, PETRI_TRANSITIONS=111} [2024-06-21 16:31:49,425 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-06-21 16:31:49,425 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 111 transitions, 1018 flow [2024-06-21 16:31:49,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:49,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:31:49,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:31:49,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 16:31:49,425 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:31:49,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:31:49,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1386776354, now seen corresponding path program 2 times [2024-06-21 16:31:49,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:31:49,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825736232] [2024-06-21 16:31:49,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:31:49,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:31:49,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:31:49,881 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 16:31:49,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:31:49,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825736232] [2024-06-21 16:31:49,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825736232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:31:49,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:31:49,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:31:49,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128004139] [2024-06-21 16:31:49,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:31:49,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:31:49,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:31:49,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:31:49,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:31:49,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:31:49,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 111 transitions, 1018 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:49,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:31:49,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:31:49,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:31:50,451 INFO L124 PetriNetUnfolderBase]: 2474/3753 cut-off events. [2024-06-21 16:31:50,452 INFO L125 PetriNetUnfolderBase]: For 72348/72348 co-relation queries the response was YES. [2024-06-21 16:31:50,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20479 conditions, 3753 events. 2474/3753 cut-off events. For 72348/72348 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 18571 event pairs, 839 based on Foata normal form. 1/3753 useless extension candidates. Maximal degree in co-relation 20431. Up to 3735 conditions per place. [2024-06-21 16:31:50,475 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 106 selfloop transitions, 11 changer transitions 0/120 dead transitions. [2024-06-21 16:31:50,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 120 transitions, 1274 flow [2024-06-21 16:31:50,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:31:50,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:31:50,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-21 16:31:50,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3861788617886179 [2024-06-21 16:31:50,477 INFO L175 Difference]: Start difference. First operand has 107 places, 111 transitions, 1018 flow. Second operand 6 states and 95 transitions. [2024-06-21 16:31:50,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 120 transitions, 1274 flow [2024-06-21 16:31:50,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 120 transitions, 1188 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 16:31:50,550 INFO L231 Difference]: Finished difference. Result has 108 places, 111 transitions, 960 flow [2024-06-21 16:31:50,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=932, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=960, PETRI_PLACES=108, PETRI_TRANSITIONS=111} [2024-06-21 16:31:50,550 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 66 predicate places. [2024-06-21 16:31:50,551 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 111 transitions, 960 flow [2024-06-21 16:31:50,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:50,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:31:50,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:31:50,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 16:31:50,551 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:31:50,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:31:50,551 INFO L85 PathProgramCache]: Analyzing trace with hash 204099370, now seen corresponding path program 1 times [2024-06-21 16:31:50,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:31:50,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443219415] [2024-06-21 16:31:50,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:31:50,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:31:50,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:31:51,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:31:51,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:31:51,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443219415] [2024-06-21 16:31:51,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443219415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:31:51,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:31:51,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:31:51,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587497833] [2024-06-21 16:31:51,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:31:51,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:31:51,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:31:51,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:31:51,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:31:51,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:31:51,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 111 transitions, 960 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:51,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:31:51,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:31:51,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:31:51,666 INFO L124 PetriNetUnfolderBase]: 2479/3760 cut-off events. [2024-06-21 16:31:51,667 INFO L125 PetriNetUnfolderBase]: For 76576/76576 co-relation queries the response was YES. [2024-06-21 16:31:51,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20552 conditions, 3760 events. 2479/3760 cut-off events. For 76576/76576 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 18621 event pairs, 839 based on Foata normal form. 1/3760 useless extension candidates. Maximal degree in co-relation 20503. Up to 3729 conditions per place. [2024-06-21 16:31:51,688 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 111 selfloop transitions, 16 changer transitions 0/130 dead transitions. [2024-06-21 16:31:51,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 130 transitions, 1344 flow [2024-06-21 16:31:51,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:31:51,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:31:51,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-21 16:31:51,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105691056910569 [2024-06-21 16:31:51,689 INFO L175 Difference]: Start difference. First operand has 108 places, 111 transitions, 960 flow. Second operand 6 states and 101 transitions. [2024-06-21 16:31:51,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 130 transitions, 1344 flow [2024-06-21 16:31:51,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 130 transitions, 1312 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 16:31:51,745 INFO L231 Difference]: Finished difference. Result has 109 places, 117 transitions, 1024 flow [2024-06-21 16:31:51,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=928, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1024, PETRI_PLACES=109, PETRI_TRANSITIONS=117} [2024-06-21 16:31:51,746 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 67 predicate places. [2024-06-21 16:31:51,746 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 117 transitions, 1024 flow [2024-06-21 16:31:51,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:51,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:31:51,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:31:51,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 16:31:51,747 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:31:51,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:31:51,747 INFO L85 PathProgramCache]: Analyzing trace with hash -899687552, now seen corresponding path program 2 times [2024-06-21 16:31:51,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:31:51,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633154690] [2024-06-21 16:31:51,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:31:51,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:31:51,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:31:52,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:31:52,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:31:52,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633154690] [2024-06-21 16:31:52,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633154690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:31:52,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:31:52,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:31:52,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241351798] [2024-06-21 16:31:52,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:31:52,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:31:52,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:31:52,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:31:52,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:31:52,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:31:52,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 117 transitions, 1024 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:52,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:31:52,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:31:52,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:31:52,846 INFO L124 PetriNetUnfolderBase]: 2476/3757 cut-off events. [2024-06-21 16:31:52,847 INFO L125 PetriNetUnfolderBase]: For 82843/82846 co-relation queries the response was YES. [2024-06-21 16:31:52,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21116 conditions, 3757 events. 2476/3757 cut-off events. For 82843/82846 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 18624 event pairs, 842 based on Foata normal form. 3/3758 useless extension candidates. Maximal degree in co-relation 21066. Up to 3726 conditions per place. [2024-06-21 16:31:52,870 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 107 selfloop transitions, 16 changer transitions 0/126 dead transitions. [2024-06-21 16:31:52,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 126 transitions, 1292 flow [2024-06-21 16:31:53,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:31:53,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:31:53,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-21 16:31:53,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943089430894309 [2024-06-21 16:31:53,013 INFO L175 Difference]: Start difference. First operand has 109 places, 117 transitions, 1024 flow. Second operand 6 states and 97 transitions. [2024-06-21 16:31:53,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 126 transitions, 1292 flow [2024-06-21 16:31:53,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 126 transitions, 1248 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-21 16:31:53,082 INFO L231 Difference]: Finished difference. Result has 113 places, 117 transitions, 1018 flow [2024-06-21 16:31:53,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=980, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1018, PETRI_PLACES=113, PETRI_TRANSITIONS=117} [2024-06-21 16:31:53,084 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2024-06-21 16:31:53,084 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 117 transitions, 1018 flow [2024-06-21 16:31:53,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:53,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:31:53,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:31:53,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 16:31:53,085 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:31:53,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:31:53,085 INFO L85 PathProgramCache]: Analyzing trace with hash -394954166, now seen corresponding path program 1 times [2024-06-21 16:31:53,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:31:53,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149422605] [2024-06-21 16:31:53,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:31:53,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:31:53,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:31:53,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:31:53,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:31:53,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149422605] [2024-06-21 16:31:53,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149422605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:31:53,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:31:53,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:31:53,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311886365] [2024-06-21 16:31:53,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:31:53,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:31:53,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:31:53,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:31:53,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:31:53,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:31:53,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 117 transitions, 1018 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:53,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:31:53,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:31:53,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:31:54,368 INFO L124 PetriNetUnfolderBase]: 2494/3782 cut-off events. [2024-06-21 16:31:54,369 INFO L125 PetriNetUnfolderBase]: For 88693/88696 co-relation queries the response was YES. [2024-06-21 16:31:54,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21319 conditions, 3782 events. 2494/3782 cut-off events. For 88693/88696 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 18737 event pairs, 772 based on Foata normal form. 4/3784 useless extension candidates. Maximal degree in co-relation 21267. Up to 3634 conditions per place. [2024-06-21 16:31:54,394 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 118 selfloop transitions, 37 changer transitions 0/158 dead transitions. [2024-06-21 16:31:54,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 158 transitions, 1654 flow [2024-06-21 16:31:54,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:31:54,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:31:54,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 16:31:54,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-21 16:31:54,396 INFO L175 Difference]: Start difference. First operand has 113 places, 117 transitions, 1018 flow. Second operand 7 states and 129 transitions. [2024-06-21 16:31:54,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 158 transitions, 1654 flow [2024-06-21 16:31:54,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 158 transitions, 1608 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 16:31:54,483 INFO L231 Difference]: Finished difference. Result has 116 places, 133 transitions, 1262 flow [2024-06-21 16:31:54,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=972, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1262, PETRI_PLACES=116, PETRI_TRANSITIONS=133} [2024-06-21 16:31:54,484 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 74 predicate places. [2024-06-21 16:31:54,484 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 133 transitions, 1262 flow [2024-06-21 16:31:54,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:54,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:31:54,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:31:54,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 16:31:54,485 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:31:54,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:31:54,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1474228690, now seen corresponding path program 1 times [2024-06-21 16:31:54,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:31:54,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204395815] [2024-06-21 16:31:54,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:31:54,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:31:54,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:31:55,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:31:55,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:31:55,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204395815] [2024-06-21 16:31:55,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204395815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:31:55,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:31:55,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:31:55,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853321735] [2024-06-21 16:31:55,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:31:55,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:31:55,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:31:55,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:31:55,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:31:55,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 16:31:55,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 133 transitions, 1262 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:55,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:31:55,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 16:31:55,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:31:55,938 INFO L124 PetriNetUnfolderBase]: 2462/3781 cut-off events. [2024-06-21 16:31:55,939 INFO L125 PetriNetUnfolderBase]: For 99752/99755 co-relation queries the response was YES. [2024-06-21 16:31:55,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22530 conditions, 3781 events. 2462/3781 cut-off events. For 99752/99755 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 19167 event pairs, 687 based on Foata normal form. 6/3774 useless extension candidates. Maximal degree in co-relation 22476. Up to 3328 conditions per place. [2024-06-21 16:31:55,967 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 123 selfloop transitions, 39 changer transitions 0/174 dead transitions. [2024-06-21 16:31:55,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 174 transitions, 1793 flow [2024-06-21 16:31:55,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:31:55,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:31:55,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 16:31:55,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-06-21 16:31:55,969 INFO L175 Difference]: Start difference. First operand has 116 places, 133 transitions, 1262 flow. Second operand 8 states and 151 transitions. [2024-06-21 16:31:55,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 174 transitions, 1793 flow [2024-06-21 16:31:56,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 174 transitions, 1727 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-21 16:31:56,049 INFO L231 Difference]: Finished difference. Result has 124 places, 144 transitions, 1449 flow [2024-06-21 16:31:56,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1202, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1449, PETRI_PLACES=124, PETRI_TRANSITIONS=144} [2024-06-21 16:31:56,050 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 82 predicate places. [2024-06-21 16:31:56,050 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 144 transitions, 1449 flow [2024-06-21 16:31:56,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:56,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:31:56,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:31:56,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 16:31:56,050 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:31:56,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:31:56,051 INFO L85 PathProgramCache]: Analyzing trace with hash -600663864, now seen corresponding path program 2 times [2024-06-21 16:31:56,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:31:56,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232810559] [2024-06-21 16:31:56,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:31:56,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:31:56,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:31:56,615 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 16:31:56,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:31:56,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232810559] [2024-06-21 16:31:56,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232810559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:31:56,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:31:56,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:31:56,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976595633] [2024-06-21 16:31:56,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:31:56,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:31:56,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:31:56,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:31:56,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:31:56,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:31:56,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 144 transitions, 1449 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:56,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:31:56,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:31:56,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:31:57,167 INFO L124 PetriNetUnfolderBase]: 2578/3907 cut-off events. [2024-06-21 16:31:57,167 INFO L125 PetriNetUnfolderBase]: For 105790/105793 co-relation queries the response was YES. [2024-06-21 16:31:57,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23875 conditions, 3907 events. 2578/3907 cut-off events. For 105790/105793 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 19429 event pairs, 784 based on Foata normal form. 4/3909 useless extension candidates. Maximal degree in co-relation 23817. Up to 3748 conditions per place. [2024-06-21 16:31:57,195 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 125 selfloop transitions, 42 changer transitions 0/170 dead transitions. [2024-06-21 16:31:57,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 170 transitions, 2025 flow [2024-06-21 16:31:57,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:31:57,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:31:57,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 16:31:57,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 16:31:57,196 INFO L175 Difference]: Start difference. First operand has 124 places, 144 transitions, 1449 flow. Second operand 7 states and 123 transitions. [2024-06-21 16:31:57,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 170 transitions, 2025 flow [2024-06-21 16:31:57,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 170 transitions, 1967 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-21 16:31:57,285 INFO L231 Difference]: Finished difference. Result has 130 places, 152 transitions, 1591 flow [2024-06-21 16:31:57,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1391, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1591, PETRI_PLACES=130, PETRI_TRANSITIONS=152} [2024-06-21 16:31:57,285 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-21 16:31:57,285 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 152 transitions, 1591 flow [2024-06-21 16:31:57,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:57,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:31:57,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:31:57,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 16:31:57,286 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:31:57,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:31:57,286 INFO L85 PathProgramCache]: Analyzing trace with hash -394655264, now seen corresponding path program 1 times [2024-06-21 16:31:57,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:31:57,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613218862] [2024-06-21 16:31:57,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:31:57,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:31:57,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:31:57,982 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 16:31:57,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:31:57,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613218862] [2024-06-21 16:31:57,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613218862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:31:57,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:31:57,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:31:57,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251561396] [2024-06-21 16:31:57,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:31:57,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:31:57,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:31:57,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:31:57,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:31:58,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:31:58,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 152 transitions, 1591 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:58,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:31:58,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:31:58,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:31:58,550 INFO L124 PetriNetUnfolderBase]: 2609/3949 cut-off events. [2024-06-21 16:31:58,551 INFO L125 PetriNetUnfolderBase]: For 114122/114122 co-relation queries the response was YES. [2024-06-21 16:31:58,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24507 conditions, 3949 events. 2609/3949 cut-off events. For 114122/114122 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 19641 event pairs, 783 based on Foata normal form. 3/3951 useless extension candidates. Maximal degree in co-relation 24446. Up to 3885 conditions per place. [2024-06-21 16:31:58,584 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 156 selfloop transitions, 23 changer transitions 0/182 dead transitions. [2024-06-21 16:31:58,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 182 transitions, 2153 flow [2024-06-21 16:31:58,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:31:58,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:31:58,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 16:31:58,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-21 16:31:58,602 INFO L175 Difference]: Start difference. First operand has 130 places, 152 transitions, 1591 flow. Second operand 7 states and 122 transitions. [2024-06-21 16:31:58,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 182 transitions, 2153 flow [2024-06-21 16:31:58,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 182 transitions, 2080 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 16:31:58,730 INFO L231 Difference]: Finished difference. Result has 135 places, 161 transitions, 1688 flow [2024-06-21 16:31:58,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1518, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1688, PETRI_PLACES=135, PETRI_TRANSITIONS=161} [2024-06-21 16:31:58,731 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 93 predicate places. [2024-06-21 16:31:58,731 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 161 transitions, 1688 flow [2024-06-21 16:31:58,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:58,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:31:58,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:31:58,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 16:31:58,732 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:31:58,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:31:58,732 INFO L85 PathProgramCache]: Analyzing trace with hash 279978540, now seen corresponding path program 2 times [2024-06-21 16:31:58,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:31:58,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796447900] [2024-06-21 16:31:58,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:31:58,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:31:58,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:31:59,527 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 16:31:59,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:31:59,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796447900] [2024-06-21 16:31:59,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796447900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:31:59,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:31:59,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:31:59,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541571535] [2024-06-21 16:31:59,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:31:59,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:31:59,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:31:59,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:31:59,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:31:59,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 16:31:59,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 161 transitions, 1688 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:59,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:31:59,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 16:31:59,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:00,201 INFO L124 PetriNetUnfolderBase]: 2512/3850 cut-off events. [2024-06-21 16:32:00,201 INFO L125 PetriNetUnfolderBase]: For 123200/123203 co-relation queries the response was YES. [2024-06-21 16:32:00,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24632 conditions, 3850 events. 2512/3850 cut-off events. For 123200/123203 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 19526 event pairs, 683 based on Foata normal form. 6/3843 useless extension candidates. Maximal degree in co-relation 24569. Up to 3327 conditions per place. [2024-06-21 16:32:00,234 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 134 selfloop transitions, 42 changer transitions 0/190 dead transitions. [2024-06-21 16:32:00,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 190 transitions, 2164 flow [2024-06-21 16:32:00,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:32:00,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:32:00,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-21 16:32:00,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 16:32:00,236 INFO L175 Difference]: Start difference. First operand has 135 places, 161 transitions, 1688 flow. Second operand 7 states and 133 transitions. [2024-06-21 16:32:00,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 190 transitions, 2164 flow [2024-06-21 16:32:00,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 190 transitions, 2120 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-21 16:32:00,416 INFO L231 Difference]: Finished difference. Result has 141 places, 165 transitions, 1820 flow [2024-06-21 16:32:00,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1644, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1820, PETRI_PLACES=141, PETRI_TRANSITIONS=165} [2024-06-21 16:32:00,416 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2024-06-21 16:32:00,416 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 165 transitions, 1820 flow [2024-06-21 16:32:00,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:00,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:00,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:00,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 16:32:00,417 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:32:00,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:00,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1026836046, now seen corresponding path program 3 times [2024-06-21 16:32:00,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:00,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202831165] [2024-06-21 16:32:00,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:00,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:00,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:01,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:01,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:01,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202831165] [2024-06-21 16:32:01,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202831165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:01,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:01,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:32:01,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437542287] [2024-06-21 16:32:01,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:01,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:32:01,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:01,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:32:01,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:32:01,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 16:32:01,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 165 transitions, 1820 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:01,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:01,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 16:32:01,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:01,994 INFO L124 PetriNetUnfolderBase]: 2521/3869 cut-off events. [2024-06-21 16:32:01,994 INFO L125 PetriNetUnfolderBase]: For 130880/130883 co-relation queries the response was YES. [2024-06-21 16:32:02,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25354 conditions, 3869 events. 2521/3869 cut-off events. For 130880/130883 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 19641 event pairs, 707 based on Foata normal form. 4/3870 useless extension candidates. Maximal degree in co-relation 25287. Up to 3637 conditions per place. [2024-06-21 16:32:02,027 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 158 selfloop transitions, 17 changer transitions 0/189 dead transitions. [2024-06-21 16:32:02,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 189 transitions, 2258 flow [2024-06-21 16:32:02,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:32:02,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:32:02,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 16:32:02,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 16:32:02,029 INFO L175 Difference]: Start difference. First operand has 141 places, 165 transitions, 1820 flow. Second operand 7 states and 126 transitions. [2024-06-21 16:32:02,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 189 transitions, 2258 flow [2024-06-21 16:32:02,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 189 transitions, 2178 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-21 16:32:02,234 INFO L231 Difference]: Finished difference. Result has 145 places, 167 transitions, 1819 flow [2024-06-21 16:32:02,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1742, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1819, PETRI_PLACES=145, PETRI_TRANSITIONS=167} [2024-06-21 16:32:02,234 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 103 predicate places. [2024-06-21 16:32:02,234 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 167 transitions, 1819 flow [2024-06-21 16:32:02,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:02,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:02,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:02,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 16:32:02,235 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:32:02,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:02,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1017639276, now seen corresponding path program 4 times [2024-06-21 16:32:02,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:02,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778847615] [2024-06-21 16:32:02,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:02,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:02,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:03,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:03,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:03,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778847615] [2024-06-21 16:32:03,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778847615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:03,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:03,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:32:03,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897162365] [2024-06-21 16:32:03,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:03,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:32:03,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:03,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:32:03,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:32:03,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 16:32:03,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 167 transitions, 1819 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:03,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:03,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 16:32:03,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:03,896 INFO L124 PetriNetUnfolderBase]: 2546/3904 cut-off events. [2024-06-21 16:32:03,897 INFO L125 PetriNetUnfolderBase]: For 131484/131487 co-relation queries the response was YES. [2024-06-21 16:32:03,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25570 conditions, 3904 events. 2546/3904 cut-off events. For 131484/131487 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 19882 event pairs, 678 based on Foata normal form. 4/3895 useless extension candidates. Maximal degree in co-relation 25501. Up to 3289 conditions per place. [2024-06-21 16:32:03,928 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 129 selfloop transitions, 55 changer transitions 0/198 dead transitions. [2024-06-21 16:32:03,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 198 transitions, 2429 flow [2024-06-21 16:32:03,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:32:03,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:32:03,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 16:32:03,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738675958188153 [2024-06-21 16:32:03,930 INFO L175 Difference]: Start difference. First operand has 145 places, 167 transitions, 1819 flow. Second operand 7 states and 136 transitions. [2024-06-21 16:32:03,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 198 transitions, 2429 flow [2024-06-21 16:32:04,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 198 transitions, 2370 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 16:32:04,073 INFO L231 Difference]: Finished difference. Result has 147 places, 171 transitions, 1960 flow [2024-06-21 16:32:04,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1760, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1960, PETRI_PLACES=147, PETRI_TRANSITIONS=171} [2024-06-21 16:32:04,074 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 105 predicate places. [2024-06-21 16:32:04,074 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 171 transitions, 1960 flow [2024-06-21 16:32:04,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:04,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:04,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:04,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 16:32:04,075 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:32:04,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:04,075 INFO L85 PathProgramCache]: Analyzing trace with hash -2137728, now seen corresponding path program 5 times [2024-06-21 16:32:04,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:04,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173402632] [2024-06-21 16:32:04,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:04,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:04,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:04,820 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 16:32:04,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:04,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173402632] [2024-06-21 16:32:04,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173402632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:04,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:04,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:32:04,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593656503] [2024-06-21 16:32:04,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:04,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:32:04,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:04,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:32:04,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:32:04,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 16:32:04,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 171 transitions, 1960 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:04,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:04,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 16:32:04,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:05,544 INFO L124 PetriNetUnfolderBase]: 2530/3884 cut-off events. [2024-06-21 16:32:05,544 INFO L125 PetriNetUnfolderBase]: For 137728/137731 co-relation queries the response was YES. [2024-06-21 16:32:05,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25891 conditions, 3884 events. 2530/3884 cut-off events. For 137728/137731 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 19777 event pairs, 690 based on Foata normal form. 4/3885 useless extension candidates. Maximal degree in co-relation 25821. Up to 3440 conditions per place. [2024-06-21 16:32:05,569 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 137 selfloop transitions, 49 changer transitions 0/200 dead transitions. [2024-06-21 16:32:05,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 200 transitions, 2416 flow [2024-06-21 16:32:05,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:32:05,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:32:05,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-21 16:32:05,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4843205574912892 [2024-06-21 16:32:05,571 INFO L175 Difference]: Start difference. First operand has 147 places, 171 transitions, 1960 flow. Second operand 7 states and 139 transitions. [2024-06-21 16:32:05,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 200 transitions, 2416 flow [2024-06-21 16:32:05,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 200 transitions, 2322 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-21 16:32:05,759 INFO L231 Difference]: Finished difference. Result has 151 places, 172 transitions, 1989 flow [2024-06-21 16:32:05,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1866, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1989, PETRI_PLACES=151, PETRI_TRANSITIONS=172} [2024-06-21 16:32:05,759 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 109 predicate places. [2024-06-21 16:32:05,759 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 172 transitions, 1989 flow [2024-06-21 16:32:05,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:05,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:05,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:05,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 16:32:05,760 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:32:05,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:05,776 INFO L85 PathProgramCache]: Analyzing trace with hash -40392224, now seen corresponding path program 2 times [2024-06-21 16:32:05,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:05,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99058854] [2024-06-21 16:32:05,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:05,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:05,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:06,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:06,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:06,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99058854] [2024-06-21 16:32:06,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99058854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:06,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:06,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:32:06,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412127872] [2024-06-21 16:32:06,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:06,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:32:06,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:06,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:32:06,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:32:06,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:32:06,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 172 transitions, 1989 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:06,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:06,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:32:06,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:07,189 INFO L124 PetriNetUnfolderBase]: 2642/4000 cut-off events. [2024-06-21 16:32:07,189 INFO L125 PetriNetUnfolderBase]: For 143603/143603 co-relation queries the response was YES. [2024-06-21 16:32:07,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26739 conditions, 4000 events. 2642/4000 cut-off events. For 143603/143603 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 19929 event pairs, 773 based on Foata normal form. 3/4002 useless extension candidates. Maximal degree in co-relation 26667. Up to 3956 conditions per place. [2024-06-21 16:32:07,227 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 168 selfloop transitions, 19 changer transitions 0/190 dead transitions. [2024-06-21 16:32:07,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 190 transitions, 2515 flow [2024-06-21 16:32:07,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:32:07,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:32:07,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-21 16:32:07,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-21 16:32:07,244 INFO L175 Difference]: Start difference. First operand has 151 places, 172 transitions, 1989 flow. Second operand 7 states and 114 transitions. [2024-06-21 16:32:07,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 190 transitions, 2515 flow [2024-06-21 16:32:07,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 190 transitions, 2402 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 16:32:07,431 INFO L231 Difference]: Finished difference. Result has 152 places, 175 transitions, 1970 flow [2024-06-21 16:32:07,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1876, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1970, PETRI_PLACES=152, PETRI_TRANSITIONS=175} [2024-06-21 16:32:07,431 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 110 predicate places. [2024-06-21 16:32:07,431 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 175 transitions, 1970 flow [2024-06-21 16:32:07,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:07,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:07,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:07,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 16:32:07,432 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:32:07,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:07,433 INFO L85 PathProgramCache]: Analyzing trace with hash -40392596, now seen corresponding path program 3 times [2024-06-21 16:32:07,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:07,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561198242] [2024-06-21 16:32:07,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:07,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:07,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:07,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:07,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:07,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561198242] [2024-06-21 16:32:07,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561198242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:07,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:07,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:32:07,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225810546] [2024-06-21 16:32:07,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:07,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:32:07,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:07,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:32:07,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:32:08,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:32:08,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 175 transitions, 1970 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:08,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:08,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:32:08,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:08,626 INFO L124 PetriNetUnfolderBase]: 2638/3996 cut-off events. [2024-06-21 16:32:08,627 INFO L125 PetriNetUnfolderBase]: For 148736/148739 co-relation queries the response was YES. [2024-06-21 16:32:08,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26659 conditions, 3996 events. 2638/3996 cut-off events. For 148736/148739 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 19941 event pairs, 780 based on Foata normal form. 4/3998 useless extension candidates. Maximal degree in co-relation 26586. Up to 3943 conditions per place. [2024-06-21 16:32:08,660 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 158 selfloop transitions, 25 changer transitions 0/186 dead transitions. [2024-06-21 16:32:08,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 186 transitions, 2428 flow [2024-06-21 16:32:08,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:32:08,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:32:08,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-21 16:32:08,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39372822299651566 [2024-06-21 16:32:08,661 INFO L175 Difference]: Start difference. First operand has 152 places, 175 transitions, 1970 flow. Second operand 7 states and 113 transitions. [2024-06-21 16:32:08,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 186 transitions, 2428 flow [2024-06-21 16:32:08,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 186 transitions, 2332 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 16:32:08,846 INFO L231 Difference]: Finished difference. Result has 154 places, 175 transitions, 1932 flow [2024-06-21 16:32:08,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1874, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1932, PETRI_PLACES=154, PETRI_TRANSITIONS=175} [2024-06-21 16:32:08,901 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 112 predicate places. [2024-06-21 16:32:08,901 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 175 transitions, 1932 flow [2024-06-21 16:32:08,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:08,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:08,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:08,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 16:32:08,902 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:32:08,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:08,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1675988608, now seen corresponding path program 3 times [2024-06-21 16:32:08,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:08,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015473269] [2024-06-21 16:32:08,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:08,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:08,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:09,380 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 16:32:09,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:09,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015473269] [2024-06-21 16:32:09,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015473269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:09,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:09,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:32:09,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585255722] [2024-06-21 16:32:09,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:09,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:32:09,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:09,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:32:09,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:32:09,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:32:09,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 175 transitions, 1932 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:09,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:09,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:32:09,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:10,033 INFO L124 PetriNetUnfolderBase]: 2629/3983 cut-off events. [2024-06-21 16:32:10,034 INFO L125 PetriNetUnfolderBase]: For 154524/154524 co-relation queries the response was YES. [2024-06-21 16:32:10,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26583 conditions, 3983 events. 2629/3983 cut-off events. For 154524/154524 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 19872 event pairs, 774 based on Foata normal form. 3/3985 useless extension candidates. Maximal degree in co-relation 26510. Up to 3956 conditions per place. [2024-06-21 16:32:10,069 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 170 selfloop transitions, 14 changer transitions 0/187 dead transitions. [2024-06-21 16:32:10,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 187 transitions, 2330 flow [2024-06-21 16:32:10,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:32:10,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:32:10,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-21 16:32:10,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3797909407665505 [2024-06-21 16:32:10,071 INFO L175 Difference]: Start difference. First operand has 154 places, 175 transitions, 1932 flow. Second operand 7 states and 109 transitions. [2024-06-21 16:32:10,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 187 transitions, 2330 flow [2024-06-21 16:32:10,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 187 transitions, 2217 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 16:32:10,286 INFO L231 Difference]: Finished difference. Result has 155 places, 175 transitions, 1853 flow [2024-06-21 16:32:10,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1819, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1853, PETRI_PLACES=155, PETRI_TRANSITIONS=175} [2024-06-21 16:32:10,286 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 113 predicate places. [2024-06-21 16:32:10,287 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 175 transitions, 1853 flow [2024-06-21 16:32:10,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:10,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:10,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:10,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 16:32:10,287 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:32:10,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:10,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1669323484, now seen corresponding path program 1 times [2024-06-21 16:32:10,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:10,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910591616] [2024-06-21 16:32:10,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:10,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:10,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:10,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:10,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:10,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910591616] [2024-06-21 16:32:10,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910591616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:10,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:10,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:32:10,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392664970] [2024-06-21 16:32:10,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:10,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:32:10,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:10,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:32:10,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:32:10,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:32:10,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 175 transitions, 1853 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:10,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:10,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:32:10,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:11,648 INFO L124 PetriNetUnfolderBase]: 2639/3997 cut-off events. [2024-06-21 16:32:11,648 INFO L125 PetriNetUnfolderBase]: For 161154/161154 co-relation queries the response was YES. [2024-06-21 16:32:11,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26651 conditions, 3997 events. 