./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 --validate ./goblint.2024-05-07_14-17-48.files/protection/mix019_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b44c8288 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.2024-05-07_14-17-48.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 --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.witness-ghost-b44c828-m [2024-05-12 13:12:22,993 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 13:12:23,058 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 13:12:23,062 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 13:12:23,063 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 13:12:23,085 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 13:12:23,085 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 13:12:23,086 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 13:12:23,086 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 13:12:23,089 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 13:12:23,090 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 13:12:23,090 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 13:12:23,091 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 13:12:23,092 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 13:12:23,092 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 13:12:23,092 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 13:12:23,092 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 13:12:23,093 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 13:12:23,093 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 13:12:23,093 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 13:12:23,093 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 13:12:23,094 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 13:12:23,094 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 13:12:23,094 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 13:12:23,094 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 13:12:23,094 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 13:12:23,095 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 13:12:23,095 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 13:12:23,095 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 13:12:23,096 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 13:12:23,096 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 13:12:23,097 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 13:12:23,097 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 13:12:23,097 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 13:12:23,097 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 13:12:23,097 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 13:12:23,098 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 13:12:23,098 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 13:12:23,098 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 13:12:23,098 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 13:12:23,098 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 13:12:23,099 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 13:12:23,099 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 13:12:23,099 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 13:12:23,345 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 13:12:23,363 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 13:12:23,365 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 13:12:23,366 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 13:12:23,366 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 13:12:23,367 INFO L431 ainManager$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 [2024-05-12 13:12:24,398 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 13:12:24,595 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 13:12:24,596 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix019_power.oepc_pso.oepc_rmo.oepc.i [2024-05-12 13:12:24,611 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aff385bcf/24780f05eb83464c96d4a0096f049ac8/FLAGbd5fe599e [2024-05-12 13:12:24,622 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aff385bcf/24780f05eb83464c96d4a0096f049ac8 [2024-05-12 13:12:24,624 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 13:12:24,625 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 13:12:24,625 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/protection/mix019_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-05-12 13:12:24,760 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 13:12:24,762 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 13:12:24,763 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 13:12:24,763 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 13:12:24,766 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 13:12:24,767 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 01:12:24" (1/2) ... [2024-05-12 13:12:24,768 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9fa3171 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:12:24, skipping insertion in model container [2024-05-12 13:12:24,768 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 01:12:24" (1/2) ... [2024-05-12 13:12:24,770 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1d8d0bf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 01:12:24, skipping insertion in model container [2024-05-12 13:12:24,770 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 01:12:24" (2/2) ... [2024-05-12 13:12:24,770 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9fa3171 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:12:24, skipping insertion in model container [2024-05-12 13:12:24,770 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 01:12:24" (2/2) ... [2024-05-12 13:12:24,770 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 13:12:24,880 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 13:12:24,881 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 || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$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$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1))) [2024-05-12 13:12:24,882 INFO L97 edCorrectnessWitness]: Location invariant before [L844-L844] ((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (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 || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1))) [2024-05-12 13:12:24,882 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 || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$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$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1))) [2024-05-12 13:12:24,882 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 13:12:24,882 INFO L106 edCorrectnessWitness]: ghost_update [L839-L839] multithreaded = 1; [2024-05-12 13:12:24,931 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 13:12:25,108 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix019_power.oepc_pso.oepc_rmo.oepc.i[969,982] [2024-05-12 13:12:25,279 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 13:12:25,293 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-05-12 13:12:25,326 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix019_power.oepc_pso.oepc_rmo.oepc.i[969,982] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 13:12:25,411 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 13:12:25,464 INFO L206 MainTranslator]: Completed translation [2024-05-12 13:12:25,465 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:12:25 WrapperNode [2024-05-12 13:12:25,465 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 13:12:25,466 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 13:12:25,466 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 13:12:25,466 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 13:12:25,471 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:12:25" (1/1) ... [2024-05-12 13:12:25,483 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:12:25" (1/1) ... [2024-05-12 13:12:25,511 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 134 [2024-05-12 13:12:25,511 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 13:12:25,512 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 13:12:25,512 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 13:12:25,512 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 13:12:25,520 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:12:25" (1/1) ... [2024-05-12 13:12:25,521 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:12:25" (1/1) ... [2024-05-12 13:12:25,523 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:12:25" (1/1) ... [2024-05-12 13:12:25,539 INFO L175 MemorySlicer]: Split 5 memory accesses to 4 slices as follows [2, 1, 1, 1]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-05-12 13:12:25,539 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:12:25" (1/1) ... [2024-05-12 13:12:25,540 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:12:25" (1/1) ... [2024-05-12 13:12:25,547 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:12:25" (1/1) ... [2024-05-12 13:12:25,549 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:12:25" (1/1) ... [2024-05-12 13:12:25,551 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:12:25" (1/1) ... [2024-05-12 13:12:25,552 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:12:25" (1/1) ... [2024-05-12 13:12:25,562 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 13:12:25,563 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 13:12:25,563 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 13:12:25,563 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 13:12:25,564 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:12:25" (1/1) ... [2024-05-12 13:12:25,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 13:12:25,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 13:12:25,609 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) [2024-05-12 13:12:25,636 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 [2024-05-12 13:12:25,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 13:12:25,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 13:12:25,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 13:12:25,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-05-12 13:12:25,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 13:12:25,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 13:12:25,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 13:12:25,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 13:12:25,652 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-05-12 13:12:25,652 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-05-12 13:12:25,652 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-05-12 13:12:25,653 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-05-12 13:12:25,653 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-05-12 13:12:25,653 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-05-12 13:12:25,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 13:12:25,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 13:12:25,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 13:12:25,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-05-12 13:12:25,656 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 13:12:25,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 13:12:25,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 13:12:25,658 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-05-12 13:12:25,808 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 13:12:25,810 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 13:12:26,158 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 13:12:26,158 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 13:12:26,311 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 13:12:26,311 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-05-12 13:12:26,312 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 01:12:26 BoogieIcfgContainer [2024-05-12 13:12:26,312 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 13:12:26,315 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 13:12:26,315 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 13:12:26,317 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 13:12:26,317 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 01:12:24" (1/4) ... [2024-05-12 13:12:26,318 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2be54f1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 01:12:26, skipping insertion in model container [2024-05-12 13:12:26,319 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 01:12:24" (2/4) ... [2024-05-12 13:12:26,319 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2be54f1d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 01:12:26, skipping insertion in model container [2024-05-12 13:12:26,319 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 01:12:25" (3/4) ... [2024-05-12 13:12:26,320 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2be54f1d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 01:12:26, skipping insertion in model container [2024-05-12 13:12:26,320 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 01:12:26" (4/4) ... [2024-05-12 13:12:26,321 INFO L112 eAbstractionObserver]: Analyzing ICFG mix019_power.oepc_pso.oepc_rmo.oepc.i [2024-05-12 13:12:26,335 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 13:12:26,335 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-05-12 13:12:26,335 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 13:12:26,380 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-05-12 13:12:26,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 48 transitions, 108 flow [2024-05-12 13:12:26,438 INFO L124 PetriNetUnfolderBase]: 1/45 cut-off events. [2024-05-12 13:12:26,438 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 13:12:26,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 45 events. 