2639/3997 cut-off events. For 161154/161154 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 19918 event pairs, 773 based on Foata normal form. 2/3998 useless extension candidates. Maximal degree in co-relation 26579. Up to 3950 conditions per place. [2024-06-21 16:32:11,680 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 176 selfloop transitions, 16 changer transitions 0/195 dead transitions. [2024-06-21 16:32:11,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 195 transitions, 2315 flow [2024-06-21 16:32:11,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:32:11,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:32:11,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-21 16:32:11,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40069686411149824 [2024-06-21 16:32:11,681 INFO L175 Difference]: Start difference. First operand has 155 places, 175 transitions, 1853 flow. Second operand 7 states and 115 transitions. [2024-06-21 16:32:11,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 195 transitions, 2315 flow [2024-06-21 16:32:11,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 195 transitions, 2252 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 16:32:11,832 INFO L231 Difference]: Finished difference. Result has 155 places, 178 transitions, 1869 flow [2024-06-21 16:32:11,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1790, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1869, PETRI_PLACES=155, PETRI_TRANSITIONS=178} [2024-06-21 16:32:11,832 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 113 predicate places. [2024-06-21 16:32:11,833 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 178 transitions, 1869 flow [2024-06-21 16:32:11,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:11,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:11,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:11,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 16:32:11,833 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:32:11,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:11,833 INFO L85 PathProgramCache]: Analyzing trace with hash -217339418, now seen corresponding path program 2 times [2024-06-21 16:32:11,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:11,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714547582] [2024-06-21 16:32:11,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:11,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:11,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:12,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:12,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:12,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714547582] [2024-06-21 16:32:12,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714547582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:12,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:12,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:32:12,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875522725] [2024-06-21 16:32:12,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:12,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:32:12,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:12,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:32:12,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:32:12,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:32:12,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 178 transitions, 1869 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:12,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:12,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:32:12,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:13,267 INFO L124 PetriNetUnfolderBase]: 2649/4011 cut-off events. [2024-06-21 16:32:13,268 INFO L125 PetriNetUnfolderBase]: For 168756/168756 co-relation queries the response was YES. [2024-06-21 16:32:13,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27135 conditions, 4011 events. 2649/4011 cut-off events. For 168756/168756 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 19990 event pairs, 774 based on Foata normal form. 2/4012 useless extension candidates. Maximal degree in co-relation 27063. Up to 3940 conditions per place. [2024-06-21 16:32:13,303 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 170 selfloop transitions, 28 changer transitions 0/201 dead transitions. [2024-06-21 16:32:13,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 201 transitions, 2463 flow [2024-06-21 16:32:13,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:32:13,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:32:13,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 16:32:13,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2024-06-21 16:32:13,304 INFO L175 Difference]: Start difference. First operand has 155 places, 178 transitions, 1869 flow. Second operand 7 states and 118 transitions. [2024-06-21 16:32:13,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 201 transitions, 2463 flow [2024-06-21 16:32:13,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 201 transitions, 2410 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 16:32:13,533 INFO L231 Difference]: Finished difference. Result has 157 places, 184 transitions, 1964 flow [2024-06-21 16:32:13,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1816, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1964, PETRI_PLACES=157, PETRI_TRANSITIONS=184} [2024-06-21 16:32:13,534 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 115 predicate places. [2024-06-21 16:32:13,534 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 184 transitions, 1964 flow [2024-06-21 16:32:13,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:13,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:13,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:13,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 16:32:13,534 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:32:13,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:13,535 INFO L85 PathProgramCache]: Analyzing trace with hash -217339232, now seen corresponding path program 1 times [2024-06-21 16:32:13,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:13,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583378973] [2024-06-21 16:32:13,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:13,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:13,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:14,024 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 16:32:14,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:14,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583378973] [2024-06-21 16:32:14,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583378973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:14,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:14,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:32:14,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124746012] [2024-06-21 16:32:14,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:14,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:32:14,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:14,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:32:14,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:32:14,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:32:14,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 184 transitions, 1964 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:14,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:14,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:32:14,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:14,893 INFO L124 PetriNetUnfolderBase]: 2664/4032 cut-off events. [2024-06-21 16:32:14,893 INFO L125 PetriNetUnfolderBase]: For 179711/179711 co-relation queries the response was YES. [2024-06-21 16:32:14,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27812 conditions, 4032 events. 2664/4032 cut-off events. For 179711/179711 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 20106 event pairs, 773 based on Foata normal form. 3/4034 useless extension candidates. Maximal degree in co-relation 27739. Up to 3964 conditions per place. [2024-06-21 16:32:14,924 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 181 selfloop transitions, 25 changer transitions 0/209 dead transitions. [2024-06-21 16:32:14,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 209 transitions, 2566 flow [2024-06-21 16:32:14,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:32:14,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:32:14,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 16:32:14,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160278745644597 [2024-06-21 16:32:14,926 INFO L175 Difference]: Start difference. First operand has 157 places, 184 transitions, 1964 flow. Second operand 7 states and 121 transitions. [2024-06-21 16:32:14,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 209 transitions, 2566 flow [2024-06-21 16:32:15,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 209 transitions, 2509 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-21 16:32:15,150 INFO L231 Difference]: Finished difference. Result has 161 places, 190 transitions, 2037 flow [2024-06-21 16:32:15,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1911, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2037, PETRI_PLACES=161, PETRI_TRANSITIONS=190} [2024-06-21 16:32:15,150 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 119 predicate places. [2024-06-21 16:32:15,150 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 190 transitions, 2037 flow [2024-06-21 16:32:15,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:15,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:15,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:15,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 16:32:15,151 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:32:15,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:15,151 INFO L85 PathProgramCache]: Analyzing trace with hash -2120508732, now seen corresponding path program 3 times [2024-06-21 16:32:15,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:15,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545527939] [2024-06-21 16:32:15,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:15,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:15,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:15,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:15,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:15,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545527939] [2024-06-21 16:32:15,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545527939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:15,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:15,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:32:15,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881096310] [2024-06-21 16:32:15,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:15,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:32:15,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:15,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:32:15,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:32:15,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:32:15,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 190 transitions, 2037 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:15,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:15,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:32:15,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:16,347 INFO L124 PetriNetUnfolderBase]: 2658/4026 cut-off events. [2024-06-21 16:32:16,347 INFO L125 PetriNetUnfolderBase]: For 186301/186304 co-relation queries the response was YES. [2024-06-21 16:32:16,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28180 conditions, 4026 events. 2658/4026 cut-off events. For 186301/186304 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 20107 event pairs, 784 based on Foata normal form. 2/4025 useless extension candidates. Maximal degree in co-relation 28105. Up to 3956 conditions per place. [2024-06-21 16:32:16,439 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 171 selfloop transitions, 28 changer transitions 0/202 dead transitions. [2024-06-21 16:32:16,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 202 transitions, 2467 flow [2024-06-21 16:32:16,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:32:16,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:32:16,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-21 16:32:16,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-21 16:32:16,440 INFO L175 Difference]: Start difference. First operand has 161 places, 190 transitions, 2037 flow. Second operand 7 states and 114 transitions. [2024-06-21 16:32:16,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 202 transitions, 2467 flow [2024-06-21 16:32:16,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 202 transitions, 2403 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-21 16:32:16,651 INFO L231 Difference]: Finished difference. Result has 165 places, 190 transitions, 2035 flow [2024-06-21 16:32:16,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1973, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2035, PETRI_PLACES=165, PETRI_TRANSITIONS=190} [2024-06-21 16:32:16,652 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 123 predicate places. [2024-06-21 16:32:16,652 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 190 transitions, 2035 flow [2024-06-21 16:32:16,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:16,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:16,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:16,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 16:32:16,653 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:32:16,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:16,654 INFO L85 PathProgramCache]: Analyzing trace with hash -39970562, now seen corresponding path program 2 times [2024-06-21 16:32:16,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:16,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415172346] [2024-06-21 16:32:16,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:16,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:16,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:17,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:17,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:17,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415172346] [2024-06-21 16:32:17,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415172346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:17,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:17,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:32:17,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837149262] [2024-06-21 16:32:17,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:17,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:32:17,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:17,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:32:17,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:32:17,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:32:17,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 190 transitions, 2035 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:17,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:17,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:32:17,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:17,951 INFO L124 PetriNetUnfolderBase]: 2673/4046 cut-off events. [2024-06-21 16:32:17,952 INFO L125 PetriNetUnfolderBase]: For 195312/195315 co-relation queries the response was YES. [2024-06-21 16:32:17,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28499 conditions, 4046 events. 2673/4046 cut-off events. For 195312/195315 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 20279 event pairs, 772 based on Foata normal form. 5/4049 useless extension candidates. Maximal degree in co-relation 28422. Up to 3970 conditions per place. [2024-06-21 16:32:17,986 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 176 selfloop transitions, 29 changer transitions 0/208 dead transitions. [2024-06-21 16:32:17,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 208 transitions, 2595 flow [2024-06-21 16:32:17,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:32:17,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:32:17,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-21 16:32:17,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40069686411149824 [2024-06-21 16:32:17,987 INFO L175 Difference]: Start difference. First operand has 165 places, 190 transitions, 2035 flow. Second operand 7 states and 115 transitions. [2024-06-21 16:32:17,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 208 transitions, 2595 flow [2024-06-21 16:32:18,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 208 transitions, 2507 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 16:32:18,186 INFO L231 Difference]: Finished difference. Result has 165 places, 193 transitions, 2046 flow [2024-06-21 16:32:18,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1947, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2046, PETRI_PLACES=165, PETRI_TRANSITIONS=193} [2024-06-21 16:32:18,186 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 123 predicate places. [2024-06-21 16:32:18,186 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 193 transitions, 2046 flow [2024-06-21 16:32:18,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:18,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:18,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:18,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 16:32:18,187 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:32:18,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:18,187 INFO L85 PathProgramCache]: Analyzing trace with hash -40207712, now seen corresponding path program 3 times [2024-06-21 16:32:18,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:18,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350551686] [2024-06-21 16:32:18,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:18,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:18,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:18,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:18,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:18,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350551686] [2024-06-21 16:32:18,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350551686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:18,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:18,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:32:18,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471751883] [2024-06-21 16:32:18,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:18,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:32:18,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:18,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:32:18,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:32:18,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:32:18,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 193 transitions, 2046 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:18,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:18,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:32:18,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:19,448 INFO L124 PetriNetUnfolderBase]: 2664/4034 cut-off events. [2024-06-21 16:32:19,448 INFO L125 PetriNetUnfolderBase]: For 201787/201790 co-relation queries the response was YES. [2024-06-21 16:32:19,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28503 conditions, 4034 events. 2664/4034 cut-off events. For 201787/201790 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 20166 event pairs, 770 based on Foata normal form. 5/4037 useless extension candidates. Maximal degree in co-relation 28426. Up to 3963 conditions per place. [2024-06-21 16:32:19,485 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 178 selfloop transitions, 28 changer transitions 0/209 dead transitions. [2024-06-21 16:32:19,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 209 transitions, 2500 flow [2024-06-21 16:32:19,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:32:19,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:32:19,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 16:32:19,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-21 16:32:19,488 INFO L175 Difference]: Start difference. First operand has 165 places, 193 transitions, 2046 flow. Second operand 7 states and 117 transitions. [2024-06-21 16:32:19,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 209 transitions, 2500 flow [2024-06-21 16:32:19,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 209 transitions, 2417 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 16:32:19,726 INFO L231 Difference]: Finished difference. Result has 168 places, 193 transitions, 2025 flow [2024-06-21 16:32:19,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1963, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2025, PETRI_PLACES=168, PETRI_TRANSITIONS=193} [2024-06-21 16:32:19,727 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 126 predicate places. [2024-06-21 16:32:19,727 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 193 transitions, 2025 flow [2024-06-21 16:32:19,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:19,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:19,728 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 16:32:19,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 16:32:19,728 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:32:19,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:19,728 INFO L85 PathProgramCache]: Analyzing trace with hash 641055421, now seen corresponding path program 1 times [2024-06-21 16:32:19,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:19,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962288720] [2024-06-21 16:32:19,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:19,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:19,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:20,510 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 16:32:20,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:20,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962288720] [2024-06-21 16:32:20,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962288720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:20,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:20,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:32:20,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391939574] [2024-06-21 16:32:20,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:20,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:32:20,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:20,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:32:20,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:32:20,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:32:20,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 193 transitions, 2025 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:32:20,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:20,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:32:20,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:21,283 INFO L124 PetriNetUnfolderBase]: 2682/4059 cut-off events. [2024-06-21 16:32:21,283 INFO L125 PetriNetUnfolderBase]: For 210396/210399 co-relation queries the response was YES. [2024-06-21 16:32:21,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28810 conditions, 4059 events. 2682/4059 cut-off events. For 210396/210399 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 20323 event pairs, 765 based on Foata normal form. 4/4061 useless extension candidates. Maximal degree in co-relation 28732. Up to 3855 conditions per place. [2024-06-21 16:32:21,324 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 174 selfloop transitions, 58 changer transitions 0/235 dead transitions. [2024-06-21 16:32:21,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 235 transitions, 2855 flow [2024-06-21 16:32:21,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:32:21,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:32:21,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 16:32:21,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 16:32:21,325 INFO L175 Difference]: Start difference. First operand has 168 places, 193 transitions, 2025 flow. Second operand 9 states and 162 transitions. [2024-06-21 16:32:21,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 235 transitions, 2855 flow [2024-06-21 16:32:21,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 235 transitions, 2774 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 16:32:21,588 INFO L231 Difference]: Finished difference. Result has 171 places, 203 transitions, 2212 flow [2024-06-21 16:32:21,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1944, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2212, PETRI_PLACES=171, PETRI_TRANSITIONS=203} [2024-06-21 16:32:21,588 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 129 predicate places. [2024-06-21 16:32:21,588 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 203 transitions, 2212 flow [2024-06-21 16:32:21,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:32:21,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:21,589 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 16:32:21,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 16:32:21,589 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:32:21,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:21,589 INFO L85 PathProgramCache]: Analyzing trace with hash 641324532, now seen corresponding path program 1 times [2024-06-21 16:32:21,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:21,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444893102] [2024-06-21 16:32:21,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:21,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:21,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:22,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:22,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:22,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444893102] [2024-06-21 16:32:22,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444893102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:22,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:22,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:32:22,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48175069] [2024-06-21 16:32:22,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:22,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:32:22,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:22,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:32:22,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:32:22,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:32:22,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 203 transitions, 2212 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:32:22,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:22,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:32:22,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:22,932 INFO L124 PetriNetUnfolderBase]: 2784/4200 cut-off events. [2024-06-21 16:32:22,932 INFO L125 PetriNetUnfolderBase]: For 233559/233562 co-relation queries the response was YES. [2024-06-21 16:32:22,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30878 conditions, 4200 events. 2784/4200 cut-off events. For 233559/233562 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 21110 event pairs, 779 based on Foata normal form. 8/4206 useless extension candidates. Maximal degree in co-relation 30798. Up to 3851 conditions per place. [2024-06-21 16:32:22,972 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 185 selfloop transitions, 65 changer transitions 0/253 dead transitions. [2024-06-21 16:32:22,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 253 transitions, 3154 flow [2024-06-21 16:32:22,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:32:22,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:32:22,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 16:32:22,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-06-21 16:32:22,974 INFO L175 Difference]: Start difference. First operand has 171 places, 203 transitions, 2212 flow. Second operand 8 states and 151 transitions. [2024-06-21 16:32:22,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 253 transitions, 3154 flow [2024-06-21 16:32:23,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 253 transitions, 3023 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-21 16:32:23,242 INFO L231 Difference]: Finished difference. Result has 176 places, 222 transitions, 2493 flow [2024-06-21 16:32:23,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2081, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2493, PETRI_PLACES=176, PETRI_TRANSITIONS=222} [2024-06-21 16:32:23,243 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 134 predicate places. [2024-06-21 16:32:23,243 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 222 transitions, 2493 flow [2024-06-21 16:32:23,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:32:23,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:23,243 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 16:32:23,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 16:32:23,243 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:32:23,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:23,244 INFO L85 PathProgramCache]: Analyzing trace with hash 644868669, now seen corresponding path program 1 times [2024-06-21 16:32:23,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:23,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220626757] [2024-06-21 16:32:23,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:23,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:23,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:23,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:23,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:23,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220626757] [2024-06-21 16:32:23,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220626757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:23,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:23,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:32:23,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60324348] [2024-06-21 16:32:23,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:23,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:32:23,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:23,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:32:23,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:32:23,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:32:23,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 222 transitions, 2493 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:23,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:23,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:32:23,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:24,425 INFO L124 PetriNetUnfolderBase]: 2810/4236 cut-off events. [2024-06-21 16:32:24,425 INFO L125 PetriNetUnfolderBase]: For 245498/245501 co-relation queries the response was YES. [2024-06-21 16:32:24,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32454 conditions, 4236 events. 2810/4236 cut-off events. For 245498/245501 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 21324 event pairs, 779 based on Foata normal form. 4/4238 useless extension candidates. Maximal degree in co-relation 32370. Up to 4066 conditions per place. [2024-06-21 16:32:24,462 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 196 selfloop transitions, 54 changer transitions 0/253 dead transitions. [2024-06-21 16:32:24,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 253 transitions, 3370 flow [2024-06-21 16:32:24,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:32:24,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:32:24,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 16:32:24,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 16:32:24,464 INFO L175 Difference]: Start difference. First operand has 176 places, 222 transitions, 2493 flow. Second operand 7 states and 126 transitions. [2024-06-21 16:32:24,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 253 transitions, 3370 flow [2024-06-21 16:32:24,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 253 transitions, 3297 flow, removed 33 selfloop flow, removed 2 redundant places. [2024-06-21 16:32:24,767 INFO L231 Difference]: Finished difference. Result has 182 places, 232 transitions, 2711 flow [2024-06-21 16:32:24,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2420, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2711, PETRI_PLACES=182, PETRI_TRANSITIONS=232} [2024-06-21 16:32:24,768 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 140 predicate places. [2024-06-21 16:32:24,768 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 232 transitions, 2711 flow [2024-06-21 16:32:24,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:24,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:24,768 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 16:32:24,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 16:32:24,769 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:32:24,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:24,769 INFO L85 PathProgramCache]: Analyzing trace with hash 650582589, now seen corresponding path program 2 times [2024-06-21 16:32:24,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:24,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618073954] [2024-06-21 16:32:24,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:24,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:24,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:25,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:25,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:25,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618073954] [2024-06-21 16:32:25,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618073954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:25,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:25,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:32:25,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830775105] [2024-06-21 16:32:25,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:25,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:32:25,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:25,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:32:25,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:32:25,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:32:25,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 232 transitions, 2711 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:25,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:25,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:32:25,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:26,005 INFO L124 PetriNetUnfolderBase]: 2804/4228 cut-off events. [2024-06-21 16:32:26,005 INFO L125 PetriNetUnfolderBase]: For 252867/252870 co-relation queries the response was YES. [2024-06-21 16:32:26,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32556 conditions, 4228 events. 2804/4228 cut-off events. For 252867/252870 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 21264 event pairs, 779 based on Foata normal form. 4/4230 useless extension candidates. Maximal degree in co-relation 32468. Up to 4061 conditions per place. [2024-06-21 16:32:26,041 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 197 selfloop transitions, 50 changer transitions 0/250 dead transitions. [2024-06-21 16:32:26,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 250 transitions, 3425 flow [2024-06-21 16:32:26,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:32:26,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:32:26,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 16:32:26,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 16:32:26,042 INFO L175 Difference]: Start difference. First operand has 182 places, 232 transitions, 2711 flow. Second operand 7 states and 123 transitions. [2024-06-21 16:32:26,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 250 transitions, 3425 flow [2024-06-21 16:32:26,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 250 transitions, 3347 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-21 16:32:26,366 INFO L231 Difference]: Finished difference. Result has 186 places, 232 transitions, 2742 flow [2024-06-21 16:32:26,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2633, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2742, PETRI_PLACES=186, PETRI_TRANSITIONS=232} [2024-06-21 16:32:26,367 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-21 16:32:26,367 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 232 transitions, 2742 flow [2024-06-21 16:32:26,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:26,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:26,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:26,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 16:32:26,367 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:32:26,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:26,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1543552405, now seen corresponding path program 1 times [2024-06-21 16:32:26,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:26,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741446986] [2024-06-21 16:32:26,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:26,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:26,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:27,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:27,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:27,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741446986] [2024-06-21 16:32:27,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741446986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:27,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:27,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:32:27,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606840513] [2024-06-21 16:32:27,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:27,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:32:27,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:27,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:32:27,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:32:27,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 16:32:27,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 232 transitions, 2742 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:27,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:27,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 16:32:27,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:28,410 INFO L124 PetriNetUnfolderBase]: 2773/4228 cut-off events. [2024-06-21 16:32:28,410 INFO L125 PetriNetUnfolderBase]: For 273814/273817 co-relation queries the response was YES. [2024-06-21 16:32:28,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32930 conditions, 4228 events. 2773/4228 cut-off events. For 273814/273817 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 21774 event pairs, 694 based on Foata normal form. 14/4229 useless extension candidates. Maximal degree in co-relation 32841. Up to 3679 conditions per place. [2024-06-21 16:32:28,455 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 207 selfloop transitions, 41 changer transitions 0/270 dead transitions. [2024-06-21 16:32:28,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 270 transitions, 3366 flow [2024-06-21 16:32:28,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:32:28,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:32:28,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 16:32:28,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-21 16:32:28,456 INFO L175 Difference]: Start difference. First operand has 186 places, 232 transitions, 2742 flow. Second operand 9 states and 168 transitions. [2024-06-21 16:32:28,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 270 transitions, 3366 flow [2024-06-21 16:32:28,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 270 transitions, 3279 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 16:32:28,691 INFO L231 Difference]: Finished difference. Result has 191 places, 233 transitions, 2773 flow [2024-06-21 16:32:28,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2655, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2773, PETRI_PLACES=191, PETRI_TRANSITIONS=233} [2024-06-21 16:32:28,691 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 149 predicate places. [2024-06-21 16:32:28,691 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 233 transitions, 2773 flow [2024-06-21 16:32:28,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:28,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:28,693 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 16:32:28,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 16:32:28,696 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:32:28,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:28,696 INFO L85 PathProgramCache]: Analyzing trace with hash 650590122, now seen corresponding path program 2 times [2024-06-21 16:32:28,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:28,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676780494] [2024-06-21 16:32:28,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:28,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:28,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:29,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:29,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:29,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676780494] [2024-06-21 16:32:29,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676780494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:29,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:29,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:32:29,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780917995] [2024-06-21 16:32:29,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:29,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:32:29,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:29,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:32:29,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:32:29,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:32:29,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 233 transitions, 2773 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:32:29,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:29,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:32:29,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:30,076 INFO L124 PetriNetUnfolderBase]: 2977/4482 cut-off events. [2024-06-21 16:32:30,076 INFO L125 PetriNetUnfolderBase]: For 292260/292263 co-relation queries the response was YES. [2024-06-21 16:32:30,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35093 conditions, 4482 events. 2977/4482 cut-off events. For 292260/292263 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 22817 event pairs, 820 based on Foata normal form. 8/4488 useless extension candidates. Maximal degree in co-relation 35003. Up to 4026 conditions per place. [2024-06-21 16:32:30,112 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 196 selfloop transitions, 72 changer transitions 0/271 dead transitions. [2024-06-21 16:32:30,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 271 transitions, 3813 flow [2024-06-21 16:32:30,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:32:30,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:32:30,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 16:32:30,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-21 16:32:30,114 INFO L175 Difference]: Start difference. First operand has 191 places, 233 transitions, 2773 flow. Second operand 8 states and 146 transitions. [2024-06-21 16:32:30,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 271 transitions, 3813 flow [2024-06-21 16:32:30,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 271 transitions, 3711 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 16:32:30,363 INFO L231 Difference]: Finished difference. Result has 193 places, 244 transitions, 2979 flow [2024-06-21 16:32:30,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2671, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2979, PETRI_PLACES=193, PETRI_TRANSITIONS=244} [2024-06-21 16:32:30,364 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 151 predicate places. [2024-06-21 16:32:30,364 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 244 transitions, 2979 flow [2024-06-21 16:32:30,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:32:30,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:30,365 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 16:32:30,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 16:32:30,365 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:32:30,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:30,365 INFO L85 PathProgramCache]: Analyzing trace with hash 650578962, now seen corresponding path program 3 times [2024-06-21 16:32:30,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:30,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136138255] [2024-06-21 16:32:30,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:30,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:30,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:30,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:30,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:30,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136138255] [2024-06-21 16:32:30,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136138255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:30,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:30,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:32:30,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44386261] [2024-06-21 16:32:30,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:30,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:32:30,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:30,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:32:30,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:32:31,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:32:31,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 244 transitions, 2979 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:32:31,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:31,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:32:31,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:31,722 INFO L124 PetriNetUnfolderBase]: 2965/4467 cut-off events. [2024-06-21 16:32:31,722 INFO L125 PetriNetUnfolderBase]: For 297242/297245 co-relation queries the response was YES. [2024-06-21 16:32:31,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35145 conditions, 4467 events. 2965/4467 cut-off events. For 297242/297245 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 22749 event pairs, 809 based on Foata normal form. 8/4473 useless extension candidates. Maximal degree in co-relation 35053. Up to 4022 conditions per place. [2024-06-21 16:32:31,766 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 196 selfloop transitions, 73 changer transitions 0/272 dead transitions. [2024-06-21 16:32:31,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 272 transitions, 3808 flow [2024-06-21 16:32:31,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:32:31,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:32:31,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 16:32:31,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-21 16:32:31,767 INFO L175 Difference]: Start difference. First operand has 193 places, 244 transitions, 2979 flow. Second operand 8 states and 148 transitions. [2024-06-21 16:32:31,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 272 transitions, 3808 flow [2024-06-21 16:32:32,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 272 transitions, 3672 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-21 16:32:32,054 INFO L231 Difference]: Finished difference. Result has 197 places, 245 transitions, 3023 flow [2024-06-21 16:32:32,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2843, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3023, PETRI_PLACES=197, PETRI_TRANSITIONS=245} [2024-06-21 16:32:32,054 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 155 predicate places. [2024-06-21 16:32:32,054 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 245 transitions, 3023 flow [2024-06-21 16:32:32,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:32:32,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:32,055 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 16:32:32,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 16:32:32,055 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:32:32,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:32,055 INFO L85 PathProgramCache]: Analyzing trace with hash 650578621, now seen corresponding path program 2 times [2024-06-21 16:32:32,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:32,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928388277] [2024-06-21 16:32:32,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:32,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:32,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:32,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:32,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:32,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928388277] [2024-06-21 16:32:32,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928388277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:32,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:32,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:32:32,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065896927] [2024-06-21 16:32:32,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:32,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:32:32,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:32,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:32:32,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:32:32,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:32:32,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 245 transitions, 3023 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:32:32,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:32,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:32:32,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:33,636 INFO L124 PetriNetUnfolderBase]: 2977/4484 cut-off events. [2024-06-21 16:32:33,637 INFO L125 PetriNetUnfolderBase]: For 304495/304498 co-relation queries the response was YES. [2024-06-21 16:32:33,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35363 conditions, 4484 events. 2977/4484 cut-off events. For 304495/304498 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 22914 event pairs, 815 based on Foata normal form. 4/4486 useless extension candidates. Maximal degree in co-relation 35270. Up to 4310 conditions per place. [2024-06-21 16:32:33,685 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 210 selfloop transitions, 55 changer transitions 0/268 dead transitions. [2024-06-21 16:32:33,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 268 transitions, 3833 flow [2024-06-21 16:32:33,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:32:33,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:32:33,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 16:32:33,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 16:32:33,686 INFO L175 Difference]: Start difference. First operand has 197 places, 245 transitions, 3023 flow. Second operand 8 states and 136 transitions. [2024-06-21 16:32:33,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 268 transitions, 3833 flow [2024-06-21 16:32:34,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 268 transitions, 3689 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 16:32:34,088 INFO L231 Difference]: Finished difference. Result has 200 places, 249 transitions, 3046 flow [2024-06-21 16:32:34,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2879, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3046, PETRI_PLACES=200, PETRI_TRANSITIONS=249} [2024-06-21 16:32:34,088 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 158 predicate places. [2024-06-21 16:32:34,088 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 249 transitions, 3046 flow [2024-06-21 16:32:34,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:32:34,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:34,094 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 16:32:34,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 16:32:34,094 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:32:34,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:34,094 INFO L85 PathProgramCache]: Analyzing trace with hash 583926077, now seen corresponding path program 3 times [2024-06-21 16:32:34,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:34,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073269226] [2024-06-21 16:32:34,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:34,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:34,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:34,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:34,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:34,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073269226] [2024-06-21 16:32:34,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073269226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:34,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:34,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:32:34,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902401523] [2024-06-21 16:32:34,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:34,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:32:34,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:34,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:32:34,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:32:34,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:32:34,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 249 transitions, 3046 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:34,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:34,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:32:34,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:35,438 INFO L124 PetriNetUnfolderBase]: 2964/4464 cut-off events. [2024-06-21 16:32:35,438 INFO L125 PetriNetUnfolderBase]: For 312524/312524 co-relation queries the response was YES. [2024-06-21 16:32:35,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35202 conditions, 4464 events. 2964/4464 cut-off events. For 312524/312524 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 22737 event pairs, 804 based on Foata normal form. 1/4464 useless extension candidates. Maximal degree in co-relation 35108. Up to 4416 conditions per place. [2024-06-21 16:32:35,482 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 239 selfloop transitions, 24 changer transitions 0/266 dead transitions. [2024-06-21 16:32:35,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 266 transitions, 3712 flow [2024-06-21 16:32:35,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:32:35,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:32:35,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 16:32:35,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-21 16:32:35,483 INFO L175 Difference]: Start difference. First operand has 200 places, 249 transitions, 3046 flow. Second operand 7 states and 117 transitions. [2024-06-21 16:32:35,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 266 transitions, 3712 flow [2024-06-21 16:32:35,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 266 transitions, 3565 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 16:32:35,943 INFO L231 Difference]: Finished difference. Result has 201 places, 249 transitions, 2953 flow [2024-06-21 16:32:35,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2899, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2953, PETRI_PLACES=201, PETRI_TRANSITIONS=249} [2024-06-21 16:32:35,943 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2024-06-21 16:32:35,943 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 249 transitions, 2953 flow [2024-06-21 16:32:35,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:35,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:35,944 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 16:32:35,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 16:32:35,944 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:32:35,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:35,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1428957623, now seen corresponding path program 4 times [2024-06-21 16:32:35,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:35,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343952177] [2024-06-21 16:32:35,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:35,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:35,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:36,408 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 16:32:36,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:36,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343952177] [2024-06-21 16:32:36,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343952177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:36,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:36,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:32:36,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777096702] [2024-06-21 16:32:36,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:36,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:32:36,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:36,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:32:36,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:32:36,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:32:36,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 249 transitions, 2953 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:36,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:36,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:32:36,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:37,299 INFO L124 PetriNetUnfolderBase]: 2969/4471 cut-off events. [2024-06-21 16:32:37,300 INFO L125 PetriNetUnfolderBase]: For 322404/322404 co-relation queries the response was YES. [2024-06-21 16:32:37,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35304 conditions, 4471 events. 2969/4471 cut-off events. For 322404/322404 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 22766 event pairs, 820 based on Foata normal form. 1/4471 useless extension candidates. Maximal degree in co-relation 35209. Up to 4438 conditions per place. [2024-06-21 16:32:37,342 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 243 selfloop transitions, 19 changer transitions 0/265 dead transitions. [2024-06-21 16:32:37,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 265 transitions, 3569 flow [2024-06-21 16:32:37,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:32:37,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:32:37,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-21 16:32:37,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-21 16:32:37,343 INFO L175 Difference]: Start difference. First operand has 201 places, 249 transitions, 2953 flow. Second operand 7 states and 112 transitions. [2024-06-21 16:32:37,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 265 transitions, 3569 flow [2024-06-21 16:32:37,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 265 transitions, 3377 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-21 16:32:37,806 INFO L231 Difference]: Finished difference. Result has 199 places, 252 transitions, 2871 flow [2024-06-21 16:32:37,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2775, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2871, PETRI_PLACES=199, PETRI_TRANSITIONS=252} [2024-06-21 16:32:37,807 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 157 predicate places. [2024-06-21 16:32:37,807 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 252 transitions, 2871 flow [2024-06-21 16:32:37,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:37,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:37,807 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 16:32:37,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 16:32:37,808 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:32:37,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:37,808 INFO L85 PathProgramCache]: Analyzing trace with hash 496396967, now seen corresponding path program 2 times [2024-06-21 16:32:37,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:37,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468175361] [2024-06-21 16:32:37,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:37,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:37,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:38,721 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 16:32:38,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:38,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468175361] [2024-06-21 16:32:38,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468175361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:38,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:38,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:32:38,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710667149] [2024-06-21 16:32:38,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:38,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:32:38,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:38,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:32:38,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:32:38,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 16:32:38,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 252 transitions, 2871 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:38,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:38,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 16:32:38,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:39,634 INFO L124 PetriNetUnfolderBase]: 2876/4368 cut-off events. [2024-06-21 16:32:39,634 INFO L125 PetriNetUnfolderBase]: For 337093/337096 co-relation queries the response was YES. [2024-06-21 16:32:39,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34572 conditions, 4368 events. 2876/4368 cut-off events. For 337093/337096 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 22459 event pairs, 683 based on Foata normal form. 14/4369 useless extension candidates. Maximal degree in co-relation 34477. Up to 3687 conditions per place. [2024-06-21 16:32:39,673 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 215 selfloop transitions, 45 changer transitions 0/284 dead transitions. [2024-06-21 16:32:39,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 284 transitions, 3477 flow [2024-06-21 16:32:39,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:32:39,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:32:39,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 16:32:39,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-21 16:32:39,674 INFO L175 Difference]: Start difference. First operand has 199 places, 252 transitions, 2871 flow. Second operand 8 states and 150 transitions. [2024-06-21 16:32:39,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 284 transitions, 3477 flow [2024-06-21 16:32:40,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 284 transitions, 3423 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 16:32:40,295 INFO L231 Difference]: Finished difference. Result has 202 places, 252 transitions, 2915 flow [2024-06-21 16:32:40,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2817, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2915, PETRI_PLACES=202, PETRI_TRANSITIONS=252} [2024-06-21 16:32:40,296 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 160 predicate places. [2024-06-21 16:32:40,296 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 252 transitions, 2915 flow [2024-06-21 16:32:40,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:40,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:40,297 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 16:32:40,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 16:32:40,297 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:32:40,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:40,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1767147893, now seen corresponding path program 3 times [2024-06-21 16:32:40,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:40,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79079947] [2024-06-21 16:32:40,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:40,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:40,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:41,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:41,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:41,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79079947] [2024-06-21 16:32:41,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79079947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:41,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:41,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:32:41,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996105716] [2024-06-21 16:32:41,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:41,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:32:41,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:41,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:32:41,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:32:41,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 16:32:41,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 252 transitions, 2915 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:41,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:41,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 16:32:41,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:42,243 INFO L124 PetriNetUnfolderBase]: 2909/4431 cut-off events. [2024-06-21 16:32:42,243 INFO L125 PetriNetUnfolderBase]: For 348339/348342 co-relation queries the response was YES. [2024-06-21 16:32:42,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35209 conditions, 4431 events. 2909/4431 cut-off events. For 348339/348342 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 22979 event pairs, 752 based on Foata normal form. 12/4440 useless extension candidates. Maximal degree in co-relation 35113. Up to 4110 conditions per place. [2024-06-21 16:32:42,289 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 240 selfloop transitions, 18 changer transitions 0/282 dead transitions. [2024-06-21 16:32:42,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 282 transitions, 3533 flow [2024-06-21 16:32:42,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:32:42,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:32:42,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 16:32:42,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-21 16:32:42,291 INFO L175 Difference]: Start difference. First operand has 202 places, 252 transitions, 2915 flow. Second operand 8 states and 143 transitions. [2024-06-21 16:32:42,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 282 transitions, 3533 flow [2024-06-21 16:32:42,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 282 transitions, 3402 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 16:32:42,588 INFO L231 Difference]: Finished difference. Result has 203 places, 253 transitions, 2854 flow [2024-06-21 16:32:42,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2784, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2854, PETRI_PLACES=203, PETRI_TRANSITIONS=253} [2024-06-21 16:32:42,589 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 161 predicate places. [2024-06-21 16:32:42,589 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 253 transitions, 2854 flow [2024-06-21 16:32:42,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:42,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:42,590 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 16:32:42,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 16:32:42,590 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:32:42,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:42,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1482048023, now seen corresponding path program 4 times [2024-06-21 16:32:42,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:42,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442372456] [2024-06-21 16:32:42,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:42,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:42,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:43,715 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 16:32:43,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:43,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442372456] [2024-06-21 16:32:43,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442372456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:43,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:43,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:32:43,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593702722] [2024-06-21 16:32:43,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:43,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:32:43,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:43,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:32:43,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:32:43,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 16:32:43,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 253 transitions, 2854 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:43,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:43,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 16:32:43,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:44,653 INFO L124 PetriNetUnfolderBase]: 2958/4510 cut-off events. [2024-06-21 16:32:44,653 INFO L125 PetriNetUnfolderBase]: For 350497/350500 co-relation queries the response was YES. [2024-06-21 16:32:44,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35359 conditions, 4510 events. 2958/4510 cut-off events. For 350497/350500 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 23613 event pairs, 692 based on Foata normal form. 12/4509 useless extension candidates. Maximal degree in co-relation 35262. Up to 3674 conditions per place. [2024-06-21 16:32:44,699 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 203 selfloop transitions, 59 changer transitions 0/286 dead transitions. [2024-06-21 16:32:44,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 286 transitions, 3492 flow [2024-06-21 16:32:44,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:32:44,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:32:44,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 16:32:44,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-06-21 16:32:44,701 INFO L175 Difference]: Start difference. First operand has 203 places, 253 transitions, 2854 flow. Second operand 8 states and 151 transitions. [2024-06-21 16:32:44,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 286 transitions, 3492 flow [2024-06-21 16:32:45,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 286 transitions, 3411 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-21 16:32:45,239 INFO L231 Difference]: Finished difference. Result has 204 places, 254 transitions, 2931 flow [2024-06-21 16:32:45,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2773, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2931, PETRI_PLACES=204, PETRI_TRANSITIONS=254} [2024-06-21 16:32:45,240 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 162 predicate places. [2024-06-21 16:32:45,240 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 254 transitions, 2931 flow [2024-06-21 16:32:45,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:45,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:45,240 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 16:32:45,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 16:32:45,241 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:32:45,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:45,241 INFO L85 PathProgramCache]: Analyzing trace with hash -655530085, now seen corresponding path program 5 times [2024-06-21 16:32:45,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:45,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979312420] [2024-06-21 16:32:45,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:45,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:45,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:46,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:46,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:46,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979312420] [2024-06-21 16:32:46,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979312420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:46,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:46,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:32:46,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054905197] [2024-06-21 16:32:46,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:46,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:32:46,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:46,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:32:46,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:32:46,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 16:32:46,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 254 transitions, 2931 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:46,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:46,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 16:32:46,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:47,103 INFO L124 PetriNetUnfolderBase]: 3024/4632 cut-off events. [2024-06-21 16:32:47,103 INFO L125 PetriNetUnfolderBase]: For 336445/336448 co-relation queries the response was YES. [2024-06-21 16:32:47,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35432 conditions, 4632 events. 3024/4632 cut-off events. For 336445/336448 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 24492 event pairs, 658 based on Foata normal form. 16/4645 useless extension candidates. Maximal degree in co-relation 35335. Up to 3881 conditions per place. [2024-06-21 16:32:47,146 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 219 selfloop transitions, 55 changer transitions 0/298 dead transitions. [2024-06-21 16:32:47,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 298 transitions, 3665 flow [2024-06-21 16:32:47,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:32:47,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:32:47,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-21 16:32:47,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5060975609756098 [2024-06-21 16:32:47,148 INFO L175 Difference]: Start difference. First operand has 204 places, 254 transitions, 2931 flow. Second operand 8 states and 166 transitions. [2024-06-21 16:32:47,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 298 transitions, 3665 flow [2024-06-21 16:32:47,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 298 transitions, 3523 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 16:32:47,735 INFO L231 Difference]: Finished difference. Result has 205 places, 256 transitions, 2958 flow [2024-06-21 16:32:47,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2789, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2958, PETRI_PLACES=205, PETRI_TRANSITIONS=256} [2024-06-21 16:32:47,735 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 163 predicate places. [2024-06-21 16:32:47,735 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 256 transitions, 2958 flow [2024-06-21 16:32:47,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:47,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:47,736 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 16:32:47,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 16:32:47,736 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:32:47,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:47,736 INFO L85 PathProgramCache]: Analyzing trace with hash -655523575, now seen corresponding path program 6 times [2024-06-21 16:32:47,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:47,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502745081] [2024-06-21 16:32:47,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:47,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:47,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:48,785 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 16:32:48,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:48,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502745081] [2024-06-21 16:32:48,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502745081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:48,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:48,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:32:48,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714452435] [2024-06-21 16:32:48,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:48,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:32:48,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:48,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:32:48,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:32:48,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 16:32:48,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 256 transitions, 2958 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:48,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:48,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 16:32:48,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:49,717 INFO L124 PetriNetUnfolderBase]: 3004/4600 cut-off events. [2024-06-21 16:32:49,717 INFO L125 PetriNetUnfolderBase]: For 323014/323017 co-relation queries the response was YES. [2024-06-21 16:32:49,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34749 conditions, 4600 events. 3004/4600 cut-off events. For 323014/323017 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 24353 event pairs, 735 based on Foata normal form. 12/4609 useless extension candidates. Maximal degree in co-relation 34652. Up to 3988 conditions per place. [2024-06-21 16:32:49,763 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 215 selfloop transitions, 51 changer transitions 0/290 dead transitions. [2024-06-21 16:32:49,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 290 transitions, 3536 flow [2024-06-21 16:32:49,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:32:49,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:32:49,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 16:32:49,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725609756097561 [2024-06-21 16:32:49,765 INFO L175 Difference]: Start difference. First operand has 205 places, 256 transitions, 2958 flow. Second operand 8 states and 155 transitions. [2024-06-21 16:32:49,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 290 transitions, 3536 flow [2024-06-21 16:32:50,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 290 transitions, 3412 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 16:32:50,135 INFO L231 Difference]: Finished difference. Result has 206 places, 255 transitions, 2893 flow [2024-06-21 16:32:50,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2784, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2893, PETRI_PLACES=206, PETRI_TRANSITIONS=255} [2024-06-21 16:32:50,135 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 164 predicate places. [2024-06-21 16:32:50,135 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 255 transitions, 2893 flow [2024-06-21 16:32:50,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:50,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:50,136 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 16:32:50,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 16:32:50,136 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:32:50,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:50,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1996296863, now seen corresponding path program 5 times [2024-06-21 16:32:50,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:50,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442272931] [2024-06-21 16:32:50,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:50,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:50,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:50,647 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 16:32:50,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:50,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442272931] [2024-06-21 16:32:50,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442272931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:50,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:50,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:32:50,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645760870] [2024-06-21 16:32:50,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:50,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:32:50,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:50,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:32:50,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:32:50,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:32:50,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 255 transitions, 2893 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:50,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:50,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:32:50,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:51,501 INFO L124 PetriNetUnfolderBase]: 3082/4676 cut-off events. [2024-06-21 16:32:51,501 INFO L125 PetriNetUnfolderBase]: For 321160/321163 co-relation queries the response was YES. [2024-06-21 16:32:51,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35037 conditions, 4676 events. 3082/4676 cut-off events. For 321160/321163 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 24478 event pairs, 843 based on Foata normal form. 3/4677 useless extension candidates. Maximal degree in co-relation 34939. Up to 4642 conditions per place. [2024-06-21 16:32:51,541 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 243 selfloop transitions, 19 changer transitions 0/265 dead transitions. [2024-06-21 16:32:51,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 265 transitions, 3441 flow [2024-06-21 16:32:51,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:32:51,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:32:51,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-21 16:32:51,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37630662020905925 [2024-06-21 16:32:51,543 INFO L175 Difference]: Start difference. First operand has 206 places, 255 transitions, 2893 flow. Second operand 7 states and 108 transitions. [2024-06-21 16:32:51,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 265 transitions, 3441 flow [2024-06-21 16:32:51,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 265 transitions, 3278 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-21 16:32:51,978 INFO L231 Difference]: Finished difference. Result has 206 places, 255 transitions, 2774 flow [2024-06-21 16:32:51,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2730, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2774, PETRI_PLACES=206, PETRI_TRANSITIONS=255} [2024-06-21 16:32:51,979 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 164 predicate places. [2024-06-21 16:32:51,979 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 255 transitions, 2774 flow [2024-06-21 16:32:51,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:51,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:51,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:51,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 16:32:51,979 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:32:51,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:51,982 INFO L85 PathProgramCache]: Analyzing trace with hash 966069279, now seen corresponding path program 6 times [2024-06-21 16:32:51,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:51,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937680377] [2024-06-21 16:32:51,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:51,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:51,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:52,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:52,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:52,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937680377] [2024-06-21 16:32:52,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937680377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:52,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:52,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:32:52,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868886315] [2024-06-21 16:32:52,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:52,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:32:52,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:52,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:32:52,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:32:52,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:32:52,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 255 transitions, 2774 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:52,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:52,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:32:52,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:53,252 INFO L124 PetriNetUnfolderBase]: 3074/4665 cut-off events. [2024-06-21 16:32:53,252 INFO L125 PetriNetUnfolderBase]: For 329569/329572 co-relation queries the response was YES. [2024-06-21 16:32:53,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34563 conditions, 4665 events. 3074/4665 cut-off events. For 329569/329572 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 24393 event pairs, 836 based on Foata normal form. 4/4667 useless extension candidates. Maximal degree in co-relation 34465. Up to 4609 conditions per place. [2024-06-21 16:32:53,297 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 233 selfloop transitions, 29 changer transitions 0/265 dead transitions. [2024-06-21 16:32:53,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 265 transitions, 3322 flow [2024-06-21 16:32:53,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:32:53,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:32:53,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-21 16:32:53,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3867595818815331 [2024-06-21 16:32:53,298 INFO L175 Difference]: Start difference. First operand has 206 places, 255 transitions, 2774 flow. Second operand 7 states and 111 transitions. [2024-06-21 16:32:53,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 265 transitions, 3322 flow [2024-06-21 16:32:53,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 265 transitions, 3270 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 16:32:53,875 INFO L231 Difference]: Finished difference. Result has 208 places, 255 transitions, 2788 flow [2024-06-21 16:32:53,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2722, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2788, PETRI_PLACES=208, PETRI_TRANSITIONS=255} [2024-06-21 16:32:53,876 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 166 predicate places. [2024-06-21 16:32:53,876 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 255 transitions, 2788 flow [2024-06-21 16:32:53,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:53,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:53,876 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 16:32:53,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 16:32:53,876 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:32:53,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:53,877 INFO L85 PathProgramCache]: Analyzing trace with hash 590754162, now seen corresponding path program 4 times [2024-06-21 16:32:53,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:53,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374233001] [2024-06-21 16:32:53,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:53,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:53,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:54,449 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 16:32:54,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:54,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374233001] [2024-06-21 16:32:54,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374233001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:54,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:54,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:32:54,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794056023] [2024-06-21 16:32:54,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:54,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:32:54,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:54,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:32:54,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:32:54,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:32:54,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 255 transitions, 2788 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:32:54,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:54,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:32:54,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:55,297 INFO L124 PetriNetUnfolderBase]: 3206/4848 cut-off events. [2024-06-21 16:32:55,297 INFO L125 PetriNetUnfolderBase]: For 365867/365870 co-relation queries the response was YES. [2024-06-21 16:32:55,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36548 conditions, 4848 events. 3206/4848 cut-off events. For 365867/365870 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 25454 event pairs, 855 based on Foata normal form. 8/4854 useless extension candidates. Maximal degree in co-relation 36449. Up to 4566 conditions per place. [2024-06-21 16:32:55,343 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 231 selfloop transitions, 52 changer transitions 0/286 dead transitions. [2024-06-21 16:32:55,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 286 transitions, 3797 flow [2024-06-21 16:32:55,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:32:55,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:32:55,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 16:32:55,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-21 16:32:55,345 INFO L175 Difference]: Start difference. First operand has 208 places, 255 transitions, 2788 flow. Second operand 8 states and 135 transitions. [2024-06-21 16:32:55,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 286 transitions, 3797 flow [2024-06-21 16:32:56,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 286 transitions, 3729 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 16:32:56,046 INFO L231 Difference]: Finished difference. Result has 211 places, 266 transitions, 2997 flow [2024-06-21 16:32:56,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2720, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2997, PETRI_PLACES=211, PETRI_TRANSITIONS=266} [2024-06-21 16:32:56,046 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 169 predicate places. [2024-06-21 16:32:56,046 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 266 transitions, 2997 flow [2024-06-21 16:32:56,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:32:56,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:56,047 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 16:32:56,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 16:32:56,047 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:32:56,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:56,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1125222461, now seen corresponding path program 3 times [2024-06-21 16:32:56,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:56,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122064206] [2024-06-21 16:32:56,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:56,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:56,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:56,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:56,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:56,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122064206] [2024-06-21 16:32:56,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122064206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:56,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:56,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:32:56,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65703557] [2024-06-21 16:32:56,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:56,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:32:56,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:56,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:32:56,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:32:56,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:32:56,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 266 transitions, 2997 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:32:56,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:56,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:32:56,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:57,539 INFO L124 PetriNetUnfolderBase]: 3200/4840 cut-off events. [2024-06-21 16:32:57,540 INFO L125 PetriNetUnfolderBase]: For 369300/369303 co-relation queries the response was YES. [2024-06-21 16:32:57,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36957 conditions, 4840 events. 3200/4840 cut-off events. For 369300/369303 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 25359 event pairs, 868 based on Foata normal form. 4/4842 useless extension candidates. Maximal degree in co-relation 36856. Up to 4778 conditions per place. [2024-06-21 16:32:57,587 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 240 selfloop transitions, 35 changer transitions 0/278 dead transitions. [2024-06-21 16:32:57,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 278 transitions, 3580 flow [2024-06-21 16:32:57,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:32:57,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:32:57,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-21 16:32:57,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-21 16:32:57,589 INFO L175 Difference]: Start difference. First operand has 211 places, 266 transitions, 2997 flow. Second operand 8 states and 124 transitions. [2024-06-21 16:32:57,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 278 transitions, 3580 flow [2024-06-21 16:32:57,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 278 transitions, 3397 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-21 16:32:57,970 INFO L231 Difference]: Finished difference. Result has 214 places, 267 transitions, 2900 flow [2024-06-21 16:32:57,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2814, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2900, PETRI_PLACES=214, PETRI_TRANSITIONS=267} [2024-06-21 16:32:57,970 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 172 predicate places. [2024-06-21 16:32:57,970 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 267 transitions, 2900 flow [2024-06-21 16:32:57,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:32:57,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:57,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:57,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 16:32:57,971 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:32:57,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:57,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1252168686, now seen corresponding path program 5 times [2024-06-21 16:32:57,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:57,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500895430] [2024-06-21 16:32:57,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:57,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:57,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:58,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:58,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:58,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500895430] [2024-06-21 16:32:58,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500895430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:58,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:58,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:32:58,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679967591] [2024-06-21 16:32:58,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:58,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:32:58,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:58,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:32:58,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:32:58,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:32:58,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 267 transitions, 2900 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:32:58,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:58,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:32:58,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:59,512 INFO L124 PetriNetUnfolderBase]: 3182/4816 cut-off events. [2024-06-21 16:32:59,513 INFO L125 PetriNetUnfolderBase]: For 378723/378726 co-relation queries the response was YES. [2024-06-21 16:32:59,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36225 conditions, 4816 events. 3182/4816 cut-off events. For 378723/378726 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 25282 event pairs, 833 based on Foata normal form. 8/4822 useless extension candidates. Maximal degree in co-relation 36124. Up to 4547 conditions per place. [2024-06-21 16:32:59,553 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 227 selfloop transitions, 57 changer transitions 0/287 dead transitions. [2024-06-21 16:32:59,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 287 transitions, 3775 flow [2024-06-21 16:32:59,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:32:59,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:32:59,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 16:32:59,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-21 16:32:59,554 INFO L175 Difference]: Start difference. First operand has 214 places, 267 transitions, 2900 flow. Second operand 8 states and 135 transitions. [2024-06-21 16:32:59,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 287 transitions, 3775 flow [2024-06-21 16:33:00,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 287 transitions, 3698 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 16:33:00,174 INFO L231 Difference]: Finished difference. Result has 216 places, 268 transitions, 2973 flow [2024-06-21 16:33:00,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2823, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2973, PETRI_PLACES=216, PETRI_TRANSITIONS=268} [2024-06-21 16:33:00,174 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 174 predicate places. [2024-06-21 16:33:00,174 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 268 transitions, 2973 flow [2024-06-21 16:33:00,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:33:00,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:00,175 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 16:33:00,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 16:33:00,175 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:33:00,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:00,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1124836170, now seen corresponding path program 6 times [2024-06-21 16:33:00,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:00,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430379449] [2024-06-21 16:33:00,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:00,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:00,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:00,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:00,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:00,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430379449] [2024-06-21 16:33:00,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430379449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:00,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:00,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:33:00,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527418305] [2024-06-21 16:33:00,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:00,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:33:00,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:00,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:33:00,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:33:00,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:33:00,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 268 transitions, 2973 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:33:00,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:00,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:33:00,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:01,539 INFO L124 PetriNetUnfolderBase]: 3170/4801 cut-off events. [2024-06-21 16:33:01,539 INFO L125 PetriNetUnfolderBase]: For 382311/382314 co-relation queries the response was YES. [2024-06-21 16:33:01,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36229 conditions, 4801 events. 3170/4801 cut-off events. For 382311/382314 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 25179 event pairs, 839 based on Foata normal form. 8/4807 useless extension candidates. Maximal degree in co-relation 36127. Up to 4676 conditions per place. [2024-06-21 16:33:01,588 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 247 selfloop transitions, 34 changer transitions 0/284 dead transitions. [2024-06-21 16:33:01,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 284 transitions, 3693 flow [2024-06-21 16:33:01,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:33:01,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:33:01,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 16:33:01,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-21 16:33:01,589 INFO L175 Difference]: Start difference. First operand has 216 places, 268 transitions, 2973 flow. Second operand 8 states and 129 transitions. [2024-06-21 16:33:01,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 284 transitions, 3693 flow [2024-06-21 16:33:02,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 284 transitions, 3509 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 16:33:02,346 INFO L231 Difference]: Finished difference. Result has 218 places, 268 transitions, 2865 flow [2024-06-21 16:33:02,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2789, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2865, PETRI_PLACES=218, PETRI_TRANSITIONS=268} [2024-06-21 16:33:02,347 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 176 predicate places. [2024-06-21 16:33:02,347 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 268 transitions, 2865 flow [2024-06-21 16:33:02,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:33:02,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:02,348 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 16:33:02,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 16:33:02,348 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:33:02,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:02,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1239257093, now seen corresponding path program 1 times [2024-06-21 16:33:02,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:02,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487685856] [2024-06-21 16:33:02,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:02,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:02,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:03,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:03,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:03,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487685856] [2024-06-21 16:33:03,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487685856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:03,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:03,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:33:03,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243749314] [2024-06-21 16:33:03,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:03,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:33:03,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:03,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:33:03,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:33:03,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:33:03,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 268 transitions, 2865 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:33:03,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:03,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:33:03,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:04,058 INFO L124 PetriNetUnfolderBase]: 3172/4803 cut-off events. [2024-06-21 16:33:04,058 INFO L125 PetriNetUnfolderBase]: For 385284/385284 co-relation queries the response was YES. [2024-06-21 16:33:04,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36018 conditions, 4803 events. 3172/4803 cut-off events. For 385284/385284 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 25087 event pairs, 840 based on Foata normal form. 2/4804 useless extension candidates. Maximal degree in co-relation 35916. Up to 4776 conditions per place. [2024-06-21 16:33:04,110 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 266 selfloop transitions, 17 changer transitions 0/286 dead transitions. [2024-06-21 16:33:04,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 286 transitions, 3534 flow [2024-06-21 16:33:04,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:33:04,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:33:04,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-21 16:33:04,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3628048780487805 [2024-06-21 16:33:04,111 INFO L175 Difference]: Start difference. First operand has 218 places, 268 transitions, 2865 flow. Second operand 8 states and 119 transitions. [2024-06-21 16:33:04,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 286 transitions, 3534 flow [2024-06-21 16:33:04,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 286 transitions, 3389 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 16:33:04,770 INFO L231 Difference]: Finished difference. Result has 219 places, 274 transitions, 2851 flow [2024-06-21 16:33:04,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2720, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2851, PETRI_PLACES=219, PETRI_TRANSITIONS=274} [2024-06-21 16:33:04,770 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 177 predicate places. [2024-06-21 16:33:04,770 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 274 transitions, 2851 flow [2024-06-21 16:33:04,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:33:04,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:04,771 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 16:33:04,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 16:33:04,771 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:33:04,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:04,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1432668602, now seen corresponding path program 1 times [2024-06-21 16:33:04,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:04,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901038294] [2024-06-21 16:33:04,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:04,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:04,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:05,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:05,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:05,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901038294] [2024-06-21 16:33:05,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901038294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:05,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:05,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:33:05,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123355061] [2024-06-21 16:33:05,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:05,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:33:05,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:05,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:33:05,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:33:05,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:33:05,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 274 transitions, 2851 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:33:05,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:05,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:33:05,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:06,422 INFO L124 PetriNetUnfolderBase]: 3202/4845 cut-off events. [2024-06-21 16:33:06,422 INFO L125 PetriNetUnfolderBase]: For 404320/404320 co-relation queries the response was YES. [2024-06-21 16:33:06,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36581 conditions, 4845 events. 