1/45 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 73 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2024-05-12 13:12:26,443 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 48 transitions, 108 flow [2024-05-12 13:12:26,447 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 45 transitions, 99 flow [2024-05-12 13:12:26,460 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 13:12:26,466 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;@59ded551, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 13:12:26,467 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-05-12 13:12:26,471 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 13:12:26,471 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-05-12 13:12:26,471 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 13:12:26,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:26,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-05-12 13:12:26,472 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:26,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:26,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1626599668, now seen corresponding path program 1 times [2024-05-12 13:12:26,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:26,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786999232] [2024-05-12 13:12:26,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:26,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:26,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:27,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:27,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:27,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786999232] [2024-05-12 13:12:27,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786999232] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:27,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:27,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 13:12:27,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644149412] [2024-05-12 13:12:27,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:27,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 13:12:27,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:27,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 13:12:27,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 13:12:27,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-05-12 13:12:27,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:27,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:27,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-05-12 13:12:27,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:28,092 INFO L124 PetriNetUnfolderBase]: 3699/6158 cut-off events. [2024-05-12 13:12:28,092 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-05-12 13:12:28,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11586 conditions, 6158 events. 3699/6158 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 40355 event pairs, 2881 based on Foata normal form. 176/5829 useless extension candidates. Maximal degree in co-relation 11571. Up to 5323 conditions per place. [2024-05-12 13:12:28,122 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 43 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2024-05-12 13:12:28,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 59 transitions, 229 flow [2024-05-12 13:12:28,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 13:12:28,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 13:12:28,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-05-12 13:12:28,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6597222222222222 [2024-05-12 13:12:28,132 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 99 flow. Second operand 3 states and 95 transitions. [2024-05-12 13:12:28,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 59 transitions, 229 flow [2024-05-12 13:12:28,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 59 transitions, 224 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-05-12 13:12:28,136 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 131 flow [2024-05-12 13:12:28,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2024-05-12 13:12:28,140 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 0 predicate places. [2024-05-12 13:12:28,140 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 131 flow [2024-05-12 13:12:28,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:28,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:28,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-05-12 13:12:28,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 13:12:28,141 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P0Err0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:28,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:28,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1626598671, now seen corresponding path program 1 times [2024-05-12 13:12:28,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:28,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667968122] [2024-05-12 13:12:28,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:28,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:28,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:28,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:28,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:28,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667968122] [2024-05-12 13:12:28,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667968122] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:28,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:28,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 13:12:28,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535831315] [2024-05-12 13:12:28,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:28,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 13:12:28,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:28,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 13:12:28,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 13:12:28,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-05-12 13:12:28,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 131 flow. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:28,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:28,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-05-12 13:12:28,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:28,414 INFO L124 PetriNetUnfolderBase]: 932/1803 cut-off events. [2024-05-12 13:12:28,415 INFO L125 PetriNetUnfolderBase]: For 157/157 co-relation queries the response was YES. [2024-05-12 13:12:28,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3489 conditions, 1803 events. 932/1803 cut-off events. For 157/157 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12097 event pairs, 418 based on Foata normal form. 0/1706 useless extension candidates. Maximal degree in co-relation 3474. Up to 1189 conditions per place. [2024-05-12 13:12:28,423 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 37 selfloop transitions, 3 changer transitions 0/62 dead transitions. [2024-05-12 13:12:28,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 62 transitions, 238 flow [2024-05-12 13:12:28,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 13:12:28,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 13:12:28,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 109 transitions. [2024-05-12 13:12:28,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7569444444444444 [2024-05-12 13:12:28,425 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 131 flow. Second operand 3 states and 109 transitions. [2024-05-12 13:12:28,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 62 transitions, 238 flow [2024-05-12 13:12:28,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 62 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 13:12:28,427 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 124 flow [2024-05-12 13:12:28,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-05-12 13:12:28,428 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 0 predicate places. [2024-05-12 13:12:28,428 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 124 flow [2024-05-12 13:12:28,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:28,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:28,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:12:28,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 13:12:28,429 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:28,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:28,429 INFO L85 PathProgramCache]: Analyzing trace with hash 205830090, now seen corresponding path program 1 times [2024-05-12 13:12:28,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:28,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78156929] [2024-05-12 13:12:28,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:28,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:28,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:28,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:28,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:28,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78156929] [2024-05-12 13:12:28,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78156929] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:28,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:28,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 13:12:28,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842267863] [2024-05-12 13:12:28,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:28,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 13:12:28,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:28,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 13:12:28,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-05-12 13:12:29,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-05-12 13:12:29,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 124 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:29,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:29,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-05-12 13:12:29,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:29,476 INFO L124 PetriNetUnfolderBase]: 3141/5234 cut-off events. [2024-05-12 13:12:29,476 INFO L125 PetriNetUnfolderBase]: For 1176/1176 co-relation queries the response was YES. [2024-05-12 13:12:29,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11017 conditions, 5234 events. 3141/5234 cut-off events. For 1176/1176 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 32951 event pairs, 2003 based on Foata normal form. 3/5032 useless extension candidates. Maximal degree in co-relation 11001. Up to 4514 conditions per place. [2024-05-12 13:12:29,501 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 51 selfloop transitions, 8 changer transitions 2/72 dead transitions. [2024-05-12 13:12:29,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 72 transitions, 318 flow [2024-05-12 13:12:29,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 13:12:29,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 13:12:29,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2024-05-12 13:12:29,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.609375 [2024-05-12 13:12:29,507 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 124 flow. Second operand 4 states and 117 transitions. [2024-05-12 13:12:29,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 72 transitions, 318 flow [2024-05-12 13:12:29,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 72 transitions, 310 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 13:12:29,510 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 185 flow [2024-05-12 13:12:29,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=185, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-05-12 13:12:29,511 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 3 predicate places. [2024-05-12 13:12:29,511 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 185 flow [2024-05-12 13:12:29,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:29,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:29,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:12:29,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 13:12:29,512 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:29,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:29,513 INFO L85 PathProgramCache]: Analyzing trace with hash 2085766063, now seen corresponding path program 1 times [2024-05-12 13:12:29,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:29,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653695371] [2024-05-12 13:12:29,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:29,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:29,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:30,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:30,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:30,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653695371] [2024-05-12 13:12:30,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653695371] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:30,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:30,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 13:12:30,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018711238] [2024-05-12 13:12:30,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:30,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 13:12:30,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:30,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 13:12:30,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-05-12 13:12:30,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-05-12 13:12:30,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 185 flow. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 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) [2024-05-12 13:12:30,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:30,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-05-12 13:12:30,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:30,758 INFO L124 PetriNetUnfolderBase]: 2799/4789 cut-off events. [2024-05-12 13:12:30,758 INFO L125 PetriNetUnfolderBase]: For 2072/2072 co-relation queries the response was YES. [2024-05-12 13:12:30,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10914 conditions, 4789 events. 