3202/4845 cut-off events. For 404320/404320 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 25371 event pairs, 847 based on Foata normal form. 6/4850 useless extension candidates. Maximal degree in co-relation 36478. Up to 4774 conditions per place. [2024-06-21 16:33:06,468 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 276 selfloop transitions, 19 changer transitions 0/298 dead transitions. [2024-06-21 16:33:06,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 298 transitions, 3545 flow [2024-06-21 16:33:06,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:33:06,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:33:06,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 16:33:06,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-21 16:33:06,469 INFO L175 Difference]: Start difference. First operand has 219 places, 274 transitions, 2851 flow. Second operand 8 states and 129 transitions. [2024-06-21 16:33:06,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 298 transitions, 3545 flow [2024-06-21 16:33:06,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 298 transitions, 3463 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 16:33:06,856 INFO L231 Difference]: Finished difference. Result has 222 places, 277 transitions, 2863 flow [2024-06-21 16:33:06,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2769, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2863, PETRI_PLACES=222, PETRI_TRANSITIONS=277} [2024-06-21 16:33:06,856 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2024-06-21 16:33:06,856 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 277 transitions, 2863 flow [2024-06-21 16:33:06,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:33:06,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:06,857 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 16:33:06,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 16:33:06,857 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:33:06,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:06,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1852420004, now seen corresponding path program 2 times [2024-06-21 16:33:06,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:06,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851360965] [2024-06-21 16:33:06,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:06,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:06,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:07,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:07,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:07,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851360965] [2024-06-21 16:33:07,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851360965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:07,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:07,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:33:07,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552452742] [2024-06-21 16:33:07,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:07,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:33:07,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:07,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:33:07,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:33:07,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:33:07,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 277 transitions, 2863 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:33:07,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:07,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:33:07,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:08,491 INFO L124 PetriNetUnfolderBase]: 3280/4953 cut-off events. [2024-06-21 16:33:08,492 INFO L125 PetriNetUnfolderBase]: For 429721/429721 co-relation queries the response was YES. [2024-06-21 16:33:08,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38163 conditions, 4953 events. 3280/4953 cut-off events. For 429721/429721 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 25889 event pairs, 855 based on Foata normal form. 6/4958 useless extension candidates. Maximal degree in co-relation 38059. Up to 4709 conditions per place. [2024-06-21 16:33:08,546 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 256 selfloop transitions, 54 changer transitions 0/313 dead transitions. [2024-06-21 16:33:08,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 313 transitions, 3964 flow [2024-06-21 16:33:08,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:33:08,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:33:08,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 16:33:08,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-21 16:33:08,548 INFO L175 Difference]: Start difference. First operand has 222 places, 277 transitions, 2863 flow. Second operand 8 states and 142 transitions. [2024-06-21 16:33:08,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 313 transitions, 3964 flow [2024-06-21 16:33:09,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 313 transitions, 3894 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 16:33:09,475 INFO L231 Difference]: Finished difference. Result has 224 places, 286 transitions, 3064 flow [2024-06-21 16:33:09,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2793, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3064, PETRI_PLACES=224, PETRI_TRANSITIONS=286} [2024-06-21 16:33:09,488 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-21 16:33:09,491 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 286 transitions, 3064 flow [2024-06-21 16:33:09,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:33:09,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:09,491 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 16:33:09,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 16:33:09,491 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:33:09,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:09,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1428949532, now seen corresponding path program 3 times [2024-06-21 16:33:09,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:09,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571137597] [2024-06-21 16:33:09,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:09,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:09,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:10,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:10,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:10,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571137597] [2024-06-21 16:33:10,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571137597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:10,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:10,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:33:10,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294685150] [2024-06-21 16:33:10,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:10,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:33:10,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:10,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:33:10,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:33:10,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:33:10,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 286 transitions, 3064 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:33:10,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:10,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:33:10,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:11,130 INFO L124 PetriNetUnfolderBase]: 3262/4929 cut-off events. [2024-06-21 16:33:11,130 INFO L125 PetriNetUnfolderBase]: For 433996/433996 co-relation queries the response was YES. [2024-06-21 16:33:11,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38193 conditions, 4929 events. 3262/4929 cut-off events. For 433996/433996 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 25780 event pairs, 851 based on Foata normal form. 6/4934 useless extension candidates. Maximal degree in co-relation 38088. Up to 4698 conditions per place. [2024-06-21 16:33:11,183 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 258 selfloop transitions, 53 changer transitions 0/314 dead transitions. [2024-06-21 16:33:11,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 314 transitions, 3907 flow [2024-06-21 16:33:11,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:33:11,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:33:11,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 16:33:11,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 16:33:11,184 INFO L175 Difference]: Start difference. First operand has 224 places, 286 transitions, 3064 flow. Second operand 8 states and 144 transitions. [2024-06-21 16:33:11,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 314 transitions, 3907 flow [2024-06-21 16:33:12,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 314 transitions, 3808 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-21 16:33:12,074 INFO L231 Difference]: Finished difference. Result has 229 places, 286 transitions, 3077 flow [2024-06-21 16:33:12,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2965, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3077, PETRI_PLACES=229, PETRI_TRANSITIONS=286} [2024-06-21 16:33:12,074 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 187 predicate places. [2024-06-21 16:33:12,074 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 286 transitions, 3077 flow [2024-06-21 16:33:12,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:33:12,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:12,075 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 16:33:12,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 16:33:12,075 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:33:12,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:12,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1311259462, now seen corresponding path program 4 times [2024-06-21 16:33:12,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:12,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449832604] [2024-06-21 16:33:12,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:12,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:12,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:12,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:12,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:12,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449832604] [2024-06-21 16:33:12,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449832604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:12,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:12,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:33:12,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708270053] [2024-06-21 16:33:12,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:12,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:33:12,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:12,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:33:12,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:33:12,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:33:12,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 286 transitions, 3077 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:33:12,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:12,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:33:12,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:13,686 INFO L124 PetriNetUnfolderBase]: 3292/4973 cut-off events. [2024-06-21 16:33:13,686 INFO L125 PetriNetUnfolderBase]: For 447508/447511 co-relation queries the response was YES. [2024-06-21 16:33:13,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38663 conditions, 4973 events. 3292/4973 cut-off events. For 447508/447511 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 26050 event pairs, 859 based on Foata normal form. 6/4976 useless extension candidates. Maximal degree in co-relation 38556. Up to 4720 conditions per place. [2024-06-21 16:33:13,740 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 251 selfloop transitions, 58 changer transitions 0/312 dead transitions. [2024-06-21 16:33:13,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 312 transitions, 3960 flow [2024-06-21 16:33:13,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:33:13,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:33:13,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 16:33:13,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-21 16:33:13,741 INFO L175 Difference]: Start difference. First operand has 229 places, 286 transitions, 3077 flow. Second operand 8 states and 138 transitions. [2024-06-21 16:33:13,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 312 transitions, 3960 flow [2024-06-21 16:33:14,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 312 transitions, 3826 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 16:33:14,418 INFO L231 Difference]: Finished difference. Result has 230 places, 289 transitions, 3125 flow [2024-06-21 16:33:14,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2949, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3125, PETRI_PLACES=230, PETRI_TRANSITIONS=289} [2024-06-21 16:33:14,418 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-21 16:33:14,418 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 289 transitions, 3125 flow [2024-06-21 16:33:14,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:33:14,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:14,419 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 16:33:14,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 16:33:14,419 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:33:14,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:14,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1246437468, now seen corresponding path program 5 times [2024-06-21 16:33:14,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:14,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963888960] [2024-06-21 16:33:14,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:14,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:14,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:14,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:14,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:14,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963888960] [2024-06-21 16:33:14,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963888960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:14,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:14,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:33:14,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673171003] [2024-06-21 16:33:14,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:14,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:33:14,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:14,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:33:14,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:33:15,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:33:15,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 289 transitions, 3125 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:33:15,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:15,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:33:15,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:16,106 INFO L124 PetriNetUnfolderBase]: 3322/5015 cut-off events. [2024-06-21 16:33:16,106 INFO L125 PetriNetUnfolderBase]: For 461722/461725 co-relation queries the response was YES. [2024-06-21 16:33:16,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39177 conditions, 5015 events. 3322/5015 cut-off events. For 461722/461725 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 26291 event pairs, 865 based on Foata normal form. 6/5018 useless extension candidates. Maximal degree in co-relation 39069. Up to 4742 conditions per place. [2024-06-21 16:33:16,155 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 256 selfloop transitions, 59 changer transitions 0/318 dead transitions. [2024-06-21 16:33:16,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 318 transitions, 4039 flow [2024-06-21 16:33:16,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:33:16,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:33:16,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 16:33:16,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-21 16:33:16,157 INFO L175 Difference]: Start difference. First operand has 230 places, 289 transitions, 3125 flow. Second operand 8 states and 140 transitions. [2024-06-21 16:33:16,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 318 transitions, 4039 flow [2024-06-21 16:33:16,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 318 transitions, 3841 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 16:33:16,748 INFO L231 Difference]: Finished difference. Result has 232 places, 292 transitions, 3112 flow [2024-06-21 16:33:16,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2945, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3112, PETRI_PLACES=232, PETRI_TRANSITIONS=292} [2024-06-21 16:33:16,749 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-21 16:33:16,749 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 292 transitions, 3112 flow [2024-06-21 16:33:16,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:33:16,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:16,749 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 16:33:16,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 16:33:16,749 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:33:16,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:16,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1239085818, now seen corresponding path program 6 times [2024-06-21 16:33:16,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:16,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041670442] [2024-06-21 16:33:16,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:16,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:16,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:17,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:17,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:17,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041670442] [2024-06-21 16:33:17,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041670442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:17,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:17,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:33:17,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996757643] [2024-06-21 16:33:17,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:17,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:33:17,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:17,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:33:17,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:33:17,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:33:17,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 292 transitions, 3112 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:33:17,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:17,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:33:17,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:18,413 INFO L124 PetriNetUnfolderBase]: 3304/4991 cut-off events. [2024-06-21 16:33:18,414 INFO L125 PetriNetUnfolderBase]: For 461218/461221 co-relation queries the response was YES. [2024-06-21 16:33:18,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38610 conditions, 4991 events. 3304/4991 cut-off events. For 461218/461221 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 26110 event pairs, 854 based on Foata normal form. 6/4994 useless extension candidates. Maximal degree in co-relation 38501. Up to 4731 conditions per place. [2024-06-21 16:33:18,467 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 247 selfloop transitions, 62 changer transitions 0/312 dead transitions. [2024-06-21 16:33:18,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 312 transitions, 3799 flow [2024-06-21 16:33:18,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:33:18,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:33:18,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 16:33:18,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-21 16:33:18,468 INFO L175 Difference]: Start difference. First operand has 232 places, 292 transitions, 3112 flow. Second operand 8 states and 134 transitions. [2024-06-21 16:33:18,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 312 transitions, 3799 flow [2024-06-21 16:33:19,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 312 transitions, 3649 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 16:33:19,155 INFO L231 Difference]: Finished difference. Result has 235 places, 292 transitions, 3093 flow [2024-06-21 16:33:19,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2962, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3093, PETRI_PLACES=235, PETRI_TRANSITIONS=292} [2024-06-21 16:33:19,156 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-21 16:33:19,156 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 292 transitions, 3093 flow [2024-06-21 16:33:19,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:33:19,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:19,156 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 16:33:19,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 16:33:19,156 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:33:19,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:19,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1238808771, now seen corresponding path program 1 times [2024-06-21 16:33:19,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:19,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519857034] [2024-06-21 16:33:19,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:19,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:19,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:20,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:20,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:20,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519857034] [2024-06-21 16:33:20,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519857034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:20,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:20,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:33:20,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116225125] [2024-06-21 16:33:20,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:20,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:33:20,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:20,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:33:20,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:33:20,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:33:20,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 292 transitions, 3093 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:20,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:20,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:33:20,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:21,362 INFO L124 PetriNetUnfolderBase]: 3299/4982 cut-off events. [2024-06-21 16:33:21,362 INFO L125 PetriNetUnfolderBase]: For 462185/462185 co-relation queries the response was YES. [2024-06-21 16:33:21,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38449 conditions, 4982 events. 3299/4982 cut-off events. For 462185/462185 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 26081 event pairs, 859 based on Foata normal form. 2/4983 useless extension candidates. Maximal degree in co-relation 38339. Up to 4952 conditions per place. [2024-06-21 16:33:21,405 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 285 selfloop transitions, 18 changer transitions 0/306 dead transitions. [2024-06-21 16:33:21,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 306 transitions, 3779 flow [2024-06-21 16:33:21,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:33:21,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:33:21,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-21 16:33:21,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3628048780487805 [2024-06-21 16:33:21,407 INFO L175 Difference]: Start difference. First operand has 235 places, 292 transitions, 3093 flow. Second operand 8 states and 119 transitions. [2024-06-21 16:33:21,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 306 transitions, 3779 flow [2024-06-21 16:33:21,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 306 transitions, 3627 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 16:33:21,913 INFO L231 Difference]: Finished difference. Result has 235 places, 294 transitions, 3038 flow [2024-06-21 16:33:21,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2941, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3038, PETRI_PLACES=235, PETRI_TRANSITIONS=294} [2024-06-21 16:33:21,913 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-21 16:33:21,913 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 294 transitions, 3038 flow [2024-06-21 16:33:21,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:21,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:21,914 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 16:33:21,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 16:33:21,914 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:33:21,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:21,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1602355959, now seen corresponding path program 1 times [2024-06-21 16:33:21,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:21,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733003833] [2024-06-21 16:33:21,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:21,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:21,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:22,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:22,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:22,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733003833] [2024-06-21 16:33:22,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733003833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:22,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:22,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:33:22,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557914687] [2024-06-21 16:33:22,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:22,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:33:22,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:22,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:33:22,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:33:22,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:33:22,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 294 transitions, 3038 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:22,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:22,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:33:22,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:23,777 INFO L124 PetriNetUnfolderBase]: 3328/5026 cut-off events. [2024-06-21 16:33:23,778 INFO L125 PetriNetUnfolderBase]: For 484468/484471 co-relation queries the response was YES. [2024-06-21 16:33:23,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38980 conditions, 5026 events. 3328/5026 cut-off events. For 484468/484471 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 26236 event pairs, 713 based on Foata normal form. 6/5030 useless extension candidates. Maximal degree in co-relation 38869. Up to 4727 conditions per place. [2024-06-21 16:33:23,837 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 252 selfloop transitions, 82 changer transitions 0/337 dead transitions. [2024-06-21 16:33:23,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 337 transitions, 4059 flow [2024-06-21 16:33:23,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:33:23,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:33:23,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 16:33:23,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 16:33:23,839 INFO L175 Difference]: Start difference. First operand has 235 places, 294 transitions, 3038 flow. Second operand 9 states and 164 transitions. [2024-06-21 16:33:23,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 337 transitions, 4059 flow [2024-06-21 16:33:24,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 337 transitions, 3972 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 16:33:24,652 INFO L231 Difference]: Finished difference. Result has 239 places, 301 transitions, 3269 flow [2024-06-21 16:33:24,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2951, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3269, PETRI_PLACES=239, PETRI_TRANSITIONS=301} [2024-06-21 16:33:24,653 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-21 16:33:24,653 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 301 transitions, 3269 flow [2024-06-21 16:33:24,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:24,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:24,653 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 16:33:24,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 16:33:24,653 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:33:24,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:24,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1602116949, now seen corresponding path program 2 times [2024-06-21 16:33:24,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:24,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733942667] [2024-06-21 16:33:24,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:24,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:24,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:25,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:25,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:25,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733942667] [2024-06-21 16:33:25,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733942667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:25,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:25,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:33:25,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554962982] [2024-06-21 16:33:25,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:25,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:33:25,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:25,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:33:25,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:33:25,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:33:25,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 301 transitions, 3269 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:25,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:25,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:33:25,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:26,641 INFO L124 PetriNetUnfolderBase]: 3344/5050 cut-off events. [2024-06-21 16:33:26,642 INFO L125 PetriNetUnfolderBase]: For 501147/501150 co-relation queries the response was YES. [2024-06-21 16:33:26,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39936 conditions, 5050 events. 3344/5050 cut-off events. For 501147/501150 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 26505 event pairs, 867 based on Foata normal form. 6/5054 useless extension candidates. Maximal degree in co-relation 39823. Up to 4829 conditions per place. [2024-06-21 16:33:26,697 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 254 selfloop transitions, 79 changer transitions 0/336 dead transitions. [2024-06-21 16:33:26,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 336 transitions, 4084 flow [2024-06-21 16:33:26,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:33:26,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:33:26,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-21 16:33:26,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4195121951219512 [2024-06-21 16:33:26,698 INFO L175 Difference]: Start difference. First operand has 239 places, 301 transitions, 3269 flow. Second operand 10 states and 172 transitions. [2024-06-21 16:33:26,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 336 transitions, 4084 flow [2024-06-21 16:33:27,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 336 transitions, 3861 flow, removed 62 selfloop flow, removed 5 redundant places. [2024-06-21 16:33:27,500 INFO L231 Difference]: Finished difference. Result has 244 places, 304 transitions, 3285 flow [2024-06-21 16:33:27,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3078, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3285, PETRI_PLACES=244, PETRI_TRANSITIONS=304} [2024-06-21 16:33:27,500 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 202 predicate places. [2024-06-21 16:33:27,500 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 304 transitions, 3285 flow [2024-06-21 16:33:27,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:27,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:27,501 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 16:33:27,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 16:33:27,501 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:33:27,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:27,501 INFO L85 PathProgramCache]: Analyzing trace with hash -2007528131, now seen corresponding path program 1 times [2024-06-21 16:33:27,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:27,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284318894] [2024-06-21 16:33:27,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:27,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:27,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:28,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:28,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:28,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284318894] [2024-06-21 16:33:28,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284318894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:28,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:28,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:33:28,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188451246] [2024-06-21 16:33:28,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:28,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:33:28,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:28,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:33:28,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:33:28,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:33:28,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 304 transitions, 3285 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:28,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:28,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:33:28,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:29,479 INFO L124 PetriNetUnfolderBase]: 3414/5147 cut-off events. [2024-06-21 16:33:29,480 INFO L125 PetriNetUnfolderBase]: For 531351/531354 co-relation queries the response was YES. [2024-06-21 16:33:29,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40789 conditions, 5147 events. 3414/5147 cut-off events. For 531351/531354 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 27040 event pairs, 838 based on Foata normal form. 8/5153 useless extension candidates. Maximal degree in co-relation 40674. Up to 4481 conditions per place. [2024-06-21 16:33:29,537 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 231 selfloop transitions, 122 changer transitions 0/356 dead transitions. [2024-06-21 16:33:29,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 356 transitions, 4531 flow [2024-06-21 16:33:29,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:33:29,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:33:29,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 201 transitions. [2024-06-21 16:33:29,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44567627494456763 [2024-06-21 16:33:29,539 INFO L175 Difference]: Start difference. First operand has 244 places, 304 transitions, 3285 flow. Second operand 11 states and 201 transitions. [2024-06-21 16:33:29,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 356 transitions, 4531 flow [2024-06-21 16:33:30,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 356 transitions, 4355 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 16:33:30,236 INFO L231 Difference]: Finished difference. Result has 248 places, 314 transitions, 3549 flow [2024-06-21 16:33:30,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3109, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3549, PETRI_PLACES=248, PETRI_TRANSITIONS=314} [2024-06-21 16:33:30,237 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 206 predicate places. [2024-06-21 16:33:30,237 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 314 transitions, 3549 flow [2024-06-21 16:33:30,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:30,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:30,237 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 16:33:30,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 16:33:30,238 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:33:30,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:30,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1889437599, now seen corresponding path program 1 times [2024-06-21 16:33:30,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:30,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464360172] [2024-06-21 16:33:30,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:30,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:30,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:30,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:30,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:30,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464360172] [2024-06-21 16:33:30,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464360172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:30,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:30,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:33:30,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792056136] [2024-06-21 16:33:30,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:30,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:33:30,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:30,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:33:30,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:33:30,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:33:30,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 314 transitions, 3549 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:33:30,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:30,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:33:30,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:31,949 INFO L124 PetriNetUnfolderBase]: 3434/5176 cut-off events. [2024-06-21 16:33:31,949 INFO L125 PetriNetUnfolderBase]: For 544204/544207 co-relation queries the response was YES. [2024-06-21 16:33:31,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42474 conditions, 5176 events. 3434/5176 cut-off events. For 544204/544207 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 27201 event pairs, 824 based on Foata normal form. 6/5179 useless extension candidates. Maximal degree in co-relation 42357. Up to 4924 conditions per place. [2024-06-21 16:33:31,999 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 304 selfloop transitions, 37 changer transitions 0/344 dead transitions. [2024-06-21 16:33:31,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 344 transitions, 4371 flow [2024-06-21 16:33:32,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:33:32,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:33:32,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 16:33:32,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-21 16:33:32,001 INFO L175 Difference]: Start difference. First operand has 248 places, 314 transitions, 3549 flow. Second operand 8 states and 141 transitions. [2024-06-21 16:33:32,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 344 transitions, 4371 flow [2024-06-21 16:33:32,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 344 transitions, 4134 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-21 16:33:32,774 INFO L231 Difference]: Finished difference. Result has 249 places, 318 transitions, 3471 flow [2024-06-21 16:33:32,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3312, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3471, PETRI_PLACES=249, PETRI_TRANSITIONS=318} [2024-06-21 16:33:32,775 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-21 16:33:32,783 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 318 transitions, 3471 flow [2024-06-21 16:33:32,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:33:32,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:32,783 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 16:33:32,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 16:33:32,783 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:33:32,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:32,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1483906137, now seen corresponding path program 2 times [2024-06-21 16:33:32,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:32,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499836445] [2024-06-21 16:33:32,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:32,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:32,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:33,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:33,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:33,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499836445] [2024-06-21 16:33:33,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499836445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:33,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:33,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:33:33,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756065096] [2024-06-21 16:33:33,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:33,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:33:33,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:33,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:33:33,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:33:33,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:33:33,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 318 transitions, 3471 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:33:33,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:33,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:33:33,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:34,297 INFO L124 PetriNetUnfolderBase]: 3502/5270 cut-off events. [2024-06-21 16:33:34,297 INFO L125 PetriNetUnfolderBase]: For 573444/573447 co-relation queries the response was YES. [2024-06-21 16:33:34,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44051 conditions, 5270 events. 3502/5270 cut-off events. For 573444/573447 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 27722 event pairs, 829 based on Foata normal form. 6/5273 useless extension candidates. Maximal degree in co-relation 43932. Up to 4837 conditions per place. [2024-06-21 16:33:34,361 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 284 selfloop transitions, 76 changer transitions 0/363 dead transitions. [2024-06-21 16:33:34,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 363 transitions, 4824 flow [2024-06-21 16:33:34,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:33:34,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:33:34,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 16:33:34,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-21 16:33:34,363 INFO L175 Difference]: Start difference. First operand has 249 places, 318 transitions, 3471 flow. Second operand 8 states and 146 transitions. [2024-06-21 16:33:34,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 363 transitions, 4824 flow [2024-06-21 16:33:35,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 363 transitions, 4672 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-21 16:33:35,352 INFO L231 Difference]: Finished difference. Result has 253 places, 336 transitions, 3801 flow [2024-06-21 16:33:35,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3319, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3801, PETRI_PLACES=253, PETRI_TRANSITIONS=336} [2024-06-21 16:33:35,353 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 211 predicate places. [2024-06-21 16:33:35,354 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 336 transitions, 3801 flow [2024-06-21 16:33:35,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:33:35,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:35,354 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 16:33:35,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 16:33:35,354 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:33:35,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:35,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1889317443, now seen corresponding path program 1 times [2024-06-21 16:33:35,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:35,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724122584] [2024-06-21 16:33:35,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:35,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:35,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:36,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:36,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:36,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724122584] [2024-06-21 16:33:36,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724122584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:36,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:36,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:33:36,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781559672] [2024-06-21 16:33:36,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:36,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:33:36,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:36,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:33:36,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:33:36,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:33:36,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 336 transitions, 3801 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:33:36,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:36,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:33:36,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:37,064 INFO L124 PetriNetUnfolderBase]: 3604/5410 cut-off events. [2024-06-21 16:33:37,064 INFO L125 PetriNetUnfolderBase]: For 622834/622837 co-relation queries the response was YES. [2024-06-21 16:33:37,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46587 conditions, 5410 events. 3604/5410 cut-off events. For 622834/622837 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 28515 event pairs, 855 based on Foata normal form. 8/5416 useless extension candidates. Maximal degree in co-relation 46465. Up to 4828 conditions per place. [2024-06-21 16:33:37,132 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 270 selfloop transitions, 104 changer transitions 0/377 dead transitions. [2024-06-21 16:33:37,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 377 transitions, 5093 flow [2024-06-21 16:33:37,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:33:37,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:33:37,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 16:33:37,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-21 16:33:37,134 INFO L175 Difference]: Start difference. First operand has 253 places, 336 transitions, 3801 flow. Second operand 8 states and 147 transitions. [2024-06-21 16:33:37,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 377 transitions, 5093 flow [2024-06-21 16:33:38,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 377 transitions, 4945 flow, removed 48 selfloop flow, removed 3 redundant places. [2024-06-21 16:33:38,083 INFO L231 Difference]: Finished difference. Result has 259 places, 349 transitions, 4082 flow [2024-06-21 16:33:38,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3653, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4082, PETRI_PLACES=259, PETRI_TRANSITIONS=349} [2024-06-21 16:33:38,084 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 217 predicate places. [2024-06-21 16:33:38,084 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 349 transitions, 4082 flow [2024-06-21 16:33:38,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:33:38,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:38,084 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 16:33:38,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 16:33:38,085 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:33:38,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:38,085 INFO L85 PathProgramCache]: Analyzing trace with hash 713945943, now seen corresponding path program 3 times [2024-06-21 16:33:38,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:38,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670310956] [2024-06-21 16:33:38,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:38,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:38,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:38,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:38,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:38,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670310956] [2024-06-21 16:33:38,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670310956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:38,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:38,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:33:38,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171769852] [2024-06-21 16:33:38,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:38,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:33:38,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:38,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:33:38,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:33:38,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:33:38,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 349 transitions, 4082 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:33:38,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:38,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:33:38,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:39,700 INFO L124 PetriNetUnfolderBase]: 3656/5483 cut-off events. [2024-06-21 16:33:39,700 INFO L125 PetriNetUnfolderBase]: For 644346/644349 co-relation queries the response was YES. [2024-06-21 16:33:39,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48008 conditions, 5483 events. 3656/5483 cut-off events. For 644346/644349 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 28874 event pairs, 852 based on Foata normal form. 6/5486 useless extension candidates. Maximal degree in co-relation 47883. Up to 5018 conditions per place. [2024-06-21 16:33:39,757 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 298 selfloop transitions, 79 changer transitions 0/380 dead transitions. [2024-06-21 16:33:39,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 380 transitions, 5368 flow [2024-06-21 16:33:39,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:33:39,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:33:39,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 16:33:39,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-21 16:33:39,759 INFO L175 Difference]: Start difference. First operand has 259 places, 349 transitions, 4082 flow. Second operand 8 states and 141 transitions. [2024-06-21 16:33:39,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 380 transitions, 5368 flow [2024-06-21 16:33:41,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 380 transitions, 5245 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-21 16:33:41,010 INFO L231 Difference]: Finished difference. Result has 263 places, 356 transitions, 4250 flow [2024-06-21 16:33:41,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3959, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4250, PETRI_PLACES=263, PETRI_TRANSITIONS=356} [2024-06-21 16:33:41,011 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-21 16:33:41,011 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 356 transitions, 4250 flow [2024-06-21 16:33:41,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:33:41,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:41,011 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 16:33:41,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 16:33:41,011 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:33:41,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:41,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1306537281, now seen corresponding path program 2 times [2024-06-21 16:33:41,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:41,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063679628] [2024-06-21 16:33:41,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:41,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:41,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:41,556 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 16:33:41,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:41,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063679628] [2024-06-21 16:33:41,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063679628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:41,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:41,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:33:41,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737067837] [2024-06-21 16:33:41,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:41,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:33:41,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:41,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:33:41,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:33:41,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:33:41,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 356 transitions, 4250 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:33:41,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:41,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:33:41,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:42,695 INFO L124 PetriNetUnfolderBase]: 3686/5524 cut-off events. [2024-06-21 16:33:42,696 INFO L125 PetriNetUnfolderBase]: For 667747/667750 co-relation queries the response was YES. [2024-06-21 16:33:42,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48355 conditions, 5524 events. 3686/5524 cut-off events. For 667747/667750 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 29137 event pairs, 882 based on Foata normal form. 8/5530 useless extension candidates. Maximal degree in co-relation 48229. Up to 4922 conditions per place. [2024-06-21 16:33:42,768 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 286 selfloop transitions, 96 changer transitions 0/385 dead transitions. [2024-06-21 16:33:42,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 385 transitions, 5443 flow [2024-06-21 16:33:42,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:33:42,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:33:42,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 16:33:42,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 16:33:42,769 INFO L175 Difference]: Start difference. First operand has 263 places, 356 transitions, 4250 flow. Second operand 8 states and 144 transitions. [2024-06-21 16:33:42,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 385 transitions, 5443 flow [2024-06-21 16:33:43,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 385 transitions, 5300 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-21 16:33:43,949 INFO L231 Difference]: Finished difference. Result has 267 places, 360 transitions, 4366 flow [2024-06-21 16:33:43,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4107, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4366, PETRI_PLACES=267, PETRI_TRANSITIONS=360} [2024-06-21 16:33:43,950 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 225 predicate places. [2024-06-21 16:33:43,950 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 360 transitions, 4366 flow [2024-06-21 16:33:43,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:33:43,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:43,950 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 16:33:43,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 16:33:43,951 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:33:43,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:43,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1306774431, now seen corresponding path program 3 times [2024-06-21 16:33:43,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:43,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945559754] [2024-06-21 16:33:43,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:43,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:43,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:44,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:44,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:44,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945559754] [2024-06-21 16:33:44,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945559754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:44,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:44,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:33:44,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208682199] [2024-06-21 16:33:44,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:44,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:33:44,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:44,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:33:44,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:33:44,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:33:44,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 360 transitions, 4366 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:33:44,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:44,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:33:44,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:45,803 INFO L124 PetriNetUnfolderBase]: 3668/5500 cut-off events. [2024-06-21 16:33:45,803 INFO L125 PetriNetUnfolderBase]: For 669559/669562 co-relation queries the response was YES. [2024-06-21 16:33:45,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48130 conditions, 5500 events. 