2799/4789 cut-off events. For 2072/2072 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 30493 event pairs, 1261 based on Foata normal form. 7/4608 useless extension candidates. Maximal degree in co-relation 10896. Up to 3877 conditions per place. [2024-05-12 13:12:30,786 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 69 selfloop transitions, 18 changer transitions 0/98 dead transitions. [2024-05-12 13:12:30,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 98 transitions, 505 flow [2024-05-12 13:12:30,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 13:12:30,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 13:12:30,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 152 transitions. [2024-05-12 13:12:30,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-05-12 13:12:30,788 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 185 flow. Second operand 5 states and 152 transitions. [2024-05-12 13:12:30,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 98 transitions, 505 flow [2024-05-12 13:12:30,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 98 transitions, 494 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-05-12 13:12:30,791 INFO L231 Difference]: Finished difference. Result has 62 places, 64 transitions, 301 flow [2024-05-12 13:12:30,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=301, PETRI_PLACES=62, PETRI_TRANSITIONS=64} [2024-05-12 13:12:30,792 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 8 predicate places. [2024-05-12 13:12:30,792 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 64 transitions, 301 flow [2024-05-12 13:12:30,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 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) [2024-05-12 13:12:30,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:30,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:12:30,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-05-12 13:12:30,793 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:30,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:30,793 INFO L85 PathProgramCache]: Analyzing trace with hash 234239113, now seen corresponding path program 1 times [2024-05-12 13:12:30,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:30,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120790597] [2024-05-12 13:12:30,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:30,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:30,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:31,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:31,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:31,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120790597] [2024-05-12 13:12:31,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120790597] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:31,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:31,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 13:12:31,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328854229] [2024-05-12 13:12:31,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:31,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 13:12:31,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:31,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 13:12:31,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-05-12 13:12:31,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-05-12 13:12:31,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 64 transitions, 301 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 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) [2024-05-12 13:12:31,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:31,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-05-12 13:12:31,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:32,109 INFO L124 PetriNetUnfolderBase]: 2849/4472 cut-off events. [2024-05-12 13:12:32,110 INFO L125 PetriNetUnfolderBase]: For 5190/5190 co-relation queries the response was YES. [2024-05-12 13:12:32,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12888 conditions, 4472 events. 2849/4472 cut-off events. For 5190/5190 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 26230 event pairs, 829 based on Foata normal form. 7/4444 useless extension candidates. Maximal degree in co-relation 12866. Up to 3782 conditions per place. [2024-05-12 13:12:32,138 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 87 selfloop transitions, 32 changer transitions 0/130 dead transitions. [2024-05-12 13:12:32,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 130 transitions, 809 flow [2024-05-12 13:12:32,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:12:32,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:12:32,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-05-12 13:12:32,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6423611111111112 [2024-05-12 13:12:32,145 INFO L175 Difference]: Start difference. First operand has 62 places, 64 transitions, 301 flow. Second operand 6 states and 185 transitions. [2024-05-12 13:12:32,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 130 transitions, 809 flow [2024-05-12 13:12:32,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 130 transitions, 801 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-05-12 13:12:32,153 INFO L231 Difference]: Finished difference. Result has 71 places, 79 transitions, 508 flow [2024-05-12 13:12:32,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=508, PETRI_PLACES=71, PETRI_TRANSITIONS=79} [2024-05-12 13:12:32,155 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 17 predicate places. [2024-05-12 13:12:32,156 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 79 transitions, 508 flow [2024-05-12 13:12:32,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 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) [2024-05-12 13:12:32,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:32,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:12:32,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-05-12 13:12:32,156 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:32,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:32,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1328521458, now seen corresponding path program 1 times [2024-05-12 13:12:32,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:32,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504079924] [2024-05-12 13:12:32,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:32,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:32,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:32,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:32,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:32,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504079924] [2024-05-12 13:12:32,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504079924] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:32,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:32,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:12:32,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712660486] [2024-05-12 13:12:32,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:32,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:12:32,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:32,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:12:32,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:12:33,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2024-05-12 13:12:33,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 79 transitions, 508 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:33,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:33,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2024-05-12 13:12:33,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:33,777 INFO L124 PetriNetUnfolderBase]: 3077/5233 cut-off events. [2024-05-12 13:12:33,778 INFO L125 PetriNetUnfolderBase]: For 11460/11460 co-relation queries the response was YES. [2024-05-12 13:12:33,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16911 conditions, 5233 events. 3077/5233 cut-off events. For 11460/11460 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 33818 event pairs, 1010 based on Foata normal form. 30/5110 useless extension candidates. Maximal degree in co-relation 16883. Up to 3917 conditions per place. [2024-05-12 13:12:33,811 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 107 selfloop transitions, 24 changer transitions 0/142 dead transitions. [2024-05-12 13:12:33,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 142 transitions, 1016 flow [2024-05-12 13:12:33,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:12:33,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:12:33,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-05-12 13:12:33,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6220238095238095 [2024-05-12 13:12:33,813 INFO L175 Difference]: Start difference. First operand has 71 places, 79 transitions, 508 flow. Second operand 7 states and 209 transitions. [2024-05-12 13:12:33,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 142 transitions, 1016 flow [2024-05-12 13:12:33,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 142 transitions, 974 flow, removed 21 selfloop flow, removed 0 redundant places. [2024-05-12 13:12:33,824 INFO L231 Difference]: Finished difference. Result has 78 places, 84 transitions, 590 flow [2024-05-12 13:12:33,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=476, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=590, PETRI_PLACES=78, PETRI_TRANSITIONS=84} [2024-05-12 13:12:33,827 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 24 predicate places. [2024-05-12 13:12:33,827 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 84 transitions, 590 flow [2024-05-12 13:12:33,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:33,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:33,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:12:33,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-05-12 13:12:33,828 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:33,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:33,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1393045110, now seen corresponding path program 1 times [2024-05-12 13:12:33,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:33,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831493679] [2024-05-12 13:12:33,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:33,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:33,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:34,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:34,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:34,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831493679] [2024-05-12 13:12:34,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831493679] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:34,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:34,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 13:12:34,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155514835] [2024-05-12 13:12:34,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:34,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 13:12:34,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:34,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 13:12:34,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-05-12 13:12:34,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-05-12 13:12:34,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 84 transitions, 590 flow. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 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) [2024-05-12 13:12:34,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:34,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-05-12 13:12:34,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:35,186 INFO L124 PetriNetUnfolderBase]: 3560/6049 cut-off events. [2024-05-12 13:12:35,186 INFO L125 PetriNetUnfolderBase]: For 13947/13947 co-relation queries the response was YES. [2024-05-12 13:12:35,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19321 conditions, 6049 events. 3560/6049 cut-off events. For 13947/13947 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 39608 event pairs, 1333 based on Foata normal form. 4/5880 useless extension candidates. Maximal degree in co-relation 19289. Up to 5126 conditions per place. [2024-05-12 13:12:35,219 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 80 selfloop transitions, 13 changer transitions 0/103 dead transitions. [2024-05-12 13:12:35,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 103 transitions, 826 flow [2024-05-12 13:12:35,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 13:12:35,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 13:12:35,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-05-12 13:12:35,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2024-05-12 13:12:35,221 INFO L175 Difference]: Start difference. First operand has 78 places, 84 transitions, 590 flow. Second operand 5 states and 124 transitions. [2024-05-12 13:12:35,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 103 transitions, 826 flow [2024-05-12 13:12:35,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 103 transitions, 772 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-05-12 13:12:35,236 INFO L231 Difference]: Finished difference. Result has 79 places, 84 transitions, 573 flow [2024-05-12 13:12:35,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=573, PETRI_PLACES=79, PETRI_TRANSITIONS=84} [2024-05-12 13:12:35,237 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 25 predicate places. [2024-05-12 13:12:35,238 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 84 transitions, 573 flow [2024-05-12 13:12:35,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 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) [2024-05-12 13:12:35,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:35,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:12:35,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-05-12 13:12:35,238 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:35,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:35,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1734414668, now seen corresponding path program 1 times [2024-05-12 13:12:35,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:35,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983485737] [2024-05-12 13:12:35,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:35,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:35,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:35,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:35,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:35,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983485737] [2024-05-12 13:12:35,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983485737] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:35,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:35,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:12:35,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909541878] [2024-05-12 13:12:35,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:35,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:12:35,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:35,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:12:35,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:12:35,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-05-12 13:12:35,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 84 transitions, 573 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:35,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:35,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-05-12 13:12:35,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:36,602 INFO L124 PetriNetUnfolderBase]: 3596/6048 cut-off events. [2024-05-12 13:12:36,603 INFO L125 PetriNetUnfolderBase]: For 14243/14243 co-relation queries the response was YES. [2024-05-12 13:12:36,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19234 conditions, 6048 events. 3596/6048 cut-off events. For 14243/14243 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 38750 event pairs, 1055 based on Foata normal form. 8/5861 useless extension candidates. Maximal degree in co-relation 19200. Up to 4982 conditions per place. [2024-05-12 13:12:36,641 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 88 selfloop transitions, 21 changer transitions 0/119 dead transitions. [2024-05-12 13:12:36,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 119 transitions, 933 flow [2024-05-12 13:12:36,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:12:36,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:12:36,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-05-12 13:12:36,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5451388888888888 [2024-05-12 13:12:36,643 INFO L175 Difference]: Start difference. First operand has 79 places, 84 transitions, 573 flow. Second operand 6 states and 157 transitions. [2024-05-12 13:12:36,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 119 transitions, 933 flow [2024-05-12 13:12:36,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 119 transitions, 896 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-05-12 13:12:36,658 INFO L231 Difference]: Finished difference. Result has 81 places, 87 transitions, 622 flow [2024-05-12 13:12:36,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=622, PETRI_PLACES=81, PETRI_TRANSITIONS=87} [2024-05-12 13:12:36,659 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 27 predicate places. [2024-05-12 13:12:36,659 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 87 transitions, 622 flow [2024-05-12 13:12:36,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:36,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:36,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:12:36,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-05-12 13:12:36,660 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:36,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:36,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1741973708, now seen corresponding path program 2 times [2024-05-12 13:12:36,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:36,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884294922] [2024-05-12 13:12:36,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:36,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:36,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:37,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:37,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:37,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884294922] [2024-05-12 13:12:37,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884294922] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:37,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:37,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:12:37,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984370068] [2024-05-12 13:12:37,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:37,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:12:37,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:37,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:12:37,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:12:37,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-05-12 13:12:37,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 87 transitions, 622 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:37,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:37,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-05-12 13:12:37,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:37,985 INFO L124 PetriNetUnfolderBase]: 3554/6016 cut-off events. [2024-05-12 13:12:37,985 INFO L125 PetriNetUnfolderBase]: For 15533/15533 co-relation queries the response was YES. [2024-05-12 13:12:38,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19359 conditions, 6016 events. 3554/6016 cut-off events. For 15533/15533 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 39147 event pairs, 1325 based on Foata normal form. 4/5848 useless extension candidates. Maximal degree in co-relation 19325. Up to 5089 conditions per place. [2024-05-12 13:12:38,021 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 88 selfloop transitions, 13 changer transitions 0/111 dead transitions. [2024-05-12 13:12:38,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 111 transitions, 886 flow [2024-05-12 13:12:38,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:12:38,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:12:38,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-05-12 13:12:38,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5069444444444444 [2024-05-12 13:12:38,022 INFO L175 Difference]: Start difference. First operand has 81 places, 87 transitions, 622 flow. Second operand 6 states and 146 transitions. [2024-05-12 13:12:38,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 111 transitions, 886 flow [2024-05-12 13:12:38,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 111 transitions, 853 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-05-12 13:12:38,045 INFO L231 Difference]: Finished difference. Result has 84 places, 87 transitions, 623 flow [2024-05-12 13:12:38,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=589, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=623, PETRI_PLACES=84, PETRI_TRANSITIONS=87} [2024-05-12 13:12:38,046 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 30 predicate places. [2024-05-12 13:12:38,047 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 87 transitions, 623 flow [2024-05-12 13:12:38,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:38,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:38,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:12:38,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-05-12 13:12:38,047 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:38,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:38,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1813628466, now seen corresponding path program 1 times [2024-05-12 13:12:38,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:38,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778611389] [2024-05-12 13:12:38,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:38,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:38,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:39,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:39,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:39,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778611389] [2024-05-12 13:12:39,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778611389] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:39,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:39,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:12:39,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102300772] [2024-05-12 13:12:39,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:39,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:12:39,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:39,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:12:39,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:12:39,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-05-12 13:12:39,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 87 transitions, 623 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:39,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:39,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-05-12 13:12:39,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:40,301 INFO L124 PetriNetUnfolderBase]: 4337/7248 cut-off events. [2024-05-12 13:12:40,301 INFO L125 PetriNetUnfolderBase]: For 19606/19606 co-relation queries the response was YES. [2024-05-12 13:12:40,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23017 conditions, 7248 events. 4337/7248 cut-off events. For 19606/19606 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 47197 event pairs, 1634 based on Foata normal form. 4/7041 useless extension candidates. Maximal degree in co-relation 22982. Up to 6149 conditions per place. [2024-05-12 13:12:40,342 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 101 selfloop transitions, 20 changer transitions 0/130 dead transitions. [2024-05-12 13:12:40,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 130 transitions, 1027 flow [2024-05-12 13:12:40,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:12:40,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:12:40,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-05-12 13:12:40,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49404761904761907 [2024-05-12 13:12:40,344 INFO L175 Difference]: Start difference. First operand has 84 places, 87 transitions, 623 flow. Second operand 7 states and 166 transitions. [2024-05-12 13:12:40,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 130 transitions, 1027 flow [2024-05-12 13:12:40,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 130 transitions, 962 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-05-12 13:12:40,364 INFO L231 Difference]: Finished difference. Result has 86 places, 94 transitions, 685 flow [2024-05-12 13:12:40,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=567, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=685, PETRI_PLACES=86, PETRI_TRANSITIONS=94} [2024-05-12 13:12:40,365 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 32 predicate places. [2024-05-12 13:12:40,365 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 94 transitions, 685 flow [2024-05-12 13:12:40,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:40,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:40,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:12:40,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-05-12 13:12:40,366 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:40,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:40,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1150753012, now seen corresponding path program 1 times [2024-05-12 13:12:40,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:40,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690516660] [2024-05-12 13:12:40,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:40,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:40,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:40,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:40,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:40,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690516660] [2024-05-12 13:12:40,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690516660] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:40,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:40,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 13:12:40,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146770040] [2024-05-12 13:12:40,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:40,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 13:12:40,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:40,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 13:12:40,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-05-12 13:12:40,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-05-12 13:12:40,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 94 transitions, 685 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) [2024-05-12 13:12:40,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:40,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-05-12 13:12:40,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:41,829 INFO L124 PetriNetUnfolderBase]: 4970/8104 cut-off events. [2024-05-12 13:12:41,830 INFO L125 PetriNetUnfolderBase]: For 25119/25119 co-relation queries the response was YES. [2024-05-12 13:12:41,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26662 conditions, 8104 events. 4970/8104 cut-off events. For 25119/25119 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 51803 event pairs, 1967 based on Foata normal form. 1/7862 useless extension candidates. Maximal degree in co-relation 26626. Up to 7107 conditions per place. [2024-05-12 13:12:41,883 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 93 selfloop transitions, 11 changer transitions 0/112 dead transitions. [2024-05-12 13:12:41,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 112 transitions, 957 flow [2024-05-12 13:12:41,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 13:12:41,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 13:12:41,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 111 transitions. [2024-05-12 13:12:41,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625 [2024-05-12 13:12:41,885 INFO L175 Difference]: Start difference. First operand has 86 places, 94 transitions, 685 flow. Second operand 5 states and 111 transitions. [2024-05-12 13:12:41,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 112 transitions, 957 flow [2024-05-12 13:12:41,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 112 transitions, 910 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-05-12 13:12:41,910 INFO L231 Difference]: Finished difference. Result has 87 places, 97 transitions, 699 flow [2024-05-12 13:12:41,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=699, PETRI_PLACES=87, PETRI_TRANSITIONS=97} [2024-05-12 13:12:41,911 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 33 predicate places. [2024-05-12 13:12:41,911 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 97 transitions, 699 flow [2024-05-12 13:12:41,911 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) [2024-05-12 13:12:41,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:41,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:12:41,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-05-12 13:12:41,911 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:41,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:41,912 INFO L85 PathProgramCache]: Analyzing trace with hash 43994119, now seen corresponding path program 1 times [2024-05-12 13:12:41,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:41,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92003740] [2024-05-12 13:12:41,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:41,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:41,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:42,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:42,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:42,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92003740] [2024-05-12 13:12:42,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92003740] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:42,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:42,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:12:42,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969647808] [2024-05-12 13:12:42,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:42,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:12:42,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:42,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:12:42,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:12:42,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-05-12 13:12:42,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 97 transitions, 699 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:42,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:42,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-05-12 13:12:42,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:43,828 INFO L124 PetriNetUnfolderBase]: 4271/6545 cut-off events. [2024-05-12 13:12:43,828 INFO L125 PetriNetUnfolderBase]: For 28109/28111 co-relation queries the response was YES. [2024-05-12 13:12:43,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23994 conditions, 6545 events. 