3668/5500 cut-off events. For 669559/669562 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 29055 event pairs, 878 based on Foata normal form. 8/5506 useless extension candidates. Maximal degree in co-relation 48003. Up to 4911 conditions per place. [2024-06-21 16:33:45,879 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 288 selfloop transitions, 96 changer transitions 0/387 dead transitions. [2024-06-21 16:33:45,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 387 transitions, 5524 flow [2024-06-21 16:33:45,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:33:45,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:33:45,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 16:33:45,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-21 16:33:45,880 INFO L175 Difference]: Start difference. First operand has 267 places, 360 transitions, 4366 flow. Second operand 8 states and 147 transitions. [2024-06-21 16:33:45,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 387 transitions, 5524 flow [2024-06-21 16:33:47,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 387 transitions, 5355 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 16:33:47,189 INFO L231 Difference]: Finished difference. Result has 270 places, 360 transitions, 4396 flow [2024-06-21 16:33:47,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4197, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4396, PETRI_PLACES=270, PETRI_TRANSITIONS=360} [2024-06-21 16:33:47,190 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 228 predicate places. [2024-06-21 16:33:47,190 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 360 transitions, 4396 flow [2024-06-21 16:33:47,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:33:47,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:47,190 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 16:33:47,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 16:33:47,190 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:33:47,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:47,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1306541249, now seen corresponding path program 2 times [2024-06-21 16:33:47,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:47,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719123485] [2024-06-21 16:33:47,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:47,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:47,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:47,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:47,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:47,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719123485] [2024-06-21 16:33:47,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719123485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:47,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:47,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:33:47,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529647622] [2024-06-21 16:33:47,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:47,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:33:47,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:47,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:33:47,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:33:47,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:33:47,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 360 transitions, 4396 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:47,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:47,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:33:47,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:49,064 INFO L124 PetriNetUnfolderBase]: 3704/5551 cut-off events. [2024-06-21 16:33:49,064 INFO L125 PetriNetUnfolderBase]: For 687794/687797 co-relation queries the response was YES. [2024-06-21 16:33:49,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48724 conditions, 5551 events. 3704/5551 cut-off events. For 687794/687797 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 29358 event pairs, 876 based on Foata normal form. 8/5557 useless extension candidates. Maximal degree in co-relation 48596. Up to 4936 conditions per place. [2024-06-21 16:33:49,132 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 287 selfloop transitions, 102 changer transitions 0/392 dead transitions. [2024-06-21 16:33:49,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 392 transitions, 5625 flow [2024-06-21 16:33:49,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:33:49,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:33:49,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 16:33:49,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-21 16:33:49,134 INFO L175 Difference]: Start difference. First operand has 270 places, 360 transitions, 4396 flow. Second operand 9 states and 159 transitions. [2024-06-21 16:33:49,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 392 transitions, 5625 flow [2024-06-21 16:33:50,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 392 transitions, 5458 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 16:33:50,441 INFO L231 Difference]: Finished difference. Result has 274 places, 365 transitions, 4514 flow [2024-06-21 16:33:50,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4229, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4514, PETRI_PLACES=274, PETRI_TRANSITIONS=365} [2024-06-21 16:33:50,441 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 232 predicate places. [2024-06-21 16:33:50,442 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 365 transitions, 4514 flow [2024-06-21 16:33:50,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:50,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:50,442 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 16:33:50,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 16:33:50,442 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:33:50,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:50,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1712298701, now seen corresponding path program 3 times [2024-06-21 16:33:50,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:50,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251402725] [2024-06-21 16:33:50,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:50,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:50,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:51,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:51,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:51,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251402725] [2024-06-21 16:33:51,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251402725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:51,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:51,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:33:51,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404793894] [2024-06-21 16:33:51,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:51,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:33:51,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:51,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:33:51,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:33:51,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:33:51,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 365 transitions, 4514 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:51,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:51,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:33:51,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:52,457 INFO L124 PetriNetUnfolderBase]: 3734/5593 cut-off events. [2024-06-21 16:33:52,457 INFO L125 PetriNetUnfolderBase]: For 706218/706221 co-relation queries the response was YES. [2024-06-21 16:33:52,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49384 conditions, 5593 events. 3734/5593 cut-off events. For 706218/706221 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 29607 event pairs, 881 based on Foata normal form. 8/5599 useless extension candidates. Maximal degree in co-relation 49255. Up to 4982 conditions per place. [2024-06-21 16:33:52,519 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 293 selfloop transitions, 103 changer transitions 0/399 dead transitions. [2024-06-21 16:33:52,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 399 transitions, 5783 flow [2024-06-21 16:33:52,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:33:52,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:33:52,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 16:33:52,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 16:33:52,521 INFO L175 Difference]: Start difference. First operand has 274 places, 365 transitions, 4514 flow. Second operand 9 states and 162 transitions. [2024-06-21 16:33:52,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 399 transitions, 5783 flow [2024-06-21 16:33:53,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 399 transitions, 5547 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-21 16:33:53,947 INFO L231 Difference]: Finished difference. Result has 276 places, 370 transitions, 4575 flow [2024-06-21 16:33:53,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4278, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4575, PETRI_PLACES=276, PETRI_TRANSITIONS=370} [2024-06-21 16:33:53,947 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 234 predicate places. [2024-06-21 16:33:53,947 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 370 transitions, 4575 flow [2024-06-21 16:33:53,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:53,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:53,948 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 16:33:53,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 16:33:53,948 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:33:53,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:53,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1712309241, now seen corresponding path program 3 times [2024-06-21 16:33:53,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:53,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428240557] [2024-06-21 16:33:53,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:53,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:53,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:54,755 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 16:33:54,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:54,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428240557] [2024-06-21 16:33:54,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428240557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:54,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:54,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:33:54,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578142889] [2024-06-21 16:33:54,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:54,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:33:54,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:54,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:33:54,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:33:54,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:33:54,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 370 transitions, 4575 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:54,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:54,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:33:54,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:55,923 INFO L124 PetriNetUnfolderBase]: 3750/5617 cut-off events. [2024-06-21 16:33:55,923 INFO L125 PetriNetUnfolderBase]: For 718221/718224 co-relation queries the response was YES. [2024-06-21 16:33:55,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49702 conditions, 5617 events. 3750/5617 cut-off events. For 718221/718224 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 29706 event pairs, 908 based on Foata normal form. 6/5621 useless extension candidates. Maximal degree in co-relation 49572. Up to 5436 conditions per place. [2024-06-21 16:33:56,005 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 329 selfloop transitions, 60 changer transitions 0/392 dead transitions. [2024-06-21 16:33:56,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 392 transitions, 5442 flow [2024-06-21 16:33:56,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:33:56,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:33:56,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-21 16:33:56,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-21 16:33:56,007 INFO L175 Difference]: Start difference. First operand has 276 places, 370 transitions, 4575 flow. Second operand 9 states and 146 transitions. [2024-06-21 16:33:56,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 392 transitions, 5442 flow [2024-06-21 16:33:57,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 392 transitions, 5232 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 16:33:57,668 INFO L231 Difference]: Finished difference. Result has 279 places, 373 transitions, 4540 flow [2024-06-21 16:33:57,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4365, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4540, PETRI_PLACES=279, PETRI_TRANSITIONS=373} [2024-06-21 16:33:57,668 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-21 16:33:57,668 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 373 transitions, 4540 flow [2024-06-21 16:33:57,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:57,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:57,672 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 16:33:57,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 16:33:57,672 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:33:57,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:57,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1712308931, now seen corresponding path program 4 times [2024-06-21 16:33:57,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:57,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298986717] [2024-06-21 16:33:57,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:57,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:57,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:58,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:58,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:58,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298986717] [2024-06-21 16:33:58,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298986717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:58,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:58,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:33:58,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364939515] [2024-06-21 16:33:58,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:58,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:33:58,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:58,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:33:58,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:33:58,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:33:58,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 373 transitions, 4540 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:58,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:58,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:33:58,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:59,759 INFO L124 PetriNetUnfolderBase]: 3760/5631 cut-off events. [2024-06-21 16:33:59,760 INFO L125 PetriNetUnfolderBase]: For 729181/729184 co-relation queries the response was YES. [2024-06-21 16:33:59,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49611 conditions, 5631 events. 3760/5631 cut-off events. For 729181/729184 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 29839 event pairs, 883 based on Foata normal form. 4/5633 useless extension candidates. Maximal degree in co-relation 49480. Up to 4982 conditions per place. [2024-06-21 16:33:59,838 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 289 selfloop transitions, 116 changer transitions 0/408 dead transitions. [2024-06-21 16:33:59,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 408 transitions, 5836 flow [2024-06-21 16:33:59,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:33:59,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:33:59,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-21 16:33:59,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43414634146341463 [2024-06-21 16:33:59,839 INFO L175 Difference]: Start difference. First operand has 279 places, 373 transitions, 4540 flow. Second operand 10 states and 178 transitions. [2024-06-21 16:33:59,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 408 transitions, 5836 flow [2024-06-21 16:34:01,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 408 transitions, 5692 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 16:34:01,414 INFO L231 Difference]: Finished difference. Result has 282 places, 377 transitions, 4717 flow [2024-06-21 16:34:01,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4396, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4717, PETRI_PLACES=282, PETRI_TRANSITIONS=377} [2024-06-21 16:34:01,415 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 240 predicate places. [2024-06-21 16:34:01,415 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 377 transitions, 4717 flow [2024-06-21 16:34:01,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:34:01,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:34:01,415 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 16:34:01,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 16:34:01,416 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:34:01,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:34:01,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1314116415, now seen corresponding path program 4 times [2024-06-21 16:34:01,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:34:01,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365629441] [2024-06-21 16:34:01,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:34:01,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:34:01,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:34:02,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:34:02,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:34:02,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365629441] [2024-06-21 16:34:02,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365629441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:34:02,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:34:02,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:34:02,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833166284] [2024-06-21 16:34:02,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:34:02,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:34:02,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:34:02,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:34:02,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:34:02,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:34:02,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 377 transitions, 4717 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:34:02,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:34:02,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:34:02,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:34:03,248 INFO L124 PetriNetUnfolderBase]: 3770/5644 cut-off events. [2024-06-21 16:34:03,249 INFO L125 PetriNetUnfolderBase]: For 748960/748960 co-relation queries the response was YES. [2024-06-21 16:34:03,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50411 conditions, 5644 events. 3770/5644 cut-off events. For 748960/748960 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 29864 event pairs, 890 based on Foata normal form. 2/5645 useless extension candidates. Maximal degree in co-relation 50279. Up to 5561 conditions per place. [2024-06-21 16:34:03,319 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 378 selfloop transitions, 22 changer transitions 0/403 dead transitions. [2024-06-21 16:34:03,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 403 transitions, 5645 flow [2024-06-21 16:34:03,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:34:03,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:34:03,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 16:34:03,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-21 16:34:03,320 INFO L175 Difference]: Start difference. First operand has 282 places, 377 transitions, 4717 flow. Second operand 8 states and 132 transitions. [2024-06-21 16:34:03,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 403 transitions, 5645 flow [2024-06-21 16:34:04,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 403 transitions, 5384 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-21 16:34:04,881 INFO L231 Difference]: Finished difference. Result has 282 places, 380 transitions, 4572 flow [2024-06-21 16:34:04,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4456, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4572, PETRI_PLACES=282, PETRI_TRANSITIONS=380} [2024-06-21 16:34:04,882 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 240 predicate places. [2024-06-21 16:34:04,882 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 380 transitions, 4572 flow [2024-06-21 16:34:04,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:34:04,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:34:04,882 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 16:34:04,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 16:34:04,883 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:34:04,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:34:04,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1702274603, now seen corresponding path program 4 times [2024-06-21 16:34:04,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:34:04,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269698188] [2024-06-21 16:34:04,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:34:04,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:34:04,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:34:05,408 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 16:34:05,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:34:05,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269698188] [2024-06-21 16:34:05,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269698188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:34:05,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:34:05,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:34:05,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085314484] [2024-06-21 16:34:05,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:34:05,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:34:05,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:34:05,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:34:05,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:34:05,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:34:05,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 380 transitions, 4572 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:34:05,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:34:05,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:34:05,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:34:06,586 INFO L124 PetriNetUnfolderBase]: 3749/5614 cut-off events. [2024-06-21 16:34:06,586 INFO L125 PetriNetUnfolderBase]: For 758945/758945 co-relation queries the response was YES. [2024-06-21 16:34:06,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49806 conditions, 5614 events. 3749/5614 cut-off events. For 758945/758945 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 29702 event pairs, 879 based on Foata normal form. 3/5616 useless extension candidates. Maximal degree in co-relation 49673. Up to 5511 conditions per place. [2024-06-21 16:34:06,659 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 358 selfloop transitions, 41 changer transitions 0/402 dead transitions. [2024-06-21 16:34:06,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 402 transitions, 5598 flow [2024-06-21 16:34:06,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:34:06,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:34:06,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 16:34:06,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-21 16:34:06,661 INFO L175 Difference]: Start difference. First operand has 282 places, 380 transitions, 4572 flow. Second operand 8 states and 135 transitions. [2024-06-21 16:34:06,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 402 transitions, 5598 flow [2024-06-21 16:34:08,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 402 transitions, 5498 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 16:34:08,120 INFO L231 Difference]: Finished difference. Result has 284 places, 380 transitions, 4560 flow [2024-06-21 16:34:08,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4472, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4560, PETRI_PLACES=284, PETRI_TRANSITIONS=380} [2024-06-21 16:34:08,121 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2024-06-21 16:34:08,121 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 380 transitions, 4560 flow [2024-06-21 16:34:08,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:34:08,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:34:08,121 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 16:34:08,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 16:34:08,121 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:34:08,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:34:08,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1702274789, now seen corresponding path program 5 times [2024-06-21 16:34:08,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:34:08,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138753670] [2024-06-21 16:34:08,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:34:08,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:34:08,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:34:08,647 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 16:34:08,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:34:08,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138753670] [2024-06-21 16:34:08,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138753670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:34:08,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:34:08,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:34:08,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91765980] [2024-06-21 16:34:08,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:34:08,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:34:08,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:34:08,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:34:08,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:34:08,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:34:08,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 380 transitions, 4560 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:34:08,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:34:08,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:34:08,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:34:09,851 INFO L124 PetriNetUnfolderBase]: 3759/5628 cut-off events. [2024-06-21 16:34:09,851 INFO L125 PetriNetUnfolderBase]: For 774300/774300 co-relation queries the response was YES. [2024-06-21 16:34:09,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50111 conditions, 5628 events. 3759/5628 cut-off events. For 774300/774300 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 29784 event pairs, 880 based on Foata normal form. 2/5629 useless extension candidates. Maximal degree in co-relation 49977. Up to 5484 conditions per place. [2024-06-21 16:34:09,913 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 360 selfloop transitions, 48 changer transitions 0/411 dead transitions. [2024-06-21 16:34:09,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 411 transitions, 5962 flow [2024-06-21 16:34:09,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:34:09,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:34:09,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 16:34:09,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-21 16:34:09,914 INFO L175 Difference]: Start difference. First operand has 284 places, 380 transitions, 4560 flow. Second operand 8 states and 135 transitions. [2024-06-21 16:34:09,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 411 transitions, 5962 flow [2024-06-21 16:34:11,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 411 transitions, 5528 flow, removed 10 selfloop flow, removed 13 redundant places. [2024-06-21 16:34:11,350 INFO L231 Difference]: Finished difference. Result has 280 places, 389 transitions, 4458 flow [2024-06-21 16:34:11,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4126, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4458, PETRI_PLACES=280, PETRI_TRANSITIONS=389} [2024-06-21 16:34:11,350 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 238 predicate places. [2024-06-21 16:34:11,350 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 389 transitions, 4458 flow [2024-06-21 16:34:11,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:34:11,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:34:11,351 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 16:34:11,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 16:34:11,351 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:34:11,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:34:11,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1279804505, now seen corresponding path program 6 times [2024-06-21 16:34:11,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:34:11,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138486650] [2024-06-21 16:34:11,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:34:11,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:34:11,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:34:11,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:34:11,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:34:11,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138486650] [2024-06-21 16:34:11,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138486650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:34:11,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:34:11,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:34:11,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026843043] [2024-06-21 16:34:11,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:34:11,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:34:11,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:34:11,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:34:11,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:34:11,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:34:11,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 389 transitions, 4458 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:34:11,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:34:11,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:34:11,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:34:13,166 INFO L124 PetriNetUnfolderBase]: 3769/5642 cut-off events. [2024-06-21 16:34:13,166 INFO L125 PetriNetUnfolderBase]: For 789688/789688 co-relation queries the response was YES. [2024-06-21 16:34:13,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50189 conditions, 5642 events. 3769/5642 cut-off events. For 789688/789688 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 29885 event pairs, 882 based on Foata normal form. 2/5643 useless extension candidates. Maximal degree in co-relation 50055. Up to 5574 conditions per place. [2024-06-21 16:34:13,250 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 391 selfloop transitions, 23 changer transitions 0/417 dead transitions. [2024-06-21 16:34:13,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 417 transitions, 5600 flow [2024-06-21 16:34:13,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:34:13,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:34:13,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-21 16:34:13,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-21 16:34:13,251 INFO L175 Difference]: Start difference. First operand has 280 places, 389 transitions, 4458 flow. Second operand 9 states and 143 transitions. [2024-06-21 16:34:13,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 417 transitions, 5600 flow [2024-06-21 16:34:14,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 417 transitions, 5463 flow, removed 55 selfloop flow, removed 3 redundant places. [2024-06-21 16:34:14,778 INFO L231 Difference]: Finished difference. Result has 288 places, 393 transitions, 4477 flow [2024-06-21 16:34:14,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4330, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4477, PETRI_PLACES=288, PETRI_TRANSITIONS=393} [2024-06-21 16:34:14,778 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 246 predicate places. [2024-06-21 16:34:14,778 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 393 transitions, 4477 flow [2024-06-21 16:34:14,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:34:14,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:34:14,779 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 16:34:14,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 16:34:14,779 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:34:14,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:34:14,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1474969059, now seen corresponding path program 7 times [2024-06-21 16:34:14,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:34:14,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353803399] [2024-06-21 16:34:14,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:34:14,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:34:14,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:34:15,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:34:15,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:34:15,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353803399] [2024-06-21 16:34:15,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353803399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:34:15,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:34:15,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:34:15,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763593911] [2024-06-21 16:34:15,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:34:15,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:34:15,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:34:15,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:34:15,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:34:15,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:34:15,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 393 transitions, 4477 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:34:15,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:34:15,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:34:15,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:34:16,531 INFO L124 PetriNetUnfolderBase]: 3763/5634 cut-off events. [2024-06-21 16:34:16,531 INFO L125 PetriNetUnfolderBase]: For 799692/799692 co-relation queries the response was YES. [2024-06-21 16:34:16,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50108 conditions, 5634 events. 3763/5634 cut-off events. For 799692/799692 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 29782 event pairs, 889 based on Foata normal form. 2/5635 useless extension candidates. Maximal degree in co-relation 49971. Up to 5595 conditions per place. [2024-06-21 16:34:16,608 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 391 selfloop transitions, 17 changer transitions 0/411 dead transitions. [2024-06-21 16:34:16,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 411 transitions, 5341 flow [2024-06-21 16:34:16,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:34:16,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:34:16,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-21 16:34:16,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38109756097560976 [2024-06-21 16:34:16,610 INFO L175 Difference]: Start difference. First operand has 288 places, 393 transitions, 4477 flow. Second operand 8 states and 125 transitions. [2024-06-21 16:34:16,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 411 transitions, 5341 flow [2024-06-21 16:34:17,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 411 transitions, 5241 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 16:34:17,968 INFO L231 Difference]: Finished difference. Result has 290 places, 393 transitions, 4417 flow [2024-06-21 16:34:17,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4377, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4417, PETRI_PLACES=290, PETRI_TRANSITIONS=393} [2024-06-21 16:34:17,968 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 248 predicate places. [2024-06-21 16:34:17,968 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 393 transitions, 4417 flow [2024-06-21 16:34:17,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:34:17,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:34:17,969 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 16:34:17,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 16:34:17,973 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:34:17,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:34:17,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1347774599, now seen corresponding path program 8 times [2024-06-21 16:34:17,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:34:17,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74253606] [2024-06-21 16:34:17,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:34:17,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:34:17,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:34:18,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:34:18,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:34:18,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74253606] [2024-06-21 16:34:18,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74253606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:34:18,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:34:18,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:34:18,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341881380] [2024-06-21 16:34:18,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:34:18,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:34:18,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:34:18,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:34:18,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:34:18,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:34:18,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 393 transitions, 4417 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:34:18,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:34:18,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:34:18,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:34:19,721 INFO L124 PetriNetUnfolderBase]: 3773/5648 cut-off events. [2024-06-21 16:34:19,721 INFO L125 PetriNetUnfolderBase]: For 818815/818815 co-relation queries the response was YES. [2024-06-21 16:34:19,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50360 conditions, 5648 events. 3773/5648 cut-off events. For 818815/818815 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 29924 event pairs, 892 based on Foata normal form. 2/5649 useless extension candidates. Maximal degree in co-relation 50222. Up to 5594 conditions per place. [2024-06-21 16:34:19,808 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 380 selfloop transitions, 29 changer transitions 0/412 dead transitions. [2024-06-21 16:34:19,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 412 transitions, 5358 flow [2024-06-21 16:34:19,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:34:19,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:34:19,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-21 16:34:19,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-21 16:34:19,809 INFO L175 Difference]: Start difference. First operand has 290 places, 393 transitions, 4417 flow. Second operand 8 states and 126 transitions. [2024-06-21 16:34:19,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 412 transitions, 5358 flow [2024-06-21 16:34:21,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 412 transitions, 5312 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 16:34:21,552 INFO L231 Difference]: Finished difference. Result has 291 places, 397 transitions, 4524 flow [2024-06-21 16:34:21,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4371, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4524, PETRI_PLACES=291, PETRI_TRANSITIONS=397} [2024-06-21 16:34:21,553 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 249 predicate places. [2024-06-21 16:34:21,553 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 397 transitions, 4524 flow [2024-06-21 16:34:21,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:34:21,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:34:21,553 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 16:34:21,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 16:34:21,553 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:34:21,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:34:21,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1347595853, now seen corresponding path program 5 times [2024-06-21 16:34:21,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:34:21,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474256066] [2024-06-21 16:34:21,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:34:21,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:34:21,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:34:22,084 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 16:34:22,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:34:22,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474256066] [2024-06-21 16:34:22,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474256066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:34:22,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:34:22,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:34:22,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117327756] [2024-06-21 16:34:22,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:34:22,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:34:22,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:34:22,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:34:22,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:34:22,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:34:22,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 397 transitions, 4524 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:34:22,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:34:22,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:34:22,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:34:23,347 INFO L124 PetriNetUnfolderBase]: 3788/5669 cut-off events. [2024-06-21 16:34:23,347 INFO L125 PetriNetUnfolderBase]: For 841446/841446 co-relation queries the response was YES. [2024-06-21 16:34:23,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50731 conditions, 5669 events. 3788/5669 cut-off events. For 841446/841446 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 29997 event pairs, 886 based on Foata normal form. 3/5671 useless extension candidates. Maximal degree in co-relation 50592. Up to 5618 conditions per place. [2024-06-21 16:34:23,411 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 386 selfloop transitions, 28 changer transitions 0/417 dead transitions. [2024-06-21 16:34:23,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 417 transitions, 5441 flow [2024-06-21 16:34:23,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:34:23,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:34:23,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 16:34:23,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-21 16:34:23,413 INFO L175 Difference]: Start difference. First operand has 291 places, 397 transitions, 4524 flow. Second operand 8 states and 127 transitions. [2024-06-21 16:34:23,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 417 transitions, 5441 flow [2024-06-21 16:34:25,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 417 transitions, 5321 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 16:34:25,046 INFO L231 Difference]: Finished difference. Result has 293 places, 401 transitions, 4515 flow [2024-06-21 16:34:25,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4404, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4515, PETRI_PLACES=293, PETRI_TRANSITIONS=401} [2024-06-21 16:34:25,047 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 251 predicate places. [2024-06-21 16:34:25,047 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 401 transitions, 4515 flow [2024-06-21 16:34:25,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:34:25,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:34:25,047 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 16:34:25,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 16:34:25,048 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:34:25,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:34:25,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1348011749, now seen corresponding path program 9 times [2024-06-21 16:34:25,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:34:25,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143170224] [2024-06-21 16:34:25,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:34:25,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:34:25,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:34:25,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:34:25,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:34:25,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143170224] [2024-06-21 16:34:25,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143170224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:34:25,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:34:25,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:34:25,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933624932] [2024-06-21 16:34:25,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:34:25,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:34:25,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:34:25,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:34:25,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:34:25,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:34:25,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 401 transitions, 4515 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:34:25,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:34:25,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:34:25,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:34:26,776 INFO L124 PetriNetUnfolderBase]: 3798/5683 cut-off events. [2024-06-21 16:34:26,776 INFO L125 PetriNetUnfolderBase]: For 857040/857040 co-relation queries the response was YES. [2024-06-21 16:34:26,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51046 conditions, 5683 events. 3798/5683 cut-off events. For 857040/857040 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 30128 event pairs, 887 based on Foata normal form. 2/5684 useless extension candidates. Maximal degree in co-relation 50907. Up to 5614 conditions per place. [2024-06-21 16:34:26,851 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 380 selfloop transitions, 37 changer transitions 0/420 dead transitions. [2024-06-21 16:34:26,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 420 transitions, 5474 flow [2024-06-21 16:34:26,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:34:26,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:34:26,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-21 16:34:26,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-21 16:34:26,852 INFO L175 Difference]: Start difference. First operand has 293 places, 401 transitions, 4515 flow. Second operand 8 states and 128 transitions. [2024-06-21 16:34:26,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 420 transitions, 5474 flow [2024-06-21 16:34:28,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 420 transitions, 5408 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 16:34:28,630 INFO L231 Difference]: Finished difference. Result has 296 places, 404 transitions, 4614 flow [2024-06-21 16:34:28,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4449, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4614, PETRI_PLACES=296, PETRI_TRANSITIONS=404} [2024-06-21 16:34:28,631 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 254 predicate places. [2024-06-21 16:34:28,631 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 404 transitions, 4614 flow [2024-06-21 16:34:28,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:34:28,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:34:28,631 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 16:34:28,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 16:34:28,632 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:34:28,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:34:28,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1348011563, now seen corresponding path program 6 times [2024-06-21 16:34:28,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:34:28,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026698937] [2024-06-21 16:34:28,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:34:28,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:34:28,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:34:29,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:34:29,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:34:29,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026698937] [2024-06-21 16:34:29,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026698937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:34:29,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:34:29,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:34:29,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760851585] [2024-06-21 16:34:29,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:34:29,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:34:29,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:34:29,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:34:29,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:34:29,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:34:29,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 404 transitions, 4614 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:34:29,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:34:29,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:34:29,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:34:30,397 INFO L124 PetriNetUnfolderBase]: 3813/5704 cut-off events. [2024-06-21 16:34:30,397 INFO L125 PetriNetUnfolderBase]: For 880190/880190 co-relation queries the response was YES. [2024-06-21 16:34:30,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51404 conditions, 5704 events. 3813/5704 cut-off events. For 880190/880190 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 30220 event pairs, 882 based on Foata normal form. 3/5706 useless extension candidates. Maximal degree in co-relation 51264. Up to 5641 conditions per place. [2024-06-21 16:34:30,477 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 389 selfloop transitions, 33 changer transitions 0/425 dead transitions. [2024-06-21 16:34:30,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 425 transitions, 5552 flow [2024-06-21 16:34:30,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:34:30,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:34:30,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 16:34:30,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-21 16:34:30,478 INFO L175 Difference]: Start difference. First operand has 296 places, 404 transitions, 4614 flow. Second operand 8 states and 131 transitions. [2024-06-21 16:34:30,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 425 transitions, 5552 flow [2024-06-21 16:34:32,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 425 transitions, 5424 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 16:34:32,221 INFO L231 Difference]: Finished difference. Result has 298 places, 407 transitions, 4600 flow [2024-06-21 16:34:32,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4486, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4600, PETRI_PLACES=298, PETRI_TRANSITIONS=407} [2024-06-21 16:34:32,222 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 256 predicate places. [2024-06-21 16:34:32,222 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 407 transitions, 4600 flow [2024-06-21 16:34:32,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:34:32,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:34:32,222 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 16:34:32,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 16:34:32,223 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:34:32,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:34:32,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1771983749, now seen corresponding path program 7 times [2024-06-21 16:34:32,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:34:32,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877001122] [2024-06-21 16:34:32,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:34:32,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:34:32,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:34:32,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:34:32,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:34:32,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877001122] [2024-06-21 16:34:32,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877001122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:34:32,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:34:32,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:34:32,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313254375] [2024-06-21 16:34:32,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:34:32,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:34:32,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:34:32,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:34:32,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:34:32,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:34:32,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 407 transitions, 4600 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:34:32,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:34:32,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:34:32,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:34:33,891 INFO L124 PetriNetUnfolderBase]: 3795/5681 cut-off events. [2024-06-21 16:34:33,891 INFO L125 PetriNetUnfolderBase]: For 887358/887361 co-relation queries the response was YES. [2024-06-21 16:34:33,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50916 conditions, 5681 events. 3795/5681 cut-off events. For 887358/887361 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 30102 event pairs, 880 based on Foata normal form. 8/5687 useless extension candidates. Maximal degree in co-relation 50775. Up to 5535 conditions per place. [2024-06-21 16:34:33,967 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 381 selfloop transitions, 39 changer transitions 0/423 dead transitions. [2024-06-21 16:34:33,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 423 transitions, 5668 flow [2024-06-21 16:34:33,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:34:33,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:34:33,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 16:34:33,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-21 16:34:33,968 INFO L175 Difference]: Start difference. First operand has 298 places, 407 transitions, 4600 flow. Second operand 8 states and 129 transitions. [2024-06-21 16:34:33,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 423 transitions, 5668 flow [2024-06-21 16:34:35,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 423 transitions, 5594 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 16:34:35,831 INFO L231 Difference]: Finished difference. Result has 300 places, 407 transitions, 4612 flow [2024-06-21 16:34:35,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4526, PETRI_DIFFERENCE_MINUEND_PLACES=292, 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=8, PETRI_FLOW=4612, PETRI_PLACES=300, PETRI_TRANSITIONS=407} [2024-06-21 16:34:35,845 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 258 predicate places. [2024-06-21 16:34:35,845 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 407 transitions, 4612 flow [2024-06-21 16:34:35,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:34:35,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:34:35,845 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 16:34:35,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 16:34:35,845 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:34:35,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:34:35,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1182135465, now seen corresponding path program 10 times [2024-06-21 16:34:35,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:34:35,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815063393] [2024-06-21 16:34:35,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:34:35,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:34:35,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:34:36,411 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 16:34:36,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:34:36,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815063393] [2024-06-21 16:34:36,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815063393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:34:36,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:34:36,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:34:36,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127189339] [2024-06-21 16:34:36,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:34:36,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:34:36,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:34:36,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:34:36,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:34:36,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:34:36,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 407 transitions, 4612 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:34:36,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:34:36,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:34:36,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:34:37,756 INFO L124 PetriNetUnfolderBase]: 3805/5696 cut-off events. [2024-06-21 16:34:37,756 INFO L125 PetriNetUnfolderBase]: For 891950/891953 co-relation queries the response was YES. [2024-06-21 16:34:37,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51355 conditions, 5696 events. 3805/5696 cut-off events. For 891950/891953 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 30203 event pairs, 892 based on Foata normal form. 4/5697 useless extension candidates. Maximal degree in co-relation 51213. Up to 5640 conditions per place. [2024-06-21 16:34:37,826 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 390 selfloop transitions, 29 changer transitions 0/422 dead transitions. [2024-06-21 16:34:37,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 422 transitions, 5567 flow [2024-06-21 16:34:37,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:34:37,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:34:37,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-21 16:34:37,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 16:34:37,828 INFO L175 Difference]: Start difference. First operand has 300 places, 407 transitions, 4612 flow. Second operand 8 states and 123 transitions. [2024-06-21 16:34:37,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 422 transitions, 5567 flow [2024-06-21 16:34:39,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 422 transitions, 5496 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 16:34:39,603 INFO L231 Difference]: Finished difference. Result has 303 places, 410 transitions, 4696 flow [2024-06-21 16:34:39,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4541, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4696, PETRI_PLACES=303, PETRI_TRANSITIONS=410} [2024-06-21 16:34:39,604 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 261 predicate places. [2024-06-21 16:34:39,604 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 410 transitions, 4696 flow [2024-06-21 16:34:39,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:34:39,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:34:39,604 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 16:34:39,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 16:34:39,605 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:34:39,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:34:39,605 INFO L85 PathProgramCache]: Analyzing trace with hash 14721959, now seen corresponding path program 11 times [2024-06-21 16:34:39,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:34:39,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794904013] [2024-06-21 16:34:39,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:34:39,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:34:39,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:34:40,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:34:40,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:34:40,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794904013] [2024-06-21 16:34:40,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794904013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:34:40,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:34:40,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:34:40,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281693270] [2024-06-21 16:34:40,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:34:40,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:34:40,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:34:40,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:34:40,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:34:40,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:34:40,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 410 transitions, 4696 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:34:40,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:34:40,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:34:40,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:34:41,566 INFO L124 PetriNetUnfolderBase]: 3799/5688 cut-off events. [2024-06-21 16:34:41,567 INFO L125 PetriNetUnfolderBase]: For 903047/903050 co-relation queries the response was YES. [2024-06-21 16:34:41,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51233 conditions, 5688 events. 3799/5688 cut-off events. For 903047/903050 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 30177 event pairs, 891 based on Foata normal form. 4/5689 useless extension candidates. Maximal degree in co-relation 51090. Up to 5623 conditions per place. [2024-06-21 16:34:41,637 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 386 selfloop transitions, 34 changer transitions 0/423 dead transitions. [2024-06-21 16:34:41,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 423 transitions, 5574 flow [2024-06-21 16:34:41,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:34:41,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:34:41,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-21 16:34:41,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-21 16:34:41,638 INFO L175 Difference]: Start difference. First operand has 303 places, 410 transitions, 4696 flow. Second operand 8 states and 126 transitions. [2024-06-21 16:34:41,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 423 transitions, 5574 flow [2024-06-21 16:34:43,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 423 transitions, 5412 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-21 16:34:43,441 INFO L231 Difference]: Finished difference. Result has 305 places, 410 transitions, 4608 flow [2024-06-21 16:34:43,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4534, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4608, PETRI_PLACES=305, PETRI_TRANSITIONS=410} [2024-06-21 16:34:43,442 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 263 predicate places. [2024-06-21 16:34:43,442 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 410 transitions, 4608 flow [2024-06-21 16:34:43,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:34:43,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:34:43,442 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 16:34:43,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 16:34:43,442 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:34:43,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:34:43,443 INFO L85 PathProgramCache]: Analyzing trace with hash 243039005, now seen corresponding path program 8 times [2024-06-21 16:34:43,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:34:43,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209844205] [2024-06-21 16:34:43,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:34:43,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:34:43,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:34:44,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:34:44,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:34:44,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209844205] [2024-06-21 16:34:44,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209844205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:34:44,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:34:44,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:34:44,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044842069] [2024-06-21 16:34:44,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:34:44,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:34:44,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:34:44,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:34:44,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:34:44,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:34:44,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 410 transitions, 4608 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:34:44,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:34:44,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:34:44,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:34:45,282 INFO L124 PetriNetUnfolderBase]: 3814/5708 cut-off events. [2024-06-21 16:34:45,283 INFO L125 PetriNetUnfolderBase]: For 925264/925267 co-relation queries the response was YES. [2024-06-21 16:34:45,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51429 conditions, 5708 events. 3814/5708 cut-off events. For 925264/925267 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 30284 event pairs, 887 based on Foata normal form. 5/5711 useless extension candidates. Maximal degree in co-relation 51285. Up to 5656 conditions per place. [2024-06-21 16:34:45,362 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 394 selfloop transitions, 30 changer transitions 0/427 dead transitions. [2024-06-21 16:34:45,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 427 transitions, 5545 flow [2024-06-21 16:34:45,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:34:45,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:34:45,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-21 16:34:45,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 16:34:45,363 INFO L175 Difference]: Start difference. First operand has 305 places, 410 transitions, 4608 flow. Second operand 8 states and 123 transitions. [2024-06-21 16:34:45,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 427 transitions, 5545 flow [2024-06-21 16:34:47,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 427 transitions, 5399 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-21 16:34:47,488 INFO L231 Difference]: Finished difference. Result has 305 places, 414 transitions, 4585 flow [2024-06-21 16:34:47,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4462, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4585, PETRI_PLACES=305, PETRI_TRANSITIONS=414} [2024-06-21 16:34:47,488 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 263 predicate places. [2024-06-21 16:34:47,488 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 414 transitions, 4585 flow [2024-06-21 16:34:47,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:34:47,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:34:47,489 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 16:34:47,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 16:34:47,489 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:34:47,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:34:47,489 INFO L85 PathProgramCache]: Analyzing trace with hash -517391495, now seen corresponding path program 9 times [2024-06-21 16:34:47,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:34:47,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301560943] [2024-06-21 16:34:47,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:34:47,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:34:47,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:34:47,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:34:47,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:34:47,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301560943] [2024-06-21 16:34:47,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301560943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:34:47,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:34:47,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:34:47,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757145766] [2024-06-21 16:34:47,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:34:47,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:34:47,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:34:47,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:34:47,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:34:48,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:34:48,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 414 transitions, 4585 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:34:48,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:34:48,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:34:48,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:34:49,207 INFO L124 PetriNetUnfolderBase]: 3805/5696 cut-off events. [2024-06-21 16:34:49,207 INFO L125 PetriNetUnfolderBase]: For 931722/931725 co-relation queries the response was YES. [2024-06-21 16:34:49,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51208 conditions, 5696 events. 3805/5696 cut-off events. For 931722/931725 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 30208 event pairs, 883 based on Foata normal form. 5/5699 useless extension candidates. Maximal degree in co-relation 51064. Up to 5618 conditions per place. [2024-06-21 16:34:49,288 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 390 selfloop transitions, 37 changer transitions 0/430 dead transitions. [2024-06-21 16:34:49,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 430 transitions, 5675 flow [2024-06-21 16:34:49,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:34:49,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:34:49,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-21 16:34:49,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-21 16:34:49,290 INFO L175 Difference]: Start difference. First operand has 305 places, 414 transitions, 4585 flow. Second operand 8 states and 128 transitions. [2024-06-21 16:34:49,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 430 transitions, 5675 flow [2024-06-21 16:34:51,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 430 transitions, 5603 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 16:34:51,484 INFO L231 Difference]: Finished difference. Result has 308 places, 414 transitions, 4593 flow [2024-06-21 16:34:51,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4513, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4593, PETRI_PLACES=308, PETRI_TRANSITIONS=414} [2024-06-21 16:34:51,484 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 266 predicate places. [2024-06-21 16:34:51,484 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 414 transitions, 4593 flow [2024-06-21 16:34:51,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:34:51,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:34:51,485 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 16:34:51,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 16:34:51,485 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:34:51,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:34:51,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1181956719, now seen corresponding path program 10 times [2024-06-21 16:34:51,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:34:51,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291131300] [2024-06-21 16:34:51,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:34:51,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:34:51,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:34:51,982 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 16:34:51,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:34:51,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291131300] [2024-06-21 16:34:51,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291131300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:34:51,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:34:51,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:34:51,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030150263] [2024-06-21 16:34:51,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:34:51,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:34:51,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:34:51,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:34:51,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:34:52,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:34:52,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 414 transitions, 4593 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:34:52,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:34:52,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:34:52,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:34:53,257 INFO L124 PetriNetUnfolderBase]: 3790/5675 cut-off events. [2024-06-21 16:34:53,258 INFO L125 PetriNetUnfolderBase]: For 938133/938136 co-relation queries the response was YES. [2024-06-21 16:34:53,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51023 conditions, 5675 events. 3790/5675 cut-off events. For 938133/938136 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 30101 event pairs, 881 based on Foata normal form. 5/5678 useless extension candidates. Maximal degree in co-relation 50878. Up to 5623 conditions per place. [2024-06-21 16:34:53,338 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 395 selfloop transitions, 29 changer transitions 0/427 dead transitions. [2024-06-21 16:34:53,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 427 transitions, 5479 flow [2024-06-21 16:34:53,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:34:53,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:34:53,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-21 16:34:53,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-21 16:34:53,339 INFO L175 Difference]: Start difference. First operand has 308 places, 414 transitions, 4593 flow. Second operand 8 states and 124 transitions. [2024-06-21 16:34:53,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 427 transitions, 5479 flow [2024-06-21 16:34:55,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 427 transitions, 5353 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 16:34:55,605 INFO L231 Difference]: Finished difference. Result has 310 places, 414 transitions, 4531 flow [2024-06-21 16:34:55,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4467, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4531, PETRI_PLACES=310, PETRI_TRANSITIONS=414} [2024-06-21 16:34:55,605 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 268 predicate places. [2024-06-21 16:34:55,606 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 414 transitions, 4531 flow [2024-06-21 16:34:55,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:34:55,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:34:55,606 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 16:34:55,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 16:34:55,606 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:34:55,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:34:55,606 INFO L85 PathProgramCache]: Analyzing trace with hash -522033311, now seen corresponding path program 12 times [2024-06-21 16:34:55,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:34:55,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289566938] [2024-06-21 16:34:55,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:34:55,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:34:55,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:34:56,214 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 16:34:56,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:34:56,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289566938] [2024-06-21 16:34:56,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289566938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:34:56,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:34:56,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:34:56,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801712564] [2024-06-21 16:34:56,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:34:56,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:34:56,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:34:56,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:34:56,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:34:56,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:34:56,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 414 transitions, 4531 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:34:56,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:34:56,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:34:56,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:34:57,482 INFO L124 PetriNetUnfolderBase]: 3778/5660 cut-off events. [2024-06-21 16:34:57,482 INFO L125 PetriNetUnfolderBase]: For 943467/943470 co-relation queries the response was YES. [2024-06-21 16:34:57,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50610 conditions, 5660 events. 3778/5660 cut-off events. For 943467/943470 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 30028 event pairs, 883 based on Foata normal form. 6/5663 useless extension candidates. Maximal degree in co-relation 50464. Up to 5510 conditions per place. [2024-06-21 16:34:57,559 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 373 selfloop transitions, 52 changer transitions 0/428 dead transitions. [2024-06-21 16:34:57,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 428 transitions, 5609 flow [2024-06-21 16:34:57,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:34:57,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:34:57,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 16:34:57,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-21 16:34:57,560 INFO L175 Difference]: Start difference. First operand has 310 places, 414 transitions, 4531 flow. Second operand 8 states and 130 transitions. [2024-06-21 16:34:57,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 428 transitions, 5609 flow [2024-06-21 16:34:59,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 428 transitions, 5450 flow, removed 19 selfloop flow, removed 10 redundant places. [2024-06-21 16:34:59,738 INFO L231 Difference]: Finished difference. Result has 308 places, 414 transitions, 4483 flow [2024-06-21 16:34:59,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4372, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4483, PETRI_PLACES=308, PETRI_TRANSITIONS=414} [2024-06-21 16:34:59,738 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 266 predicate places. [2024-06-21 16:34:59,738 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 414 transitions, 4483 flow [2024-06-21 16:34:59,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:34:59,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:34:59,739 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 16:34:59,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 16:34:59,739 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:34:59,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:34:59,739 INFO L85 PathProgramCache]: Analyzing trace with hash -522033125, now seen corresponding path program 11 times [2024-06-21 16:34:59,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:34:59,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792945292] [2024-06-21 16:34:59,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:34:59,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:34:59,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:35:00,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:35:00,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:35:00,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792945292] [2024-06-21 16:35:00,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792945292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:35:00,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:35:00,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:35:00,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305766471] [2024-06-21 16:35:00,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:35:00,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:35:00,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:35:00,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:35:00,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:35:00,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:35:00,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 414 transitions, 4483 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:35:00,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:35:00,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:35:00,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:35:01,634 INFO L124 PetriNetUnfolderBase]: 3808/5701 cut-off events. [2024-06-21 16:35:01,634 INFO L125 PetriNetUnfolderBase]: For 971580/971583 co-relation queries the response was YES. [2024-06-21 16:35:01,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51001 conditions, 5701 events. 3808/5701 cut-off events. For 971580/971583 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 30215 event pairs, 859 based on Foata normal form. 8/5707 useless extension candidates. Maximal degree in co-relation 50854. Up to 5373 conditions per place. [2024-06-21 16:35:01,703 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 362 selfloop transitions, 71 changer transitions 0/436 dead transitions. [2024-06-21 16:35:01,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 436 transitions, 5649 flow [2024-06-21 16:35:01,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:35:01,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:35:01,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 16:35:01,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-21 16:35:01,705 INFO L175 Difference]: Start difference. First operand has 308 places, 414 transitions, 4483 flow. Second operand 8 states and 134 transitions. [2024-06-21 16:35:01,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 436 transitions, 5649 flow [2024-06-21 16:35:04,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 436 transitions, 5467 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 16:35:04,354 INFO L231 Difference]: Finished difference. Result has 309 places, 418 transitions, 4496 flow [2024-06-21 16:35:04,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4301, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4496, PETRI_PLACES=309, PETRI_TRANSITIONS=418} [2024-06-21 16:35:04,355 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 267 predicate places. [2024-06-21 16:35:04,355 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 418 transitions, 4496 flow [2024-06-21 16:35:04,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:35:04,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:35:04,355 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 16:35:04,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 16:35:04,355 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:35:04,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:35:04,356 INFO L85 PathProgramCache]: Analyzing trace with hash -521795975, now seen corresponding path program 12 times [2024-06-21 16:35:04,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:35:04,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559067931] [2024-06-21 16:35:04,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:35:04,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:35:04,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:35:04,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:35:04,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:35:04,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559067931] [2024-06-21 16:35:04,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559067931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:35:04,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:35:04,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:35:04,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190318196] [2024-06-21 16:35:04,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:35:04,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:35:04,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:35:04,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:35:04,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:35:04,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:35:04,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 418 transitions, 4496 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:35:04,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:35:04,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:35:04,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:35:06,079 INFO L124 PetriNetUnfolderBase]: 3784/5668 cut-off events. [2024-06-21 16:35:06,079 INFO L125 PetriNetUnfolderBase]: For 962984/962987 co-relation queries the response was YES. [2024-06-21 16:35:06,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50543 conditions, 5668 events. 3784/5668 cut-off events. For 962984/962987 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 30101 event pairs, 865 based on Foata normal form. 8/5674 useless extension candidates. Maximal degree in co-relation 50395. Up to 5355 conditions per place. [2024-06-21 16:35:06,164 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 364 selfloop transitions, 68 changer transitions 0/435 dead transitions. [2024-06-21 16:35:06,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 435 transitions, 5422 flow [2024-06-21 16:35:06,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:35:06,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:35:06,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 16:35:06,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-21 16:35:06,165 INFO L175 Difference]: Start difference. First operand has 309 places, 418 transitions, 4496 flow. Second operand 8 states and 133 transitions. [2024-06-21 16:35:06,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 435 transitions, 5422 flow [2024-06-21 16:35:08,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 435 transitions, 5180 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 16:35:08,752 INFO L231 Difference]: Finished difference. Result has 310 places, 418 transitions, 4399 flow [2024-06-21 16:35:08,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4254, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4399, PETRI_PLACES=310, PETRI_TRANSITIONS=418} [2024-06-21 16:35:08,753 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 268 predicate places. [2024-06-21 16:35:08,753 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 418 transitions, 4399 flow [2024-06-21 16:35:08,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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 16:35:08,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:35:08,753 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 16:35:08,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 16:35:08,754 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:35:08,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:35:08,754 INFO L85 PathProgramCache]: Analyzing trace with hash -162522153, now seen corresponding path program 5 times [2024-06-21 16:35:08,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:35:08,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613604690] [2024-06-21 16:35:08,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:35:08,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:35:08,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:35:09,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:35:09,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:35:09,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613604690] [2024-06-21 16:35:09,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613604690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:35:09,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:35:09,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:35:09,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667617712] [2024-06-21 16:35:09,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:35:09,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:35:09,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:35:09,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:35:09,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:35:09,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:35:09,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 418 transitions, 4399 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:35:09,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:35:09,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:35:09,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:35:10,955 INFO L124 PetriNetUnfolderBase]: 3814/5710 cut-off events. [2024-06-21 16:35:10,955 INFO L125 PetriNetUnfolderBase]: For 982369/982372 co-relation queries the response was YES. [2024-06-21 16:35:11,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50969 conditions, 5710 events. 3814/5710 cut-off events. For 982369/982372 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 30372 event pairs, 858 based on Foata normal form. 8/5716 useless extension candidates. Maximal degree in co-relation 50820. Up to 5375 conditions per place. [2024-06-21 16:35:11,043 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 356 selfloop transitions, 83 changer transitions 0/442 dead transitions. [2024-06-21 16:35:11,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 442 transitions, 5436 flow [2024-06-21 16:35:11,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:35:11,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:35:11,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-21 16:35:11,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-21 16:35:11,044 INFO L175 Difference]: Start difference. First operand has 310 places, 418 transitions, 4399 flow. Second operand 9 states and 148 transitions. [2024-06-21 16:35:11,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 442 transitions, 5436 flow [2024-06-21 16:35:12,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 442 transitions, 5263 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 16:35:12,861 INFO L231 Difference]: Finished difference. Result has 311 places, 423 transitions, 4501 flow [2024-06-21 16:35:12,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4226, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4501, PETRI_PLACES=311, PETRI_TRANSITIONS=423} [2024-06-21 16:35:12,861 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 269 predicate places. [2024-06-21 16:35:12,861 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 423 transitions, 4501 flow [2024-06-21 16:35:12,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:35:12,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:35:12,862 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 16:35:12,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 16:35:12,862 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:35:12,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:35:12,862 INFO L85 PathProgramCache]: Analyzing trace with hash -162532693, now seen corresponding path program 4 times [2024-06-21 16:35:12,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:35:12,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128643752] [2024-06-21 16:35:12,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:35:12,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:35:12,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:35:13,647 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 16:35:13,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:35:13,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128643752] [2024-06-21 16:35:13,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128643752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:35:13,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:35:13,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:35:13,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315345089] [2024-06-21 16:35:13,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:35:13,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:35:13,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:35:13,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:35:13,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:35:13,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:35:13,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 423 transitions, 4501 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:35:13,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:35:13,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:35:13,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:35:14,967 INFO L124 PetriNetUnfolderBase]: 3804/5696 cut-off events. [2024-06-21 16:35:14,967 INFO L125 PetriNetUnfolderBase]: For 973221/973224 co-relation queries the response was YES. [2024-06-21 16:35:15,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50819 conditions, 5696 events. 3804/5696 cut-off events. For 973221/973224 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 30241 event pairs, 884 based on Foata normal form. 6/5700 useless extension candidates. Maximal degree in co-relation 50669. Up to 5622 conditions per place. [2024-06-21 16:35:15,060 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 396 selfloop transitions, 38 changer transitions 0/437 dead transitions. [2024-06-21 16:35:15,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 437 transitions, 5408 flow [2024-06-21 16:35:15,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:35:15,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:35:15,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-21 16:35:15,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3712737127371274 [2024-06-21 16:35:15,061 INFO L175 Difference]: Start difference. First operand has 311 places, 423 transitions, 4501 flow. Second operand 9 states and 137 transitions. [2024-06-21 16:35:15,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 437 transitions, 5408 flow [2024-06-21 16:35:17,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 437 transitions, 5160 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-21 16:35:17,136 INFO L231 Difference]: Finished difference. Result has 313 places, 424 transitions, 4346 flow [2024-06-21 16:35:17,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4253, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4346, PETRI_PLACES=313, PETRI_TRANSITIONS=424} [2024-06-21 16:35:17,137 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2024-06-21 16:35:17,137 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 424 transitions, 4346 flow [2024-06-21 16:35:17,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:35:17,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:35:17,137 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 16:35:17,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 16:35:17,138 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:35:17,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:35:17,138 INFO L85 PathProgramCache]: Analyzing trace with hash -162176193, now seen corresponding path program 6 times [2024-06-21 16:35:17,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:35:17,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131811114] [2024-06-21 16:35:17,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:35:17,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:35:17,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:35:17,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:35:17,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:35:17,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131811114] [2024-06-21 16:35:17,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131811114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:35:17,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:35:17,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:35:17,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637263453] [2024-06-21 16:35:17,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:35:17,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:35:17,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:35:17,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:35:17,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:35:18,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:35:18,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 424 transitions, 4346 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:35:18,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:35:18,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:35:18,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:35:19,358 INFO L124 PetriNetUnfolderBase]: 3834/5738 cut-off events. [2024-06-21 16:35:19,358 INFO L125 PetriNetUnfolderBase]: For 1001904/1001907 co-relation queries the response was YES. [2024-06-21 16:35:19,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50913 conditions, 5738 events. 3834/5738 cut-off events. For 1001904/1001907 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 30499 event pairs, 868 based on Foata normal form. 8/5744 useless extension candidates. Maximal degree in co-relation 50762. Up to 5403 conditions per place. [2024-06-21 16:35:19,427 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 370 selfloop transitions, 75 changer transitions 0/448 dead transitions. [2024-06-21 16:35:19,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 448 transitions, 5405 flow [2024-06-21 16:35:19,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:35:19,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:35:19,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-21 16:35:19,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-21 16:35:19,428 INFO L175 Difference]: Start difference. First operand has 313 places, 424 transitions, 4346 flow. Second operand 9 states and 148 transitions. [2024-06-21 16:35:19,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 448 transitions, 5405 flow [2024-06-21 16:35:21,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 448 transitions, 5319 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 16:35:21,666 INFO L231 Difference]: Finished difference. Result has 315 places, 429 transitions, 4529 flow [2024-06-21 16:35:21,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4260, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4529, PETRI_PLACES=315, PETRI_TRANSITIONS=429} [2024-06-21 16:35:21,667 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 273 predicate places. [2024-06-21 16:35:21,667 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 429 transitions, 4529 flow [2024-06-21 16:35:21,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:35:21,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:35:21,668 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 16:35:21,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 16:35:21,668 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:35:21,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:35:21,668 INFO L85 PathProgramCache]: Analyzing trace with hash -162532383, now seen corresponding path program 7 times [2024-06-21 16:35:21,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:35:21,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84158934] [2024-06-21 16:35:21,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:35:21,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:35:21,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:35:22,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:35:22,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:35:22,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84158934] [2024-06-21 16:35:22,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84158934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:35:22,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:35:22,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:35:22,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996110917] [2024-06-21 16:35:22,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:35:22,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:35:22,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:35:22,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:35:22,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:35:22,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:35:22,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 429 transitions, 4529 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:35:22,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:35:22,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:35:22,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:35:23,737 INFO L124 PetriNetUnfolderBase]: 3844/5752 cut-off events. [2024-06-21 16:35:23,737 INFO L125 PetriNetUnfolderBase]: For 1002414/1002417 co-relation queries the response was YES. [2024-06-21 16:35:23,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51527 conditions, 5752 events. 3844/5752 cut-off events. For 1002414/1002417 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 30576 event pairs, 854 based on Foata normal form. 4/5754 useless extension candidates. Maximal degree in co-relation 51375. Up to 5353 conditions per place. [2024-06-21 16:35:23,816 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 351 selfloop transitions, 101 changer transitions 0/455 dead transitions. [2024-06-21 16:35:23,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 455 transitions, 5801 flow [2024-06-21 16:35:23,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:35:23,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:35:23,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-21 16:35:23,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-21 16:35:23,818 INFO L175 Difference]: Start difference. First operand has 315 places, 429 transitions, 4529 flow. Second operand 10 states and 165 transitions. [2024-06-21 16:35:23,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 455 transitions, 5801 flow [2024-06-21 16:35:26,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 455 transitions, 5581 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-21 16:35:26,158 INFO L231 Difference]: Finished difference. Result has 318 places, 433 transitions, 4616 flow [2024-06-21 16:35:26,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4309, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4616, PETRI_PLACES=318, PETRI_TRANSITIONS=433} [2024-06-21 16:35:26,158 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-21 16:35:26,159 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 433 transitions, 4616 flow [2024-06-21 16:35:26,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:35:26,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:35:26,159 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 16:35:26,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 16:35:26,159 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:35:26,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:35:26,160 INFO L85 PathProgramCache]: Analyzing trace with hash 237321117, now seen corresponding path program 8 times [2024-06-21 16:35:26,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:35:26,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350727621] [2024-06-21 16:35:26,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:35:26,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:35:26,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:35:26,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:35:26,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:35:26,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350727621] [2024-06-21 16:35:26,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350727621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:35:26,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:35:26,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:35:26,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287748123] [2024-06-21 16:35:26,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:35:26,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:35:26,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:35:26,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:35:26,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:35:26,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:35:26,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 433 transitions, 4616 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:35:26,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:35:26,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:35:26,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:35:28,184 INFO L124 PetriNetUnfolderBase]: 3838/5744 cut-off events. [2024-06-21 16:35:28,185 INFO L125 PetriNetUnfolderBase]: For 1010683/1010686 co-relation queries the response was YES. [2024-06-21 16:35:28,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51388 conditions, 5744 events. 3838/5744 cut-off events. For 1010683/1010686 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 30518 event pairs, 874 based on Foata normal form. 4/5746 useless extension candidates. Maximal degree in co-relation 51235. Up to 5665 conditions per place. [2024-06-21 16:35:28,270 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 416 selfloop transitions, 45 changer transitions 0/464 dead transitions. [2024-06-21 16:35:28,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 464 transitions, 5789 flow [2024-06-21 16:35:28,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:35:28,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:35:28,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-21 16:35:28,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3712737127371274 [2024-06-21 16:35:28,271 INFO L175 Difference]: Start difference. First operand has 318 places, 433 transitions, 4616 flow. Second operand 9 states and 137 transitions. [2024-06-21 16:35:28,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 464 transitions, 5789 flow [2024-06-21 16:35:30,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 464 transitions, 5468 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-21 16:35:30,593 INFO L231 Difference]: Finished difference. Result has 321 places, 451 transitions, 4667 flow [2024-06-21 16:35:30,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4327, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4667, PETRI_PLACES=321, PETRI_TRANSITIONS=451} [2024-06-21 16:35:30,594 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 279 predicate places. [2024-06-21 16:35:30,594 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 451 transitions, 4667 flow [2024-06-21 16:35:30,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:35:30,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:35:30,594 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 16:35:30,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 16:35:30,594 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:35:30,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:35:30,595 INFO L85 PathProgramCache]: Analyzing trace with hash 251143149, now seen corresponding path program 1 times [2024-06-21 16:35:30,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:35:30,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68239742] [2024-06-21 16:35:30,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:35:30,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:35:30,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:35:31,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:35:31,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:35:31,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68239742] [2024-06-21 16:35:31,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68239742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:35:31,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:35:31,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:35:31,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406820217] [2024-06-21 16:35:31,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:35:31,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:35:31,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:35:31,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:35:31,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:35:31,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:35:31,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 451 transitions, 4667 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:35:31,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:35:31,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:35:31,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:35:32,658 INFO L124 PetriNetUnfolderBase]: 3848/5776 cut-off events. [2024-06-21 16:35:32,658 INFO L125 PetriNetUnfolderBase]: For 1032916/1032919 co-relation queries the response was YES. [2024-06-21 16:35:32,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51342 conditions, 5776 events. 