4271/6545 cut-off events. For 28109/28111 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 39134 event pairs, 1028 based on Foata normal form. 4/6480 useless extension candidates. Maximal degree in co-relation 23957. Up to 5583 conditions per place. [2024-05-12 13:12:43,868 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 97 selfloop transitions, 44 changer transitions 0/153 dead transitions. [2024-05-12 13:12:43,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 153 transitions, 1249 flow [2024-05-12 13:12:43,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:12:43,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:12:43,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-05-12 13:12:43,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-05-12 13:12:43,870 INFO L175 Difference]: Start difference. First operand has 87 places, 97 transitions, 699 flow. Second operand 7 states and 189 transitions. [2024-05-12 13:12:43,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 153 transitions, 1249 flow [2024-05-12 13:12:43,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 153 transitions, 1214 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-05-12 13:12:43,902 INFO L231 Difference]: Finished difference. Result has 91 places, 103 transitions, 807 flow [2024-05-12 13:12:43,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=807, PETRI_PLACES=91, PETRI_TRANSITIONS=103} [2024-05-12 13:12:43,904 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 37 predicate places. [2024-05-12 13:12:43,904 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 103 transitions, 807 flow [2024-05-12 13:12:43,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:43,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:43,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:12:43,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-05-12 13:12:43,905 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:43,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:43,906 INFO L85 PathProgramCache]: Analyzing trace with hash 152199043, now seen corresponding path program 2 times [2024-05-12 13:12:43,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:43,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410678627] [2024-05-12 13:12:43,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:43,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:43,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:44,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:44,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:44,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410678627] [2024-05-12 13:12:44,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410678627] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:44,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:44,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:12:44,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835639594] [2024-05-12 13:12:44,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:44,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:12:44,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:44,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:12:44,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:12:44,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-05-12 13:12:44,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 103 transitions, 807 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:44,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:44,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-05-12 13:12:44,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:45,694 INFO L124 PetriNetUnfolderBase]: 4271/6535 cut-off events. [2024-05-12 13:12:45,694 INFO L125 PetriNetUnfolderBase]: For 32346/32348 co-relation queries the response was YES. [2024-05-12 13:12:45,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25270 conditions, 6535 events. 4271/6535 cut-off events. For 32346/32348 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 38916 event pairs, 1047 based on Foata normal form. 4/6480 useless extension candidates. Maximal degree in co-relation 25232. Up to 5713 conditions per place. [2024-05-12 13:12:45,736 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 98 selfloop transitions, 41 changer transitions 0/151 dead transitions. [2024-05-12 13:12:45,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 151 transitions, 1299 flow [2024-05-12 13:12:45,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:12:45,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:12:45,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-05-12 13:12:45,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-05-12 13:12:45,738 INFO L175 Difference]: Start difference. First operand has 91 places, 103 transitions, 807 flow. Second operand 7 states and 184 transitions. [2024-05-12 13:12:45,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 151 transitions, 1299 flow [2024-05-12 13:12:45,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 151 transitions, 1238 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-05-12 13:12:45,790 INFO L231 Difference]: Finished difference. Result has 97 places, 107 transitions, 924 flow [2024-05-12 13:12:45,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=748, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=924, PETRI_PLACES=97, PETRI_TRANSITIONS=107} [2024-05-12 13:12:45,791 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 43 predicate places. [2024-05-12 13:12:45,791 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 107 transitions, 924 flow [2024-05-12 13:12:45,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:45,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:45,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:12:45,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-05-12 13:12:45,792 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:45,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:45,792 INFO L85 PathProgramCache]: Analyzing trace with hash -185278807, now seen corresponding path program 1 times [2024-05-12 13:12:45,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:45,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206818924] [2024-05-12 13:12:45,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:45,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:45,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:46,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:46,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:46,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206818924] [2024-05-12 13:12:46,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206818924] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:46,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:46,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:12:46,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757272903] [2024-05-12 13:12:46,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:46,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:12:46,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:46,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:12:46,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:12:46,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-05-12 13:12:46,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 107 transitions, 924 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:46,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:46,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-05-12 13:12:46,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:47,687 INFO L124 PetriNetUnfolderBase]: 4686/7483 cut-off events. [2024-05-12 13:12:47,687 INFO L125 PetriNetUnfolderBase]: For 39739/39739 co-relation queries the response was YES. [2024-05-12 13:12:47,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29198 conditions, 7483 events. 4686/7483 cut-off events. For 39739/39739 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 46918 event pairs, 1731 based on Foata normal form. 2/7317 useless extension candidates. Maximal degree in co-relation 29156. Up to 6582 conditions per place. [2024-05-12 13:12:47,736 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 116 selfloop transitions, 23 changer transitions 0/149 dead transitions. [2024-05-12 13:12:47,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 149 transitions, 1405 flow [2024-05-12 13:12:47,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:12:47,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:12:47,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-05-12 13:12:47,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-05-12 13:12:47,738 INFO L175 Difference]: Start difference. First operand has 97 places, 107 transitions, 924 flow. Second operand 7 states and 164 transitions. [2024-05-12 13:12:47,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 149 transitions, 1405 flow [2024-05-12 13:12:47,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 149 transitions, 1325 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-05-12 13:12:47,794 INFO L231 Difference]: Finished difference. Result has 102 places, 119 transitions, 1064 flow [2024-05-12 13:12:47,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1064, PETRI_PLACES=102, PETRI_TRANSITIONS=119} [2024-05-12 13:12:47,795 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 48 predicate places. [2024-05-12 13:12:47,795 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 119 transitions, 1064 flow [2024-05-12 13:12:47,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:47,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:47,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:12:47,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-05-12 13:12:47,795 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:47,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:47,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1268022693, now seen corresponding path program 1 times [2024-05-12 13:12:47,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:47,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745730722] [2024-05-12 13:12:47,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:47,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:47,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:48,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:48,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:48,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745730722] [2024-05-12 13:12:48,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745730722] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:48,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:48,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:12:48,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718841958] [2024-05-12 13:12:48,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:48,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:12:48,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:48,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:12:48,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:12:48,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-05-12 13:12:48,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 119 transitions, 1064 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:48,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:48,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-05-12 13:12:48,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:49,391 INFO L124 PetriNetUnfolderBase]: 5076/7864 cut-off events. [2024-05-12 13:12:49,391 INFO L125 PetriNetUnfolderBase]: For 41570/41570 co-relation queries the response was YES. [2024-05-12 13:12:49,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30448 conditions, 7864 events. 5076/7864 cut-off events. For 41570/41570 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 47293 event pairs, 1924 based on Foata normal form. 3/7721 useless extension candidates. Maximal degree in co-relation 30403. Up to 7222 conditions per place. [2024-05-12 13:12:49,435 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 122 selfloop transitions, 14 changer transitions 0/144 dead transitions. [2024-05-12 13:12:49,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 144 transitions, 1426 flow [2024-05-12 13:12:49,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:12:49,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:12:49,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-05-12 13:12:49,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-05-12 13:12:49,437 INFO L175 Difference]: Start difference. First operand has 102 places, 119 transitions, 1064 flow. Second operand 6 states and 132 transitions. [2024-05-12 13:12:49,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 144 transitions, 1426 flow [2024-05-12 13:12:49,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 144 transitions, 1391 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-05-12 13:12:49,475 INFO L231 Difference]: Finished difference. Result has 105 places, 122 transitions, 1099 flow [2024-05-12 13:12:49,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1029, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1099, PETRI_PLACES=105, PETRI_TRANSITIONS=122} [2024-05-12 13:12:49,475 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 51 predicate places. [2024-05-12 13:12:49,475 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 122 transitions, 1099 flow [2024-05-12 13:12:49,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:49,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:49,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:12:49,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-05-12 13:12:49,476 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:49,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:49,476 INFO L85 PathProgramCache]: Analyzing trace with hash 423085678, now seen corresponding path program 1 times [2024-05-12 13:12:49,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:49,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205009860] [2024-05-12 13:12:49,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:49,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:49,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:50,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:50,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:50,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205009860] [2024-05-12 13:12:50,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205009860] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:50,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:50,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:12:50,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482574984] [2024-05-12 13:12:50,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:50,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:12:50,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:50,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:12:50,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:12:50,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-05-12 13:12:50,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 122 transitions, 1099 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:50,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:50,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-05-12 13:12:50,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:51,842 INFO L124 PetriNetUnfolderBase]: 4909/7801 cut-off events. [2024-05-12 13:12:51,842 INFO L125 PetriNetUnfolderBase]: For 51138/51142 co-relation queries the response was YES. [2024-05-12 13:12:51,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31666 conditions, 7801 events. 