3848/5776 cut-off events. For 1032916/1032919 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 30997 event pairs, 1485 based on Foata normal form. 6/5780 useless extension candidates. Maximal degree in co-relation 51186. Up to 5618 conditions per place. [2024-06-21 16:35:32,740 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 424 selfloop transitions, 50 changer transitions 0/477 dead transitions. [2024-06-21 16:35:32,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 477 transitions, 6087 flow [2024-06-21 16:35:32,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:35:32,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:35:32,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 150 transitions. [2024-06-21 16:35:32,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-21 16:35:32,742 INFO L175 Difference]: Start difference. First operand has 321 places, 451 transitions, 4667 flow. Second operand 10 states and 150 transitions. [2024-06-21 16:35:32,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 477 transitions, 6087 flow [2024-06-21 16:35:35,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 477 transitions, 5970 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-21 16:35:35,718 INFO L231 Difference]: Finished difference. Result has 329 places, 461 transitions, 4879 flow [2024-06-21 16:35:35,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4551, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4879, PETRI_PLACES=329, PETRI_TRANSITIONS=461} [2024-06-21 16:35:35,719 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 287 predicate places. [2024-06-21 16:35:35,719 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 461 transitions, 4879 flow [2024-06-21 16:35:35,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:35:35,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:35:35,719 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 16:35:35,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 16:35:35,720 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:35:35,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:35:35,720 INFO L85 PathProgramCache]: Analyzing trace with hash 251618813, now seen corresponding path program 1 times [2024-06-21 16:35:35,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:35:35,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325820179] [2024-06-21 16:35:35,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:35:35,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:35:35,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:35:36,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:35:36,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:35:36,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325820179] [2024-06-21 16:35:36,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325820179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:35:36,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:35:36,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:35:36,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113625979] [2024-06-21 16:35:36,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:35:36,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:35:36,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:35:36,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:35:36,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:35:36,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:35:36,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 461 transitions, 4879 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:35:36,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:35:36,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:35:36,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:35:38,208 INFO L124 PetriNetUnfolderBase]: 3843/5768 cut-off events. [2024-06-21 16:35:38,208 INFO L125 PetriNetUnfolderBase]: For 1034995/1034995 co-relation queries the response was YES. [2024-06-21 16:35:38,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51840 conditions, 5768 events. 3843/5768 cut-off events. For 1034995/1034995 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 30880 event pairs, 1488 based on Foata normal form. 1/5768 useless extension candidates. Maximal degree in co-relation 51680. Up to 5718 conditions per place. [2024-06-21 16:35:38,288 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 449 selfloop transitions, 23 changer transitions 0/475 dead transitions. [2024-06-21 16:35:38,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 475 transitions, 5944 flow [2024-06-21 16:35:38,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:35:38,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:35:38,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-21 16:35:38,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-21 16:35:38,290 INFO L175 Difference]: Start difference. First operand has 329 places, 461 transitions, 4879 flow. Second operand 8 states and 120 transitions. [2024-06-21 16:35:38,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 475 transitions, 5944 flow [2024-06-21 16:35:41,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 475 transitions, 5792 flow, removed 63 selfloop flow, removed 3 redundant places. [2024-06-21 16:35:41,864 INFO L231 Difference]: Finished difference. Result has 334 places, 464 transitions, 4882 flow [2024-06-21 16:35:41,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4739, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4882, PETRI_PLACES=334, PETRI_TRANSITIONS=464} [2024-06-21 16:35:41,864 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 292 predicate places. [2024-06-21 16:35:41,864 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 464 transitions, 4882 flow [2024-06-21 16:35:41,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:35:41,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:35:41,865 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 16:35:41,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 16:35:41,865 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:35:41,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:35:41,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1472121027, now seen corresponding path program 1 times [2024-06-21 16:35:41,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:35:41,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723796640] [2024-06-21 16:35:41,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:35:41,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:35:41,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:35:42,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:35:42,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:35:42,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723796640] [2024-06-21 16:35:42,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723796640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:35:42,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:35:42,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:35:42,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354608503] [2024-06-21 16:35:42,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:35:42,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:35:42,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:35:42,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:35:42,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:35:42,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:35:42,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 464 transitions, 4882 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:35:42,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:35:42,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:35:42,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:35:44,417 INFO L124 PetriNetUnfolderBase]: 3864/5799 cut-off events. [2024-06-21 16:35:44,417 INFO L125 PetriNetUnfolderBase]: For 1072611/1072611 co-relation queries the response was YES. [2024-06-21 16:35:44,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52298 conditions, 5799 events. 3864/5799 cut-off events. For 1072611/1072611 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 31029 event pairs, 1447 based on Foata normal form. 2/5800 useless extension candidates. Maximal degree in co-relation 52135. Up to 5700 conditions per place. [2024-06-21 16:35:44,490 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 463 selfloop transitions, 25 changer transitions 0/491 dead transitions. [2024-06-21 16:35:44,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 491 transitions, 6218 flow [2024-06-21 16:35:44,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:35:44,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:35:44,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-21 16:35:44,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-21 16:35:44,491 INFO L175 Difference]: Start difference. First operand has 334 places, 464 transitions, 4882 flow. Second operand 9 states and 143 transitions. [2024-06-21 16:35:44,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 491 transitions, 6218 flow [2024-06-21 16:35:47,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 491 transitions, 6095 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-21 16:35:47,689 INFO L231 Difference]: Finished difference. Result has 336 places, 468 transitions, 4914 flow [2024-06-21 16:35:47,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4759, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4914, PETRI_PLACES=336, PETRI_TRANSITIONS=468} [2024-06-21 16:35:47,689 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 294 predicate places. [2024-06-21 16:35:47,689 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 468 transitions, 4914 flow [2024-06-21 16:35:47,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:35:47,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:35:47,690 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 16:35:47,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 16:35:47,690 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:35:47,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:35:47,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1465853351, now seen corresponding path program 2 times [2024-06-21 16:35:47,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:35:47,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703579584] [2024-06-21 16:35:47,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:35:47,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:35:47,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:35:48,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:35:48,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:35:48,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703579584] [2024-06-21 16:35:48,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703579584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:35:48,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:35:48,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:35:48,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364042674] [2024-06-21 16:35:48,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:35:48,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:35:48,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:35:48,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:35:48,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:35:48,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:35:48,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 468 transitions, 4914 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:35:48,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:35:48,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:35:48,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:35:50,001 INFO L124 PetriNetUnfolderBase]: 3859/5792 cut-off events. [2024-06-21 16:35:50,002 INFO L125 PetriNetUnfolderBase]: For 1081623/1081623 co-relation queries the response was YES. [2024-06-21 16:35:50,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52121 conditions, 5792 events. 3859/5792 cut-off events. For 1081623/1081623 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 31051 event pairs, 1488 based on Foata normal form. 2/5793 useless extension candidates. Maximal degree in co-relation 51958. Up to 5722 conditions per place. [2024-06-21 16:35:50,084 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 461 selfloop transitions, 21 changer transitions 0/485 dead transitions. [2024-06-21 16:35:50,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 485 transitions, 5920 flow [2024-06-21 16:35:50,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:35:50,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:35:50,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-21 16:35:50,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-21 16:35:50,085 INFO L175 Difference]: Start difference. First operand has 336 places, 468 transitions, 4914 flow. Second operand 8 states and 126 transitions. [2024-06-21 16:35:50,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 485 transitions, 5920 flow [2024-06-21 16:35:53,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 485 transitions, 5786 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-21 16:35:53,342 INFO L231 Difference]: Finished difference. Result has 339 places, 468 transitions, 4827 flow [2024-06-21 16:35:53,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4780, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4827, PETRI_PLACES=339, PETRI_TRANSITIONS=468} [2024-06-21 16:35:53,342 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 297 predicate places. [2024-06-21 16:35:53,342 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 468 transitions, 4827 flow [2024-06-21 16:35:53,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:35:53,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:35:53,343 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 16:35:53,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 16:35:53,343 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:35:53,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:35:53,344 INFO L85 PathProgramCache]: Analyzing trace with hash -2093379579, now seen corresponding path program 3 times [2024-06-21 16:35:53,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:35:53,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181780811] [2024-06-21 16:35:53,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:35:53,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:35:53,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:35:54,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:35:54,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:35:54,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181780811] [2024-06-21 16:35:54,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181780811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:35:54,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:35:54,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:35:54,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714955195] [2024-06-21 16:35:54,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:35:54,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:35:54,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:35:54,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:35:54,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:35:54,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:35:54,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 468 transitions, 4827 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:35:54,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:35:54,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:35:54,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:35:55,640 INFO L124 PetriNetUnfolderBase]: 3867/5804 cut-off events. [2024-06-21 16:35:55,640 INFO L125 PetriNetUnfolderBase]: For 1101574/1101574 co-relation queries the response was YES. [2024-06-21 16:35:55,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52215 conditions, 5804 events. 3867/5804 cut-off events. For 1101574/1101574 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 31087 event pairs, 1489 based on Foata normal form. 2/5805 useless extension candidates. Maximal degree in co-relation 52050. Up to 5713 conditions per place. [2024-06-21 16:35:55,730 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 444 selfloop transitions, 37 changer transitions 0/484 dead transitions. [2024-06-21 16:35:55,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 484 transitions, 5875 flow [2024-06-21 16:35:55,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:35:55,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:35:55,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-21 16:35:55,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-21 16:35:55,732 INFO L175 Difference]: Start difference. First operand has 339 places, 468 transitions, 4827 flow. Second operand 8 states and 128 transitions. [2024-06-21 16:35:55,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 484 transitions, 5875 flow [2024-06-21 16:35:58,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 484 transitions, 5828 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 16:35:58,386 INFO L231 Difference]: Finished difference. Result has 340 places, 470 transitions, 4915 flow [2024-06-21 16:35:58,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4780, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4915, PETRI_PLACES=340, PETRI_TRANSITIONS=470} [2024-06-21 16:35:58,387 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 298 predicate places. [2024-06-21 16:35:58,387 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 470 transitions, 4915 flow [2024-06-21 16:35:58,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:35:58,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:35:58,388 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 16:35:58,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 16:35:58,388 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:35:58,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:35:58,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1246942951, now seen corresponding path program 4 times [2024-06-21 16:35:58,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:35:58,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716786661] [2024-06-21 16:35:58,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:35:58,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:35:58,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:35:59,234 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 16:35:59,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:35:59,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716786661] [2024-06-21 16:35:59,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716786661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:35:59,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:35:59,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:35:59,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165931505] [2024-06-21 16:35:59,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:35:59,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:35:59,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:35:59,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:35:59,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:35:59,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:35:59,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 470 transitions, 4915 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:35:59,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:35:59,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:35:59,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:36:00,656 INFO L124 PetriNetUnfolderBase]: 3862/5799 cut-off events. [2024-06-21 16:36:00,656 INFO L125 PetriNetUnfolderBase]: For 1109376/1109379 co-relation queries the response was YES. [2024-06-21 16:36:00,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52277 conditions, 5799 events. 3862/5799 cut-off events. For 1109376/1109379 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 31097 event pairs, 1499 based on Foata normal form. 2/5798 useless extension candidates. Maximal degree in co-relation 52111. Up to 5706 conditions per place. [2024-06-21 16:36:00,742 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 443 selfloop transitions, 37 changer transitions 0/483 dead transitions. [2024-06-21 16:36:00,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 483 transitions, 5957 flow [2024-06-21 16:36:00,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:36:00,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:36:00,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-21 16:36:00,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38109756097560976 [2024-06-21 16:36:00,743 INFO L175 Difference]: Start difference. First operand has 340 places, 470 transitions, 4915 flow. Second operand 8 states and 125 transitions. [2024-06-21 16:36:00,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 483 transitions, 5957 flow [2024-06-21 16:36:03,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 483 transitions, 5838 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 16:36:03,477 INFO L231 Difference]: Finished difference. Result has 342 places, 472 transitions, 4935 flow [2024-06-21 16:36:03,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4796, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4935, PETRI_PLACES=342, PETRI_TRANSITIONS=472} [2024-06-21 16:36:03,478 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 300 predicate places. [2024-06-21 16:36:03,478 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 472 transitions, 4935 flow [2024-06-21 16:36:03,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:36:03,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:36:03,478 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 16:36:03,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 16:36:03,478 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:36:03,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:36:03,479 INFO L85 PathProgramCache]: Analyzing trace with hash 907537360, now seen corresponding path program 1 times [2024-06-21 16:36:03,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:36:03,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908224547] [2024-06-21 16:36:03,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:36:03,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:36:03,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:36:04,026 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 16:36:04,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:36:04,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908224547] [2024-06-21 16:36:04,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908224547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:36:04,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:36:04,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:36:04,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032484607] [2024-06-21 16:36:04,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:36:04,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:36:04,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:36:04,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:36:04,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:36:04,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:36:04,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 472 transitions, 4935 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 16:36:04,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:36:04,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:36:04,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:36:05,603 INFO L124 PetriNetUnfolderBase]: 4138/6193 cut-off events. [2024-06-21 16:36:05,603 INFO L125 PetriNetUnfolderBase]: For 1136192/1136211 co-relation queries the response was YES. [2024-06-21 16:36:05,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55924 conditions, 6193 events. 4138/6193 cut-off events. For 1136192/1136211 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 33286 event pairs, 855 based on Foata normal form. 19/6210 useless extension candidates. Maximal degree in co-relation 55757. Up to 5720 conditions per place. [2024-06-21 16:36:05,700 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 474 selfloop transitions, 116 changer transitions 0/593 dead transitions. [2024-06-21 16:36:05,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 593 transitions, 8029 flow [2024-06-21 16:36:05,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:36:05,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:36:05,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 16:36:05,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 16:36:05,702 INFO L175 Difference]: Start difference. First operand has 342 places, 472 transitions, 4935 flow. Second operand 9 states and 164 transitions. [2024-06-21 16:36:05,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 593 transitions, 8029 flow [2024-06-21 16:36:08,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 593 transitions, 7906 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 16:36:08,526 INFO L231 Difference]: Finished difference. Result has 349 places, 540 transitions, 6039 flow [2024-06-21 16:36:08,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4812, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6039, PETRI_PLACES=349, PETRI_TRANSITIONS=540} [2024-06-21 16:36:08,526 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 307 predicate places. [2024-06-21 16:36:08,526 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 540 transitions, 6039 flow [2024-06-21 16:36:08,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 16:36:08,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:36:08,527 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 16:36:08,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 16:36:08,527 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:36:08,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:36:08,527 INFO L85 PathProgramCache]: Analyzing trace with hash 104917782, now seen corresponding path program 2 times [2024-06-21 16:36:08,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:36:08,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098209852] [2024-06-21 16:36:08,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:36:08,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:36:08,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:36:08,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:36:08,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:36:08,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098209852] [2024-06-21 16:36:08,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098209852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:36:08,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:36:08,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:36:08,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749762995] [2024-06-21 16:36:08,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:36:08,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:36:08,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:36:08,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:36:08,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:36:09,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:36:09,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 540 transitions, 6039 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 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 16:36:09,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:36:09,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:36:09,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:36:10,648 INFO L124 PetriNetUnfolderBase]: 4143/6200 cut-off events. [2024-06-21 16:36:10,648 INFO L125 PetriNetUnfolderBase]: For 1160060/1160079 co-relation queries the response was YES. [2024-06-21 16:36:10,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57606 conditions, 6200 events. 4143/6200 cut-off events. For 1160060/1160079 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 33306 event pairs, 870 based on Foata normal form. 19/6217 useless extension candidates. Maximal degree in co-relation 57434. Up to 5726 conditions per place. [2024-06-21 16:36:10,732 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 468 selfloop transitions, 121 changer transitions 0/592 dead transitions. [2024-06-21 16:36:10,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 592 transitions, 8377 flow [2024-06-21 16:36:10,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:36:10,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:36:10,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 16:36:10,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-21 16:36:10,734 INFO L175 Difference]: Start difference. First operand has 349 places, 540 transitions, 6039 flow. Second operand 8 states and 149 transitions. [2024-06-21 16:36:10,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 592 transitions, 8377 flow [2024-06-21 16:36:14,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 592 transitions, 8266 flow, removed 48 selfloop flow, removed 2 redundant places. [2024-06-21 16:36:14,129 INFO L231 Difference]: Finished difference. Result has 356 places, 546 transitions, 6326 flow [2024-06-21 16:36:14,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5944, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6326, PETRI_PLACES=356, PETRI_TRANSITIONS=546} [2024-06-21 16:36:14,129 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 314 predicate places. [2024-06-21 16:36:14,129 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 546 transitions, 6326 flow [2024-06-21 16:36:14,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 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 16:36:14,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:36:14,130 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 16:36:14,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 16:36:14,130 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:36:14,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:36:14,130 INFO L85 PathProgramCache]: Analyzing trace with hash 121212312, now seen corresponding path program 3 times [2024-06-21 16:36:14,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:36:14,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019707360] [2024-06-21 16:36:14,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:36:14,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:36:14,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:36:14,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:36:14,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:36:14,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019707360] [2024-06-21 16:36:14,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019707360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:36:14,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:36:14,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:36:14,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099913498] [2024-06-21 16:36:14,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:36:14,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:36:14,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:36:14,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:36:14,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:36:14,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:36:14,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 546 transitions, 6326 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 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 16:36:14,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:36:14,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:36:14,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:36:16,301 INFO L124 PetriNetUnfolderBase]: 4140/6197 cut-off events. [2024-06-21 16:36:16,302 INFO L125 PetriNetUnfolderBase]: For 1174517/1174536 co-relation queries the response was YES. [2024-06-21 16:36:16,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58023 conditions, 6197 events. 4140/6197 cut-off events. For 1174517/1174536 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 33326 event pairs, 871 based on Foata normal form. 19/6214 useless extension candidates. Maximal degree in co-relation 57848. Up to 5723 conditions per place. [2024-06-21 16:36:16,404 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 463 selfloop transitions, 123 changer transitions 0/589 dead transitions. [2024-06-21 16:36:16,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 589 transitions, 8347 flow [2024-06-21 16:36:16,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:36:16,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:36:16,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 16:36:16,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 16:36:16,405 INFO L175 Difference]: Start difference. First operand has 356 places, 546 transitions, 6326 flow. Second operand 8 states and 144 transitions. [2024-06-21 16:36:16,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 589 transitions, 8347 flow [2024-06-21 16:36:19,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 589 transitions, 8123 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 16:36:19,091 INFO L231 Difference]: Finished difference. Result has 360 places, 555 transitions, 6552 flow [2024-06-21 16:36:19,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6105, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6552, PETRI_PLACES=360, PETRI_TRANSITIONS=555} [2024-06-21 16:36:19,092 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 318 predicate places. [2024-06-21 16:36:19,092 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 555 transitions, 6552 flow [2024-06-21 16:36:19,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 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 16:36:19,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:36:19,092 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 16:36:19,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 16:36:19,092 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:36:19,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:36:19,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1386009109, now seen corresponding path program 1 times [2024-06-21 16:36:19,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:36:19,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402801269] [2024-06-21 16:36:19,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:36:19,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:36:19,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:36:19,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:36:19,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:36:19,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402801269] [2024-06-21 16:36:19,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402801269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:36:19,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:36:19,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:36:19,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760287688] [2024-06-21 16:36:19,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:36:19,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:36:19,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:36:19,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:36:19,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:36:19,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:36:19,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 555 transitions, 6552 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:36:19,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:36:19,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:36:19,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:36:21,324 INFO L124 PetriNetUnfolderBase]: 4321/6467 cut-off events. [2024-06-21 16:36:21,324 INFO L125 PetriNetUnfolderBase]: For 1242404/1242433 co-relation queries the response was YES. [2024-06-21 16:36:21,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60671 conditions, 6467 events. 4321/6467 cut-off events. For 1242404/1242433 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 35135 event pairs, 869 based on Foata normal form. 32/6497 useless extension candidates. Maximal degree in co-relation 60494. Up to 5552 conditions per place. [2024-06-21 16:36:21,426 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 468 selfloop transitions, 222 changer transitions 0/693 dead transitions. [2024-06-21 16:36:21,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 693 transitions, 9506 flow [2024-06-21 16:36:21,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:36:21,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:36:21,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-21 16:36:21,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-21 16:36:21,427 INFO L175 Difference]: Start difference. First operand has 360 places, 555 transitions, 6552 flow. Second operand 10 states and 185 transitions. [2024-06-21 16:36:21,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 693 transitions, 9506 flow [2024-06-21 16:36:24,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 693 transitions, 9376 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 16:36:24,775 INFO L231 Difference]: Finished difference. Result has 371 places, 636 transitions, 8035 flow [2024-06-21 16:36:24,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6434, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8035, PETRI_PLACES=371, PETRI_TRANSITIONS=636} [2024-06-21 16:36:24,776 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 329 predicate places. [2024-06-21 16:36:24,776 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 636 transitions, 8035 flow [2024-06-21 16:36:24,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:36:24,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:36:24,776 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 16:36:24,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 16:36:24,777 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:36:24,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:36:24,777 INFO L85 PathProgramCache]: Analyzing trace with hash 2080543087, now seen corresponding path program 2 times [2024-06-21 16:36:24,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:36:24,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778256469] [2024-06-21 16:36:24,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:36:24,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:36:24,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:36:25,579 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 16:36:25,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:36:25,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778256469] [2024-06-21 16:36:25,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778256469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:36:25,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:36:25,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:36:25,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578029448] [2024-06-21 16:36:25,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:36:25,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:36:25,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:36:25,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:36:25,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:36:25,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:36:25,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 636 transitions, 8035 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:36:25,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:36:25,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:36:25,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:36:27,766 INFO L124 PetriNetUnfolderBase]: 5084/7593 cut-off events. [2024-06-21 16:36:27,766 INFO L125 PetriNetUnfolderBase]: For 1486728/1486755 co-relation queries the response was YES. [2024-06-21 16:36:27,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73636 conditions, 7593 events. 5084/7593 cut-off events. For 1486728/1486755 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 42374 event pairs, 1160 based on Foata normal form. 30/7621 useless extension candidates. Maximal degree in co-relation 73454. Up to 6290 conditions per place. [2024-06-21 16:36:27,898 INFO L140 encePairwiseOnDemand]: 25/41 looper letters, 601 selfloop transitions, 257 changer transitions 0/861 dead transitions. [2024-06-21 16:36:27,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 861 transitions, 12439 flow [2024-06-21 16:36:27,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:36:27,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:36:27,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-21 16:36:27,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722838137472284 [2024-06-21 16:36:27,900 INFO L175 Difference]: Start difference. First operand has 371 places, 636 transitions, 8035 flow. Second operand 11 states and 213 transitions. [2024-06-21 16:36:27,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 861 transitions, 12439 flow [2024-06-21 16:36:33,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 861 transitions, 12198 flow, removed 109 selfloop flow, removed 2 redundant places. [2024-06-21 16:36:33,246 INFO L231 Difference]: Finished difference. Result has 387 places, 798 transitions, 10771 flow [2024-06-21 16:36:33,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7902, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10771, PETRI_PLACES=387, PETRI_TRANSITIONS=798} [2024-06-21 16:36:33,246 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 345 predicate places. [2024-06-21 16:36:33,247 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 798 transitions, 10771 flow [2024-06-21 16:36:33,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:36:33,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:36:33,247 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 16:36:33,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 16:36:33,247 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:36:33,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:36:33,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1834387817, now seen corresponding path program 3 times [2024-06-21 16:36:33,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:36:33,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288378934] [2024-06-21 16:36:33,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:36:33,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:36:33,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:36:33,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:36:33,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:36:33,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288378934] [2024-06-21 16:36:33,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288378934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:36:33,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:36:33,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:36:33,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755891210] [2024-06-21 16:36:33,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:36:33,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:36:33,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:36:33,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:36:33,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:36:33,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:36:33,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 798 transitions, 10771 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:36:33,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:36:33,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:36:33,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:36:36,007 INFO L124 PetriNetUnfolderBase]: 5239/7833 cut-off events. [2024-06-21 16:36:36,007 INFO L125 PetriNetUnfolderBase]: For 1535521/1535552 co-relation queries the response was YES. [2024-06-21 16:36:36,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78600 conditions, 7833 events. 5239/7833 cut-off events. For 1535521/1535552 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 43930 event pairs, 994 based on Foata normal form. 34/7865 useless extension candidates. Maximal degree in co-relation 78409. Up to 6238 conditions per place. [2024-06-21 16:36:36,173 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 534 selfloop transitions, 337 changer transitions 0/874 dead transitions. [2024-06-21 16:36:36,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 874 transitions, 13730 flow [2024-06-21 16:36:36,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:36:36,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:36:36,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-21 16:36:36,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44146341463414634 [2024-06-21 16:36:36,174 INFO L175 Difference]: Start difference. First operand has 387 places, 798 transitions, 10771 flow. Second operand 10 states and 181 transitions. [2024-06-21 16:36:36,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 874 transitions, 13730 flow [2024-06-21 16:36:41,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 874 transitions, 13590 flow, removed 69 selfloop flow, removed 1 redundant places. [2024-06-21 16:36:41,772 INFO L231 Difference]: Finished difference. Result has 399 places, 828 transitions, 11976 flow [2024-06-21 16:36:41,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10697, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=798, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=310, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11976, PETRI_PLACES=399, PETRI_TRANSITIONS=828} [2024-06-21 16:36:41,772 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 357 predicate places. [2024-06-21 16:36:41,773 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 828 transitions, 11976 flow [2024-06-21 16:36:41,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:36:41,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:36:41,773 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 16:36:41,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 16:36:41,773 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:36:41,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:36:41,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1880510910, now seen corresponding path program 1 times [2024-06-21 16:36:41,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:36:41,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821135070] [2024-06-21 16:36:41,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:36:41,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:36:41,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:36:42,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:36:42,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:36:42,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821135070] [2024-06-21 16:36:42,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821135070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:36:42,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:36:42,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:36:42,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804187703] [2024-06-21 16:36:42,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:36:42,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:36:42,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:36:42,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:36:42,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:36:42,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:36:42,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 828 transitions, 11976 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:36:42,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:36:42,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:36:42,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:36:44,935 INFO L124 PetriNetUnfolderBase]: 5335/7967 cut-off events. [2024-06-21 16:36:44,935 INFO L125 PetriNetUnfolderBase]: For 1583747/1583778 co-relation queries the response was YES. [2024-06-21 16:36:45,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81876 conditions, 7967 events. 5335/7967 cut-off events. For 1583747/1583778 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 44799 event pairs, 1181 based on Foata normal form. 34/7999 useless extension candidates. Maximal degree in co-relation 81679. Up to 6090 conditions per place. [2024-06-21 16:36:45,077 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 468 selfloop transitions, 423 changer transitions 0/894 dead transitions. [2024-06-21 16:36:45,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 894 transitions, 14902 flow [2024-06-21 16:36:45,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:36:45,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:36:45,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-21 16:36:45,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609756097560976 [2024-06-21 16:36:45,078 INFO L175 Difference]: Start difference. First operand has 399 places, 828 transitions, 11976 flow. Second operand 10 states and 189 transitions. [2024-06-21 16:36:45,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 894 transitions, 14902 flow [2024-06-21 16:36:53,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 894 transitions, 14401 flow, removed 69 selfloop flow, removed 5 redundant places. [2024-06-21 16:36:53,022 INFO L231 Difference]: Finished difference. Result has 406 places, 857 transitions, 12869 flow [2024-06-21 16:36:53,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11475, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=828, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=398, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12869, PETRI_PLACES=406, PETRI_TRANSITIONS=857} [2024-06-21 16:36:53,023 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 364 predicate places. [2024-06-21 16:36:53,023 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 857 transitions, 12869 flow [2024-06-21 16:36:53,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:36:53,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:36:53,023 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 16:36:53,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 16:36:53,023 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:36:53,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:36:53,024 INFO L85 PathProgramCache]: Analyzing trace with hash -365862943, now seen corresponding path program 4 times [2024-06-21 16:36:53,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:36:53,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696804804] [2024-06-21 16:36:53,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:36:53,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:36:53,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:36:53,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:36:53,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:36:53,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696804804] [2024-06-21 16:36:53,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696804804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:36:53,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:36:53,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:36:53,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771032189] [2024-06-21 16:36:53,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:36:53,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:36:53,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:36:53,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:36:53,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:36:53,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:36:53,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 857 transitions, 12869 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:36:53,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:36:53,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:36:53,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:36:56,242 INFO L124 PetriNetUnfolderBase]: 5367/8015 cut-off events. [2024-06-21 16:36:56,242 INFO L125 PetriNetUnfolderBase]: For 1639278/1639313 co-relation queries the response was YES. [2024-06-21 16:36:56,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84028 conditions, 8015 events. 5367/8015 cut-off events. For 1639278/1639313 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 45131 event pairs, 1195 based on Foata normal form. 42/8055 useless extension candidates. Maximal degree in co-relation 83828. Up to 7032 conditions per place. [2024-06-21 16:36:56,374 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 626 selfloop transitions, 275 changer transitions 0/904 dead transitions. [2024-06-21 16:36:56,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 904 transitions, 15283 flow [2024-06-21 16:36:56,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:36:56,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:36:56,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-21 16:36:56,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43414634146341463 [2024-06-21 16:36:56,376 INFO L175 Difference]: Start difference. First operand has 406 places, 857 transitions, 12869 flow. Second operand 10 states and 178 transitions. [2024-06-21 16:36:56,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 904 transitions, 15283 flow [2024-06-21 16:37:03,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 904 transitions, 15128 flow, removed 59 selfloop flow, removed 2 redundant places. [2024-06-21 16:37:03,537 INFO L231 Difference]: Finished difference. Result has 414 places, 863 transitions, 13405 flow [2024-06-21 16:37:03,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12714, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=857, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13405, PETRI_PLACES=414, PETRI_TRANSITIONS=863} [2024-06-21 16:37:03,538 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 372 predicate places. [2024-06-21 16:37:03,538 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 863 transitions, 13405 flow [2024-06-21 16:37:03,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:37:03,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:37:03,538 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 16:37:03,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 16:37:03,539 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:37:03,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:37:03,539 INFO L85 PathProgramCache]: Analyzing trace with hash -365872243, now seen corresponding path program 5 times [2024-06-21 16:37:03,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:37:03,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096282444] [2024-06-21 16:37:03,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:37:03,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:37:03,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:37:04,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:37:04,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:37:04,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096282444] [2024-06-21 16:37:04,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096282444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:37:04,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:37:04,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:37:04,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898910124] [2024-06-21 16:37:04,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:37:04,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:37:04,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:37:04,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:37:04,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:37:04,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:37:04,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 863 transitions, 13405 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:37:04,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:37:04,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:37:04,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:37:06,515 INFO L124 PetriNetUnfolderBase]: 5347/7987 cut-off events. [2024-06-21 16:37:06,516 INFO L125 PetriNetUnfolderBase]: For 1613754/1613789 co-relation queries the response was YES. [2024-06-21 16:37:06,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83669 conditions, 7987 events. 