4909/7801 cut-off events. For 51138/51142 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 49300 event pairs, 772 based on Foata normal form. 20/7623 useless extension candidates. Maximal degree in co-relation 31620. Up to 5604 conditions per place. [2024-05-12 13:12:51,903 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 143 selfloop transitions, 36 changer transitions 0/192 dead transitions. [2024-05-12 13:12:51,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 192 transitions, 1757 flow [2024-05-12 13:12:51,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:12:51,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:12:51,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2024-05-12 13:12:51,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-05-12 13:12:51,905 INFO L175 Difference]: Start difference. First operand has 105 places, 122 transitions, 1099 flow. Second operand 8 states and 216 transitions. [2024-05-12 13:12:51,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 192 transitions, 1757 flow [2024-05-12 13:12:51,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 192 transitions, 1711 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-05-12 13:12:51,975 INFO L231 Difference]: Finished difference. Result has 110 places, 130 transitions, 1214 flow [2024-05-12 13:12:51,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1053, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1214, PETRI_PLACES=110, PETRI_TRANSITIONS=130} [2024-05-12 13:12:51,975 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 56 predicate places. [2024-05-12 13:12:51,975 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 130 transitions, 1214 flow [2024-05-12 13:12:51,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:51,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:51,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:12:51,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-05-12 13:12:51,976 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:51,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:51,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1373401028, now seen corresponding path program 2 times [2024-05-12 13:12:51,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:51,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553380858] [2024-05-12 13:12:51,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:51,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:51,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:52,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:52,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:52,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553380858] [2024-05-12 13:12:52,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553380858] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:52,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:52,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:12:52,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702081593] [2024-05-12 13:12:52,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:52,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:12:52,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:52,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:12:52,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:12:53,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-05-12 13:12:53,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 130 transitions, 1214 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:53,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:53,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-05-12 13:12:53,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:54,384 INFO L124 PetriNetUnfolderBase]: 5034/8020 cut-off events. [2024-05-12 13:12:54,384 INFO L125 PetriNetUnfolderBase]: For 58570/58574 co-relation queries the response was YES. [2024-05-12 13:12:54,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33402 conditions, 8020 events. 5034/8020 cut-off events. For 58570/58574 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 51352 event pairs, 1224 based on Foata normal form. 32/7867 useless extension candidates. Maximal degree in co-relation 33354. Up to 6441 conditions per place. [2024-05-12 13:12:54,429 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 146 selfloop transitions, 38 changer transitions 0/197 dead transitions. [2024-05-12 13:12:54,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 197 transitions, 1802 flow [2024-05-12 13:12:54,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:12:54,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:12:54,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 238 transitions. [2024-05-12 13:12:54,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5509259259259259 [2024-05-12 13:12:54,431 INFO L175 Difference]: Start difference. First operand has 110 places, 130 transitions, 1214 flow. Second operand 9 states and 238 transitions. [2024-05-12 13:12:54,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 197 transitions, 1802 flow [2024-05-12 13:12:54,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 197 transitions, 1767 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-05-12 13:12:54,510 INFO L231 Difference]: Finished difference. Result has 116 places, 132 transitions, 1292 flow [2024-05-12 13:12:54,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1179, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1292, PETRI_PLACES=116, PETRI_TRANSITIONS=132} [2024-05-12 13:12:54,511 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 62 predicate places. [2024-05-12 13:12:54,511 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 132 transitions, 1292 flow [2024-05-12 13:12:54,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:54,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:54,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:12:54,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-05-12 13:12:54,512 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:54,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:54,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1785513572, now seen corresponding path program 1 times [2024-05-12 13:12:54,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:54,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794890019] [2024-05-12 13:12:54,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:54,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:54,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:55,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:55,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:55,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794890019] [2024-05-12 13:12:55,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794890019] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:55,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:55,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:12:55,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513804755] [2024-05-12 13:12:55,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:55,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:12:55,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:55,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:12:55,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:12:55,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-05-12 13:12:55,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 132 transitions, 1292 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:55,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:55,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-05-12 13:12:55,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:56,257 INFO L124 PetriNetUnfolderBase]: 5702/8838 cut-off events. [2024-05-12 13:12:56,257 INFO L125 PetriNetUnfolderBase]: For 62558/62558 co-relation queries the response was YES. [2024-05-12 13:12:56,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37512 conditions, 8838 events. 5702/8838 cut-off events. For 62558/62558 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 54331 event pairs, 1907 based on Foata normal form. 1/8657 useless extension candidates. Maximal degree in co-relation 37462. Up to 8173 conditions per place. [2024-05-12 13:12:56,316 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 142 selfloop transitions, 18 changer transitions 0/168 dead transitions. [2024-05-12 13:12:56,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 168 transitions, 1800 flow [2024-05-12 13:12:56,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:12:56,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:12:56,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-05-12 13:12:56,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-05-12 13:12:56,318 INFO L175 Difference]: Start difference. First operand has 116 places, 132 transitions, 1292 flow. Second operand 6 states and 138 transitions. [2024-05-12 13:12:56,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 168 transitions, 1800 flow [2024-05-12 13:12:56,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 168 transitions, 1716 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-05-12 13:12:56,401 INFO L231 Difference]: Finished difference. Result has 116 places, 142 transitions, 1356 flow [2024-05-12 13:12:56,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1208, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1356, PETRI_PLACES=116, PETRI_TRANSITIONS=142} [2024-05-12 13:12:56,402 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 62 predicate places. [2024-05-12 13:12:56,402 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 142 transitions, 1356 flow [2024-05-12 13:12:56,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:56,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:56,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:12:56,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-05-12 13:12:56,402 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:56,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:56,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1763073952, now seen corresponding path program 1 times [2024-05-12 13:12:56,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:56,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112478593] [2024-05-12 13:12:56,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:56,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:56,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:57,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:57,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:57,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112478593] [2024-05-12 13:12:57,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112478593] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:57,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:57,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:12:57,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297425480] [2024-05-12 13:12:57,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:57,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:12:57,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:57,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:12:57,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:12:57,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-05-12 13:12:57,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 142 transitions, 1356 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:57,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:57,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-05-12 13:12:57,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:12:58,587 INFO L124 PetriNetUnfolderBase]: 5397/8599 cut-off events. [2024-05-12 13:12:58,588 INFO L125 PetriNetUnfolderBase]: For 69455/69475 co-relation queries the response was YES. [2024-05-12 13:12:58,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37202 conditions, 8599 events. 5397/8599 cut-off events. For 69455/69475 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 54824 event pairs, 1963 based on Foata normal form. 4/8416 useless extension candidates. Maximal degree in co-relation 37150. Up to 7625 conditions per place. [2024-05-12 13:12:58,660 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 151 selfloop transitions, 19 changer transitions 0/183 dead transitions. [2024-05-12 13:12:58,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 183 transitions, 1832 flow [2024-05-12 13:12:58,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:12:58,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:12:58,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-05-12 13:12:58,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.484375 [2024-05-12 13:12:58,661 INFO L175 Difference]: Start difference. First operand has 116 places, 142 transitions, 1356 flow. Second operand 8 states and 186 transitions. [2024-05-12 13:12:58,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 183 transitions, 1832 flow [2024-05-12 13:12:58,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 183 transitions, 1804 flow, removed 13 selfloop flow, removed 1 redundant places. [2024-05-12 13:12:58,773 INFO L231 Difference]: Finished difference. Result has 123 places, 144 transitions, 1405 flow [2024-05-12 13:12:58,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1328, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1405, PETRI_PLACES=123, PETRI_TRANSITIONS=144} [2024-05-12 13:12:58,774 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 69 predicate places. [2024-05-12 13:12:58,774 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 144 transitions, 1405 flow [2024-05-12 13:12:58,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:58,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:12:58,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:12:58,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-05-12 13:12:58,776 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:12:58,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:12:58,776 INFO L85 PathProgramCache]: Analyzing trace with hash -859747216, now seen corresponding path program 2 times [2024-05-12 13:12:58,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:12:58,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312048348] [2024-05-12 13:12:58,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:12:58,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:12:58,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:12:59,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:12:59,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:12:59,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312048348] [2024-05-12 13:12:59,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312048348] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:12:59,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:12:59,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:12:59,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382031511] [2024-05-12 13:12:59,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:12:59,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:12:59,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:12:59,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:12:59,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:12:59,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-05-12 13:12:59,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 144 transitions, 1405 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:12:59,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:12:59,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-05-12 13:12:59,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:13:01,150 INFO L124 PetriNetUnfolderBase]: 5442/8683 cut-off events. [2024-05-12 13:13:01,150 INFO L125 PetriNetUnfolderBase]: For 76789/76805 co-relation queries the response was YES. [2024-05-12 13:13:01,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38269 conditions, 8683 events. 5442/8683 cut-off events. For 76789/76805 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 55563 event pairs, 1842 based on Foata normal form. 4/8495 useless extension candidates. Maximal degree in co-relation 38214. Up to 7656 conditions per place. [2024-05-12 13:13:01,318 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 151 selfloop transitions, 27 changer transitions 0/191 dead transitions. [2024-05-12 13:13:01,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 191 transitions, 1915 flow [2024-05-12 13:13:01,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:13:01,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:13:01,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-05-12 13:13:01,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4921875 [2024-05-12 13:13:01,321 INFO L175 Difference]: Start difference. First operand has 123 places, 144 transitions, 1405 flow. Second operand 8 states and 189 transitions. [2024-05-12 13:13:01,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 191 transitions, 1915 flow [2024-05-12 13:13:01,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 191 transitions, 1859 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-05-12 13:13:01,421 INFO L231 Difference]: Finished difference. Result has 127 places, 149 transitions, 1473 flow [2024-05-12 13:13:01,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1349, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1473, PETRI_PLACES=127, PETRI_TRANSITIONS=149} [2024-05-12 13:13:01,421 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 73 predicate places. [2024-05-12 13:13:01,422 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 149 transitions, 1473 flow [2024-05-12 13:13:01,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:01,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:01,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:13:01,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-05-12 13:13:01,423 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:01,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:01,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1507467172, now seen corresponding path program 3 times [2024-05-12 13:13:01,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:01,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193028219] [2024-05-12 13:13:01,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:01,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:01,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:13:02,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:13:02,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:13:02,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193028219] [2024-05-12 13:13:02,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193028219] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:13:02,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:13:02,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:13:02,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073978323] [2024-05-12 13:13:02,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:13:02,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:13:02,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:13:02,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:13:02,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:13:02,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-05-12 13:13:02,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 149 transitions, 1473 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:02,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:13:02,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-05-12 13:13:02,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:13:04,109 INFO L124 PetriNetUnfolderBase]: 5434/8652 cut-off events. [2024-05-12 13:13:04,109 INFO L125 PetriNetUnfolderBase]: For 84065/84081 co-relation queries the response was YES. [2024-05-12 13:13:04,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39000 conditions, 8652 events. 5434/8652 cut-off events. For 84065/84081 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 55169 event pairs, 1950 based on Foata normal form. 4/8469 useless extension candidates. Maximal degree in co-relation 38943. Up to 7631 conditions per place. [2024-05-12 13:13:04,181 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 159 selfloop transitions, 24 changer transitions 0/196 dead transitions. [2024-05-12 13:13:04,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 196 transitions, 2035 flow [2024-05-12 13:13:04,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:13:04,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:13:04,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-05-12 13:13:04,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4947916666666667 [2024-05-12 13:13:04,183 INFO L175 Difference]: Start difference. First operand has 127 places, 149 transitions, 1473 flow. Second operand 8 states and 190 transitions. [2024-05-12 13:13:04,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 196 transitions, 2035 flow [2024-05-12 13:13:04,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 196 transitions, 1955 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-05-12 13:13:04,286 INFO L231 Difference]: Finished difference. Result has 131 places, 154 transitions, 1528 flow [2024-05-12 13:13:04,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1393, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1528, PETRI_PLACES=131, PETRI_TRANSITIONS=154} [2024-05-12 13:13:04,286 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 77 predicate places. [2024-05-12 13:13:04,287 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 154 transitions, 1528 flow [2024-05-12 13:13:04,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:04,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:04,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:13:04,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-05-12 13:13:04,287 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:04,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:04,288 INFO L85 PathProgramCache]: Analyzing trace with hash -860072716, now seen corresponding path program 4 times [2024-05-12 13:13:04,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:04,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341601500] [2024-05-12 13:13:04,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:04,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:04,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:13:05,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:13:05,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:13:05,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341601500] [2024-05-12 13:13:05,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341601500] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:13:05,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:13:05,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:13:05,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923773754] [2024-05-12 13:13:05,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:13:05,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:13:05,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:13:05,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:13:05,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:13:05,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-05-12 13:13:05,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 154 transitions, 1528 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:05,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:13:05,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-05-12 13:13:05,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:13:06,644 INFO L124 PetriNetUnfolderBase]: 5444/8695 cut-off events. [2024-05-12 13:13:06,644 INFO L125 PetriNetUnfolderBase]: For 91708/91724 co-relation queries the response was YES. [2024-05-12 13:13:06,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39961 conditions, 8695 events. 5444/8695 cut-off events. For 91708/91724 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 55714 event pairs, 1920 based on Foata normal form. 4/8503 useless extension candidates. Maximal degree in co-relation 39902. Up to 7608 conditions per place. [2024-05-12 13:13:06,712 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 154 selfloop transitions, 35 changer transitions 0/202 dead transitions. [2024-05-12 13:13:06,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 202 transitions, 2104 flow [2024-05-12 13:13:06,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:13:06,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:13:06,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-05-12 13:13:06,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4947916666666667 [2024-05-12 13:13:06,714 INFO L175 Difference]: Start difference. First operand has 131 places, 154 transitions, 1528 flow. Second operand 8 states and 190 transitions. [2024-05-12 13:13:06,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 202 transitions, 2104 flow [2024-05-12 13:13:06,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 202 transitions, 2023 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-05-12 13:13:06,817 INFO L231 Difference]: Finished difference. Result has 135 places, 159 transitions, 1626 flow [2024-05-12 13:13:06,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1447, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1626, PETRI_PLACES=135, PETRI_TRANSITIONS=159} [2024-05-12 13:13:06,818 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 81 predicate places. [2024-05-12 13:13:06,818 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 159 transitions, 1626 flow [2024-05-12 13:13:06,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:06,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:06,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:13:06,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-05-12 13:13:06,819 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:06,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:06,819 INFO L85 PathProgramCache]: Analyzing trace with hash -869010264, now seen corresponding path program 1 times [2024-05-12 13:13:06,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:06,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900554731] [2024-05-12 13:13:06,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:06,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:06,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:13:07,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:13:07,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:13:07,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900554731] [2024-05-12 13:13:07,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900554731] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:13:07,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:13:07,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:13:07,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91664354] [2024-05-12 13:13:07,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:13:07,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:13:07,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:13:07,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:13:07,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:13:07,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-05-12 13:13:07,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 159 transitions, 1626 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:07,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:13:07,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-05-12 13:13:07,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:13:08,888 INFO L124 PetriNetUnfolderBase]: 5368/8157 cut-off events. [2024-05-12 13:13:08,888 INFO L125 PetriNetUnfolderBase]: For 96026/96028 co-relation queries the response was YES. [2024-05-12 13:13:08,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39627 conditions, 8157 events. 5368/8157 cut-off events. For 96026/96028 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 48495 event pairs, 1209 based on Foata normal form. 2/8094 useless extension candidates. Maximal degree in co-relation 39566. Up to 7189 conditions per place. [2024-05-12 13:13:08,953 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 130 selfloop transitions, 53 changer transitions 0/196 dead transitions. [2024-05-12 13:13:08,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 196 transitions, 2112 flow [2024-05-12 13:13:08,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:13:08,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:13:08,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-05-12 13:13:08,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5486111111111112 [2024-05-12 13:13:08,955 INFO L175 Difference]: Start difference. First operand has 135 places, 159 transitions, 1626 flow. Second operand 6 states and 158 transitions. [2024-05-12 13:13:08,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 196 transitions, 2112 flow [2024-05-12 13:13:09,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 196 transitions, 2009 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-05-12 13:13:09,124 INFO L231 Difference]: Finished difference. Result has 136 places, 159 transitions, 1650 flow [2024-05-12 13:13:09,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1523, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1650, PETRI_PLACES=136, PETRI_TRANSITIONS=159} [2024-05-12 13:13:09,124 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 82 predicate places. [2024-05-12 13:13:09,125 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 159 transitions, 1650 flow [2024-05-12 13:13:09,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:09,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:09,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:13:09,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-05-12 13:13:09,125 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:09,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:09,126 INFO L85 PathProgramCache]: Analyzing trace with hash -2066997686, now seen corresponding path program 2 times [2024-05-12 13:13:09,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:09,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829908969] [2024-05-12 13:13:09,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:09,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:09,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:13:09,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:13:09,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:13:09,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829908969] [2024-05-12 13:13:09,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829908969] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:13:09,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:13:09,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:13:09,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689162505] [2024-05-12 13:13:09,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:13:09,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:13:09,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:13:09,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:13:09,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:13:09,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-05-12 13:13:09,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 159 transitions, 1650 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:09,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:13:09,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-05-12 13:13:09,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:13:11,027 INFO L124 PetriNetUnfolderBase]: 5775/9086 cut-off events. [2024-05-12 13:13:11,027 INFO L125 PetriNetUnfolderBase]: For 102917/102917 co-relation queries the response was YES. [2024-05-12 13:13:11,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42012 conditions, 9086 events. 5775/9086 cut-off events. For 102917/102917 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 57293 event pairs, 2156 based on Foata normal form. 1/8901 useless extension candidates. Maximal degree in co-relation 41950. Up to 8314 conditions per place. [2024-05-12 13:13:11,108 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 154 selfloop transitions, 15 changer transitions 0/177 dead transitions. [2024-05-12 13:13:11,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 177 transitions, 2056 flow [2024-05-12 13:13:11,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:13:11,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:13:11,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-05-12 13:13:11,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-05-12 13:13:11,110 INFO L175 Difference]: Start difference. First operand has 136 places, 159 transitions, 1650 flow. Second operand 7 states and 140 transitions. [2024-05-12 13:13:11,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 177 transitions, 2056 flow [2024-05-12 13:13:11,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 177 transitions, 1932 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-05-12 13:13:11,250 INFO L231 Difference]: Finished difference. Result has 139 places, 161 transitions, 1589 flow [2024-05-12 13:13:11,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1528, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1589, PETRI_PLACES=139, PETRI_TRANSITIONS=161} [2024-05-12 13:13:11,251 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 85 predicate places. [2024-05-12 13:13:11,251 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 161 transitions, 1589 flow [2024-05-12 13:13:11,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:11,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:11,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:13:11,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-05-12 13:13:11,252 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:11,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:11,252 INFO L85 PathProgramCache]: Analyzing trace with hash -2072704693, now seen corresponding path program 1 times [2024-05-12 13:13:11,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:11,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104454424] [2024-05-12 13:13:11,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:11,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:11,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:13:11,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:13:11,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:13:11,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104454424] [2024-05-12 13:13:11,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104454424] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:13:11,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:13:11,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:13:11,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104842980] [2024-05-12 13:13:11,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:13:11,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:13:11,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:13:11,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:13:11,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:13:11,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-05-12 13:13:11,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 161 transitions, 1589 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:11,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:13:11,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-05-12 13:13:11,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:13:13,073 INFO L124 PetriNetUnfolderBase]: 5792/9123 cut-off events. [2024-05-12 13:13:13,073 INFO L125 PetriNetUnfolderBase]: For 106050/106050 co-relation queries the response was YES. [2024-05-12 13:13:13,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41910 conditions, 9123 events. 5792/9123 cut-off events. For 106050/106050 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 57571 event pairs, 2137 based on Foata normal form. 1/8934 useless extension candidates. Maximal degree in co-relation 41846. Up to 8300 conditions per place. [2024-05-12 13:13:13,140 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 157 selfloop transitions, 25 changer transitions 0/190 dead transitions. [2024-05-12 13:13:13,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 190 transitions, 2123 flow [2024-05-12 13:13:13,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:13:13,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:13:13,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-05-12 13:13:13,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-05-12 13:13:13,142 INFO L175 Difference]: Start difference. First operand has 139 places, 161 transitions, 1589 flow. Second operand 6 states and 136 transitions. [2024-05-12 13:13:13,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 190 transitions, 2123 flow [2024-05-12 13:13:13,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 190 transitions, 2072 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-05-12 13:13:13,307 INFO L231 Difference]: Finished difference. Result has 140 places, 167 transitions, 1653 flow [2024-05-12 13:13:13,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1538, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1653, PETRI_PLACES=140, PETRI_TRANSITIONS=167} [2024-05-12 13:13:13,307 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 86 predicate places. [2024-05-12 13:13:13,307 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 167 transitions, 1653 flow [2024-05-12 13:13:13,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:13,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:13,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:13:13,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-05-12 13:13:13,308 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:13,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:13,308 INFO L85 PathProgramCache]: Analyzing trace with hash -883768859, now seen corresponding path program 2 times [2024-05-12 13:13:13,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:13,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973828339] [2024-05-12 13:13:13,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:13,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:13,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:13:13,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:13:13,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:13:13,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973828339] [2024-05-12 13:13:13,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973828339] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:13:13,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:13:13,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 13:13:13,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560260691] [2024-05-12 13:13:13,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:13:13,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 13:13:13,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:13:13,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 13:13:13,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 13:13:13,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-05-12 13:13:13,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 167 transitions, 1653 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:13,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:13:13,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-05-12 13:13:13,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:13:15,240 INFO L124 PetriNetUnfolderBase]: 5789/9114 cut-off events. [2024-05-12 13:13:15,240 INFO L125 PetriNetUnfolderBase]: For 113864/113866 co-relation queries the response was YES. [2024-05-12 13:13:15,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42941 conditions, 9114 events. 5789/9114 cut-off events. For 113864/113866 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 57450 event pairs, 2134 based on Foata normal form. 3/8929 useless extension candidates. Maximal degree in co-relation 42877. Up to 8297 conditions per place. [2024-05-12 13:13:15,312 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 153 selfloop transitions, 25 changer transitions 0/186 dead transitions. [2024-05-12 13:13:15,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 186 transitions, 2071 flow [2024-05-12 13:13:15,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 13:13:15,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 13:13:15,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-05-12 13:13:15,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-05-12 13:13:15,313 INFO L175 Difference]: Start difference. First operand has 140 places, 167 transitions, 1653 flow. Second operand 6 states and 132 transitions. [2024-05-12 13:13:15,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 186 transitions, 2071 flow [2024-05-12 13:13:15,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 186 transitions, 2021 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-05-12 13:13:15,500 INFO L231 Difference]: Finished difference. Result has 144 places, 167 transitions, 1660 flow [2024-05-12 13:13:15,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1603, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1660, PETRI_PLACES=144, PETRI_TRANSITIONS=167} [2024-05-12 13:13:15,500 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 90 predicate places. [2024-05-12 13:13:15,500 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 167 transitions, 1660 flow [2024-05-12 13:13:15,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:15,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:15,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:13:15,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-05-12 13:13:15,501 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:15,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:15,501 INFO L85 PathProgramCache]: Analyzing trace with hash 483357295, now seen corresponding path program 1 times [2024-05-12 13:13:15,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:15,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234213345] [2024-05-12 13:13:15,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:15,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:15,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:13:16,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:13:16,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:13:16,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234213345] [2024-05-12 13:13:16,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234213345] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:13:16,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:13:16,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:13:16,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965874666] [2024-05-12 13:13:16,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:13:16,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:13:16,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:13:16,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:13:16,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:13:16,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-05-12 13:13:16,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 167 transitions, 1660 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-05-12 13:13:16,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:13:16,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-05-12 13:13:16,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:13:17,724 INFO L124 PetriNetUnfolderBase]: 5858/9123 cut-off events. [2024-05-12 13:13:17,724 INFO L125 PetriNetUnfolderBase]: For 119001/119003 co-relation queries the response was YES. [2024-05-12 13:13:17,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43179 conditions, 9123 events. 5858/9123 cut-off events. For 119001/119003 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 56692 event pairs, 1760 based on Foata normal form. 4/8929 useless extension candidates. Maximal degree in co-relation 43113. Up to 8154 conditions per place. [2024-05-12 13:13:17,798 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 178 selfloop transitions, 42 changer transitions 0/228 dead transitions. [2024-05-12 13:13:17,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 228 transitions