5347/7987 cut-off events. For 1613754/1613789 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 45030 event pairs, 1177 based on Foata normal form. 42/8027 useless extension candidates. Maximal degree in co-relation 83467. Up to 6948 conditions per place. [2024-06-21 16:37:06,652 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 619 selfloop transitions, 284 changer transitions 0/906 dead transitions. [2024-06-21 16:37:06,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 906 transitions, 15715 flow [2024-06-21 16:37:06,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:37:06,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:37:06,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-21 16:37:06,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43658536585365854 [2024-06-21 16:37:06,653 INFO L175 Difference]: Start difference. First operand has 414 places, 863 transitions, 13405 flow. Second operand 10 states and 179 transitions. [2024-06-21 16:37:06,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 906 transitions, 15715 flow [2024-06-21 16:37:12,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 906 transitions, 15073 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-21 16:37:12,736 INFO L231 Difference]: Finished difference. Result has 419 places, 864 transitions, 13364 flow [2024-06-21 16:37:12,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12763, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=863, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13364, PETRI_PLACES=419, PETRI_TRANSITIONS=864} [2024-06-21 16:37:12,736 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 377 predicate places. [2024-06-21 16:37:12,736 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 864 transitions, 13364 flow [2024-06-21 16:37:12,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:37:12,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:37:12,737 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 16:37:12,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 16:37:12,737 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:37:12,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:37:12,737 INFO L85 PathProgramCache]: Analyzing trace with hash 98234331, now seen corresponding path program 1 times [2024-06-21 16:37:12,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:37:12,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014907581] [2024-06-21 16:37:12,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:37:12,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:37:12,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:37:13,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:37:13,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:37:13,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014907581] [2024-06-21 16:37:13,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014907581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:37:13,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:37:13,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:37:13,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145914257] [2024-06-21 16:37:13,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:37:13,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:37:13,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:37:13,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:37:13,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:37:13,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:37:13,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 864 transitions, 13364 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 16:37:13,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:37:13,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:37:13,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:37:15,647 INFO L124 PetriNetUnfolderBase]: 5515/8238 cut-off events. [2024-06-21 16:37:15,648 INFO L125 PetriNetUnfolderBase]: For 1598322/1598349 co-relation queries the response was YES. [2024-06-21 16:37:15,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85923 conditions, 8238 events. 5515/8238 cut-off events. For 1598322/1598349 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 46611 event pairs, 1238 based on Foata normal form. 28/8263 useless extension candidates. Maximal degree in co-relation 85719. Up to 7790 conditions per place. [2024-06-21 16:37:15,795 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 857 selfloop transitions, 78 changer transitions 0/938 dead transitions. [2024-06-21 16:37:15,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 938 transitions, 16073 flow [2024-06-21 16:37:15,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:37:15,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:37:15,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 16:37:15,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-21 16:37:15,796 INFO L175 Difference]: Start difference. First operand has 419 places, 864 transitions, 13364 flow. Second operand 9 states and 161 transitions. [2024-06-21 16:37:15,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 938 transitions, 16073 flow [2024-06-21 16:37:20,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 938 transitions, 15499 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 16:37:20,881 INFO L231 Difference]: Finished difference. Result has 423 places, 903 transitions, 13711 flow [2024-06-21 16:37:20,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12794, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=864, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=804, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13711, PETRI_PLACES=423, PETRI_TRANSITIONS=903} [2024-06-21 16:37:20,882 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 381 predicate places. [2024-06-21 16:37:20,882 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 903 transitions, 13711 flow [2024-06-21 16:37:20,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 16:37:20,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:37:20,883 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 16:37:20,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 16:37:20,884 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:37:20,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:37:20,884 INFO L85 PathProgramCache]: Analyzing trace with hash -381694029, now seen corresponding path program 2 times [2024-06-21 16:37:20,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:37:20,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516185374] [2024-06-21 16:37:20,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:37:20,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:37:20,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:37:21,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:37:21,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:37:21,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516185374] [2024-06-21 16:37:21,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516185374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:37:21,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:37:21,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:37:21,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575397859] [2024-06-21 16:37:21,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:37:21,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:37:21,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:37:21,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:37:21,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:37:21,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:37:21,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 903 transitions, 13711 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 16:37:21,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:37:21,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:37:21,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:37:23,998 INFO L124 PetriNetUnfolderBase]: 5663/8444 cut-off events. [2024-06-21 16:37:23,999 INFO L125 PetriNetUnfolderBase]: For 1667308/1667341 co-relation queries the response was YES. [2024-06-21 16:37:24,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88155 conditions, 8444 events. 5663/8444 cut-off events. For 1667308/1667341 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 47944 event pairs, 1237 based on Foata normal form. 34/8475 useless extension candidates. Maximal degree in co-relation 87948. Up to 7620 conditions per place. [2024-06-21 16:37:24,157 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 838 selfloop transitions, 165 changer transitions 0/1006 dead transitions. [2024-06-21 16:37:24,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 1006 transitions, 17514 flow [2024-06-21 16:37:24,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:37:24,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:37:24,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 16:37:24,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-21 16:37:24,158 INFO L175 Difference]: Start difference. First operand has 423 places, 903 transitions, 13711 flow. Second operand 9 states and 168 transitions. [2024-06-21 16:37:24,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 1006 transitions, 17514 flow [2024-06-21 16:37:30,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 1006 transitions, 17449 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-21 16:37:30,795 INFO L231 Difference]: Finished difference. Result has 432 places, 958 transitions, 14768 flow [2024-06-21 16:37:30,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13646, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=903, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=759, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14768, PETRI_PLACES=432, PETRI_TRANSITIONS=958} [2024-06-21 16:37:30,796 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 390 predicate places. [2024-06-21 16:37:30,796 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 958 transitions, 14768 flow [2024-06-21 16:37:30,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 16:37:30,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:37:30,796 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 16:37:30,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 16:37:30,796 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:37:30,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:37:30,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1277165573, now seen corresponding path program 3 times [2024-06-21 16:37:30,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:37:30,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376237117] [2024-06-21 16:37:30,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:37:30,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:37:30,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:37:31,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:37:31,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:37:31,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376237117] [2024-06-21 16:37:31,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376237117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:37:31,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:37:31,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:37:31,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969488520] [2024-06-21 16:37:31,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:37:31,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:37:31,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:37:31,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:37:31,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:37:31,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:37:31,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 958 transitions, 14768 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 16:37:31,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:37:31,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:37:31,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:37:34,651 INFO L124 PetriNetUnfolderBase]: 5805/8649 cut-off events. [2024-06-21 16:37:34,651 INFO L125 PetriNetUnfolderBase]: For 1729267/1729318 co-relation queries the response was YES. [2024-06-21 16:37:34,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92126 conditions, 8649 events. 5805/8649 cut-off events. For 1729267/1729318 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 49093 event pairs, 1201 based on Foata normal form. 52/8698 useless extension candidates. Maximal degree in co-relation 91915. Up to 8091 conditions per place. [2024-06-21 16:37:34,877 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 922 selfloop transitions, 102 changer transitions 0/1027 dead transitions. [2024-06-21 16:37:34,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 1027 transitions, 18060 flow [2024-06-21 16:37:34,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:37:34,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:37:34,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-21 16:37:34,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41685144124168516 [2024-06-21 16:37:34,878 INFO L175 Difference]: Start difference. First operand has 432 places, 958 transitions, 14768 flow. Second operand 11 states and 188 transitions. [2024-06-21 16:37:34,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 1027 transitions, 18060 flow [2024-06-21 16:37:41,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 1027 transitions, 17965 flow, removed 36 selfloop flow, removed 2 redundant places. [2024-06-21 16:37:41,895 INFO L231 Difference]: Finished difference. Result has 444 places, 987 transitions, 15493 flow [2024-06-21 16:37:41,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14685, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=958, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=867, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15493, PETRI_PLACES=444, PETRI_TRANSITIONS=987} [2024-06-21 16:37:41,896 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 402 predicate places. [2024-06-21 16:37:41,896 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 987 transitions, 15493 flow [2024-06-21 16:37:41,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 16:37:41,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:37:41,897 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 16:37:41,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 16:37:41,897 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:37:41,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:37:41,898 INFO L85 PathProgramCache]: Analyzing trace with hash -376153089, now seen corresponding path program 4 times [2024-06-21 16:37:41,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:37:41,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446930212] [2024-06-21 16:37:41,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:37:41,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:37:41,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:37:42,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:37:42,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:37:42,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446930212] [2024-06-21 16:37:42,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446930212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:37:42,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:37:42,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:37:42,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813121946] [2024-06-21 16:37:42,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:37:42,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:37:42,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:37:42,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:37:42,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:37:42,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:37:42,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 987 transitions, 15493 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 16:37:42,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:37:42,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:37:42,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:37:45,642 INFO L124 PetriNetUnfolderBase]: 5799/8641 cut-off events. [2024-06-21 16:37:45,643 INFO L125 PetriNetUnfolderBase]: For 1745128/1745179 co-relation queries the response was YES. [2024-06-21 16:37:45,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92592 conditions, 8641 events. 5799/8641 cut-off events. For 1745128/1745179 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 49057 event pairs, 1206 based on Foata normal form. 52/8690 useless extension candidates. Maximal degree in co-relation 92376. Up to 8086 conditions per place. [2024-06-21 16:37:45,812 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 916 selfloop transitions, 100 changer transitions 0/1019 dead transitions. [2024-06-21 16:37:45,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 1019 transitions, 17957 flow [2024-06-21 16:37:45,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:37:45,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:37:45,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 16:37:45,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-21 16:37:45,814 INFO L175 Difference]: Start difference. First operand has 444 places, 987 transitions, 15493 flow. Second operand 9 states and 158 transitions. [2024-06-21 16:37:45,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 1019 transitions, 17957 flow [2024-06-21 16:37:51,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 1019 transitions, 17758 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-21 16:37:51,917 INFO L231 Difference]: Finished difference. Result has 449 places, 987 transitions, 15501 flow [2024-06-21 16:37:51,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15294, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=987, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=887, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15501, PETRI_PLACES=449, PETRI_TRANSITIONS=987} [2024-06-21 16:37:51,918 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 407 predicate places. [2024-06-21 16:37:51,918 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 987 transitions, 15501 flow [2024-06-21 16:37:51,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 16:37:51,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:37:51,927 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 16:37:51,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 16:37:51,927 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:37:51,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:37:51,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1654912401, now seen corresponding path program 1 times [2024-06-21 16:37:51,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:37:51,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910985653] [2024-06-21 16:37:51,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:37:51,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:37:51,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:37:52,590 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 16:37:52,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:37:52,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910985653] [2024-06-21 16:37:52,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910985653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:37:52,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:37:52,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:37:52,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125914610] [2024-06-21 16:37:52,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:37:52,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:37:52,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:37:52,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:37:52,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:37:52,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:37:52,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 987 transitions, 15501 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:37:52,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:37:52,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:37:52,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:37:55,955 INFO L124 PetriNetUnfolderBase]: 5907/8795 cut-off events. [2024-06-21 16:37:55,955 INFO L125 PetriNetUnfolderBase]: For 1849785/1849836 co-relation queries the response was YES. [2024-06-21 16:37:56,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94226 conditions, 8795 events. 5907/8795 cut-off events. For 1849785/1849836 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 50001 event pairs, 1236 based on Foata normal form. 62/8854 useless extension candidates. Maximal degree in co-relation 94009. Up to 8217 conditions per place. [2024-06-21 16:37:56,141 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 938 selfloop transitions, 95 changer transitions 0/1036 dead transitions. [2024-06-21 16:37:56,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 1036 transitions, 18067 flow [2024-06-21 16:37:56,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:37:56,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:37:56,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-21 16:37:56,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292682926829268 [2024-06-21 16:37:56,143 INFO L175 Difference]: Start difference. First operand has 449 places, 987 transitions, 15501 flow. Second operand 10 states and 176 transitions. [2024-06-21 16:37:56,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 1036 transitions, 18067 flow [2024-06-21 16:38:03,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 1036 transitions, 17894 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 16:38:03,642 INFO L231 Difference]: Finished difference. Result has 454 places, 1000 transitions, 15836 flow [2024-06-21 16:38:03,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15343, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=987, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=896, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15836, PETRI_PLACES=454, PETRI_TRANSITIONS=1000} [2024-06-21 16:38:03,642 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 412 predicate places. [2024-06-21 16:38:03,643 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 1000 transitions, 15836 flow [2024-06-21 16:38:03,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:03,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:03,643 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 16:38:03,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 16:38:03,643 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:38:03,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:03,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1457514321, now seen corresponding path program 5 times [2024-06-21 16:38:03,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:03,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498591850] [2024-06-21 16:38:03,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:03,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:03,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:04,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:38:04,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:04,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498591850] [2024-06-21 16:38:04,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498591850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:04,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:04,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:38:04,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771913093] [2024-06-21 16:38:04,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:04,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:38:04,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:04,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:38:04,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:38:04,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:38:04,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 1000 transitions, 15836 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 16:38:04,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:04,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:38:04,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:07,513 INFO L124 PetriNetUnfolderBase]: 5917/8810 cut-off events. [2024-06-21 16:38:07,513 INFO L125 PetriNetUnfolderBase]: For 1807418/1807469 co-relation queries the response was YES. [2024-06-21 16:38:07,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95124 conditions, 8810 events. 5917/8810 cut-off events. For 1807418/1807469 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 50093 event pairs, 1261 based on Foata normal form. 52/8859 useless extension candidates. Maximal degree in co-relation 94904. Up to 7832 conditions per place. [2024-06-21 16:38:07,695 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 842 selfloop transitions, 201 changer transitions 0/1046 dead transitions. [2024-06-21 16:38:07,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 1046 transitions, 18978 flow [2024-06-21 16:38:07,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:38:07,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:38:07,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 16:38:07,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 16:38:07,697 INFO L175 Difference]: Start difference. First operand has 454 places, 1000 transitions, 15836 flow. Second operand 9 states and 162 transitions. [2024-06-21 16:38:07,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 1046 transitions, 18978 flow [2024-06-21 16:38:14,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 1046 transitions, 18781 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-21 16:38:14,794 INFO L231 Difference]: Finished difference. Result has 459 places, 1003 transitions, 16112 flow [2024-06-21 16:38:14,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15639, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1000, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=802, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16112, PETRI_PLACES=459, PETRI_TRANSITIONS=1003} [2024-06-21 16:38:14,796 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 417 predicate places. [2024-06-21 16:38:14,796 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 1003 transitions, 16112 flow [2024-06-21 16:38:14,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 16:38:14,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:14,797 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 16:38:14,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 16:38:14,798 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:38:14,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:14,798 INFO L85 PathProgramCache]: Analyzing trace with hash 98562063, now seen corresponding path program 2 times [2024-06-21 16:38:14,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:14,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934614211] [2024-06-21 16:38:14,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:14,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:14,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:15,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:38:15,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:15,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934614211] [2024-06-21 16:38:15,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934614211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:15,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:15,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:38:15,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483284382] [2024-06-21 16:38:15,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:15,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:38:15,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:15,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:38:15,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:38:15,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:38:15,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 1003 transitions, 16112 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:15,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:15,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:38:15,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:19,400 INFO L124 PetriNetUnfolderBase]: 6315/9359 cut-off events. [2024-06-21 16:38:19,400 INFO L125 PetriNetUnfolderBase]: For 2202637/2202688 co-relation queries the response was YES. [2024-06-21 16:38:19,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104683 conditions, 9359 events. 6315/9359 cut-off events. For 2202637/2202688 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 53371 event pairs, 1357 based on Foata normal form. 62/9418 useless extension candidates. Maximal degree in co-relation 104462. Up to 7316 conditions per place. [2024-06-21 16:38:19,579 INFO L140 encePairwiseOnDemand]: 25/41 looper letters, 880 selfloop transitions, 225 changer transitions 0/1108 dead transitions. [2024-06-21 16:38:19,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 1108 transitions, 20458 flow [2024-06-21 16:38:19,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:38:19,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:38:19,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-21 16:38:19,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48292682926829267 [2024-06-21 16:38:19,581 INFO L175 Difference]: Start difference. First operand has 459 places, 1003 transitions, 16112 flow. Second operand 10 states and 198 transitions. [2024-06-21 16:38:19,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 1108 transitions, 20458 flow [2024-06-21 16:38:28,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 1108 transitions, 20072 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 16:38:28,234 INFO L231 Difference]: Finished difference. Result has 469 places, 1041 transitions, 17152 flow [2024-06-21 16:38:28,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15731, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1003, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=797, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17152, PETRI_PLACES=469, PETRI_TRANSITIONS=1041} [2024-06-21 16:38:28,235 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 427 predicate places. [2024-06-21 16:38:28,235 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 1041 transitions, 17152 flow [2024-06-21 16:38:28,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:28,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:28,235 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 16:38:28,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 16:38:28,235 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:38:28,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:28,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1021293107, now seen corresponding path program 6 times [2024-06-21 16:38:28,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:28,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464258366] [2024-06-21 16:38:28,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:28,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:28,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:28,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:38:28,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:28,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464258366] [2024-06-21 16:38:28,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464258366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:28,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:28,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:38:28,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277825215] [2024-06-21 16:38:28,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:28,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:38:28,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:28,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:38:28,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:38:28,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:38:28,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 1041 transitions, 17152 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 16:38:28,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:28,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:38:28,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:32,278 INFO L124 PetriNetUnfolderBase]: 6341/9396 cut-off events. [2024-06-21 16:38:32,279 INFO L125 PetriNetUnfolderBase]: For 2191427/2191478 co-relation queries the response was YES. [2024-06-21 16:38:32,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108811 conditions, 9396 events. 6341/9396 cut-off events. For 2191427/2191478 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 53480 event pairs, 1297 based on Foata normal form. 52/9445 useless extension candidates. Maximal degree in co-relation 108583. Up to 8395 conditions per place. [2024-06-21 16:38:32,473 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 880 selfloop transitions, 207 changer transitions 0/1090 dead transitions. [2024-06-21 16:38:32,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 1090 transitions, 20499 flow [2024-06-21 16:38:32,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:38:32,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:38:32,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 16:38:32,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-21 16:38:32,475 INFO L175 Difference]: Start difference. First operand has 469 places, 1041 transitions, 17152 flow. Second operand 9 states and 161 transitions. [2024-06-21 16:38:32,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 1090 transitions, 20499 flow [2024-06-21 16:38:41,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 1090 transitions, 20309 flow, removed 94 selfloop flow, removed 1 redundant places. [2024-06-21 16:38:41,507 INFO L231 Difference]: Finished difference. Result has 477 places, 1047 transitions, 17539 flow [2024-06-21 16:38:41,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16962, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1041, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=840, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17539, PETRI_PLACES=477, PETRI_TRANSITIONS=1047} [2024-06-21 16:38:41,508 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 435 predicate places. [2024-06-21 16:38:41,508 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 1047 transitions, 17539 flow [2024-06-21 16:38:41,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 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 16:38:41,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:41,509 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 16:38:41,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 16:38:41,509 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:38:41,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:41,509 INFO L85 PathProgramCache]: Analyzing trace with hash -372428067, now seen corresponding path program 3 times [2024-06-21 16:38:41,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:41,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066043134] [2024-06-21 16:38:41,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:41,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:41,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:42,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:38:42,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:42,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066043134] [2024-06-21 16:38:42,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066043134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:42,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:42,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:38:42,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885132628] [2024-06-21 16:38:42,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:42,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:38:42,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:42,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:38:42,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:38:42,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:38:42,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 1047 transitions, 17539 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:42,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:42,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:38:42,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:45,815 INFO L124 PetriNetUnfolderBase]: 6305/9347 cut-off events. [2024-06-21 16:38:45,815 INFO L125 PetriNetUnfolderBase]: For 2205700/2205751 co-relation queries the response was YES. [2024-06-21 16:38:46,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106909 conditions, 9347 events. 6305/9347 cut-off events. For 2205700/2205751 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 53268 event pairs, 1359 based on Foata normal form. 62/9406 useless extension candidates. Maximal degree in co-relation 106678. Up to 7315 conditions per place. [2024-06-21 16:38:46,141 INFO L140 encePairwiseOnDemand]: 25/41 looper letters, 878 selfloop transitions, 230 changer transitions 0/1111 dead transitions. [2024-06-21 16:38:46,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 1111 transitions, 21053 flow [2024-06-21 16:38:46,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:38:46,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:38:46,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-21 16:38:46,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47317073170731705 [2024-06-21 16:38:46,142 INFO L175 Difference]: Start difference. First operand has 477 places, 1047 transitions, 17539 flow. Second operand 10 states and 194 transitions. [2024-06-21 16:38:46,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 1111 transitions, 21053 flow [2024-06-21 16:38:54,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 1111 transitions, 20657 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-21 16:38:54,801 INFO L231 Difference]: Finished difference. Result has 482 places, 1047 transitions, 17611 flow [2024-06-21 16:38:54,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17143, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1047, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=817, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17611, PETRI_PLACES=482, PETRI_TRANSITIONS=1047} [2024-06-21 16:38:54,807 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 440 predicate places. [2024-06-21 16:38:54,807 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 1047 transitions, 17611 flow [2024-06-21 16:38:54,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:54,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:54,807 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 16:38:54,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 16:38:54,808 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:38:54,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:54,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1706148033, now seen corresponding path program 4 times [2024-06-21 16:38:54,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:54,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130558403] [2024-06-21 16:38:54,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:54,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:54,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:55,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:38:55,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:55,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130558403] [2024-06-21 16:38:55,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130558403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:55,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:55,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:38:55,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769238079] [2024-06-21 16:38:55,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:55,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:38:55,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:55,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:38:55,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:38:55,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:38:55,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 1047 transitions, 17611 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:55,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:55,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:38:55,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:59,204 INFO L124 PetriNetUnfolderBase]: 6461/9564 cut-off events. [2024-06-21 16:38:59,205 INFO L125 PetriNetUnfolderBase]: For 2340376/2340427 co-relation queries the response was YES. [2024-06-21 16:38:59,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110982 conditions, 9564 events. 6461/9564 cut-off events. For 2340376/2340427 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 54522 event pairs, 1265 based on Foata normal form. 62/9623 useless extension candidates. Maximal degree in co-relation 110750. Up to 7395 conditions per place. [2024-06-21 16:38:59,373 INFO L140 encePairwiseOnDemand]: 25/41 looper letters, 876 selfloop transitions, 238 changer transitions 0/1117 dead transitions. [2024-06-21 16:38:59,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 1117 transitions, 21581 flow [2024-06-21 16:38:59,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:38:59,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:38:59,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-21 16:38:59,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658536585365854 [2024-06-21 16:38:59,375 INFO L175 Difference]: Start difference. First operand has 482 places, 1047 transitions, 17611 flow. Second operand 10 states and 191 transitions. [2024-06-21 16:38:59,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 1117 transitions, 21581 flow [2024-06-21 16:39:09,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 1117 transitions, 21139 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 16:39:09,867 INFO L231 Difference]: Finished difference. Result has 486 places, 1055 transitions, 17855 flow [2024-06-21 16:39:09,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17185, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1047, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=817, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17855, PETRI_PLACES=486, PETRI_TRANSITIONS=1055} [2024-06-21 16:39:09,868 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 444 predicate places. [2024-06-21 16:39:09,868 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 1055 transitions, 17855 flow [2024-06-21 16:39:09,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:09,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:09,868 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 16:39:09,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 16:39:09,868 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:39:09,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:09,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1641337199, now seen corresponding path program 5 times [2024-06-21 16:39:09,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:09,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644901692] [2024-06-21 16:39:09,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:09,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:09,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:10,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:39:10,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:10,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644901692] [2024-06-21 16:39:10,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644901692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:10,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:10,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:39:10,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412124158] [2024-06-21 16:39:10,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:10,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:39:10,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:10,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:39:10,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:39:10,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:39:10,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 1055 transitions, 17855 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:10,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:10,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:39:10,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:14,315 INFO L124 PetriNetUnfolderBase]: 6425/9516 cut-off events. [2024-06-21 16:39:14,316 INFO L125 PetriNetUnfolderBase]: For 2277668/2277719 co-relation queries the response was YES. [2024-06-21 16:39:14,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109318 conditions, 9516 events. 6425/9516 cut-off events. For 2277668/2277719 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 54219 event pairs, 1249 based on Foata normal form. 62/9575 useless extension candidates. Maximal degree in co-relation 109085. Up to 7379 conditions per place. [2024-06-21 16:39:14,497 INFO L140 encePairwiseOnDemand]: 25/41 looper letters, 870 selfloop transitions, 240 changer transitions 0/1113 dead transitions. [2024-06-21 16:39:14,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 1113 transitions, 21325 flow [2024-06-21 16:39:14,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:39:14,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:39:14,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-21 16:39:14,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585365853658537 [2024-06-21 16:39:14,498 INFO L175 Difference]: Start difference. First operand has 486 places, 1055 transitions, 17855 flow. Second operand 10 states and 188 transitions. [2024-06-21 16:39:14,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 1113 transitions, 21325 flow [2024-06-21 16:39:23,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 1113 transitions, 20808 flow, removed 76 selfloop flow, removed 6 redundant places. [2024-06-21 16:39:23,915 INFO L231 Difference]: Finished difference. Result has 490 places, 1055 transitions, 17825 flow [2024-06-21 16:39:23,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17338, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1055, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=815, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17825, PETRI_PLACES=490, PETRI_TRANSITIONS=1055} [2024-06-21 16:39:23,915 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 448 predicate places. [2024-06-21 16:39:23,915 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 1055 transitions, 17825 flow [2024-06-21 16:39:23,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:23,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:23,916 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 16:39:23,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 16:39:23,916 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:39:23,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:23,916 INFO L85 PathProgramCache]: Analyzing trace with hash 21331261, now seen corresponding path program 6 times [2024-06-21 16:39:23,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:23,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113698553] [2024-06-21 16:39:23,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:23,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:23,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:24,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:39:24,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:24,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113698553] [2024-06-21 16:39:24,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113698553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:24,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:24,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:39:24,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172754827] [2024-06-21 16:39:24,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:24,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:39:24,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:24,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:39:24,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:39:24,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:39:24,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 1055 transitions, 17825 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:24,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:24,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:39:24,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:28,313 INFO L124 PetriNetUnfolderBase]: 6389/9468 cut-off events. [2024-06-21 16:39:28,314 INFO L125 PetriNetUnfolderBase]: For 2206676/2206727 co-relation queries the response was YES. [2024-06-21 16:39:28,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106912 conditions, 9468 events. 6389/9468 cut-off events. For 2206676/2206727 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 53971 event pairs, 1231 based on Foata normal form. 62/9527 useless extension candidates. Maximal degree in co-relation 106678. Up to 7363 conditions per place. [2024-06-21 16:39:28,638 INFO L140 encePairwiseOnDemand]: 25/41 looper letters, 852 selfloop transitions, 256 changer transitions 0/1111 dead transitions. [2024-06-21 16:39:28,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 1111 transitions, 21273 flow [2024-06-21 16:39:28,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:39:28,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:39:28,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-21 16:39:28,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-21 16:39:28,639 INFO L175 Difference]: Start difference. First operand has 490 places, 1055 transitions, 17825 flow. Second operand 10 states and 185 transitions. [2024-06-21 16:39:28,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 1111 transitions, 21273 flow [2024-06-21 16:39:38,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 1111 transitions, 20780 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-21 16:39:38,425 INFO L231 Difference]: Finished difference. Result has 494 places, 1055 transitions, 17852 flow [2024-06-21 16:39:38,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17332, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1055, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=799, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17852, PETRI_PLACES=494, PETRI_TRANSITIONS=1055} [2024-06-21 16:39:38,426 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 452 predicate places. [2024-06-21 16:39:38,426 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 1055 transitions, 17852 flow [2024-06-21 16:39:38,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:38,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:38,426 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 16:39:38,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 16:39:38,426 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:39:38,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:38,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1034569393, now seen corresponding path program 6 times [2024-06-21 16:39:38,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:38,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139721704] [2024-06-21 16:39:38,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:38,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:38,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:39,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:39:39,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:39,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139721704] [2024-06-21 16:39:39,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139721704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:39,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:39,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:39:39,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862372886] [2024-06-21 16:39:39,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:39,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:39:39,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:39,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:39:39,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:39:39,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:39:39,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 1055 transitions, 17852 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:39,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:39,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:39:39,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:43,487 INFO L124 PetriNetUnfolderBase]: 6493/9628 cut-off events. [2024-06-21 16:39:43,488 INFO L125 PetriNetUnfolderBase]: For 2376513/2376546 co-relation queries the response was YES. [2024-06-21 16:39:43,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108508 conditions, 9628 events. 6493/9628 cut-off events. For 2376513/2376546 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 55281 event pairs, 1359 based on Foata normal form. 60/9686 useless extension candidates. Maximal degree in co-relation 108273. Up to 8537 conditions per place. [2024-06-21 16:39:43,660 INFO L140 encePairwiseOnDemand]: 25/41 looper letters, 852 selfloop transitions, 260 changer transitions 0/1115 dead transitions. [2024-06-21 16:39:43,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 1115 transitions, 20842 flow [2024-06-21 16:39:43,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:39:43,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:39:43,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 236 transitions. [2024-06-21 16:39:43,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4427767354596623 [2024-06-21 16:39:43,665 INFO L175 Difference]: Start difference. First operand has 494 places, 1055 transitions, 17852 flow. Second operand 13 states and 236 transitions. [2024-06-21 16:39:43,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 1115 transitions, 20842 flow [2024-06-21 16:39:54,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 1115 transitions, 20423 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 16:39:54,027 INFO L231 Difference]: Finished difference. Result has 503 places, 1062 transitions, 18196 flow [2024-06-21 16:39:54,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17433, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1055, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=795, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=18196, PETRI_PLACES=503, PETRI_TRANSITIONS=1062} [2024-06-21 16:39:54,028 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 461 predicate places. [2024-06-21 16:39:54,028 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 1062 transitions, 18196 flow [2024-06-21 16:39:54,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:54,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:54,028 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 16:39:54,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 16:39:54,028 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:39:54,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:54,029 INFO L85 PathProgramCache]: Analyzing trace with hash 2087962038, now seen corresponding path program 2 times [2024-06-21 16:39:54,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:54,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800352948] [2024-06-21 16:39:54,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:54,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:54,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:55,018 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 16:39:55,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:55,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800352948] [2024-06-21 16:39:55,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800352948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:55,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:55,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:39:55,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813054342] [2024-06-21 16:39:55,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:55,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:39:55,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:55,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:39:55,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:39:55,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:39:55,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 1062 transitions, 18196 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:55,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:55,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:39:55,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand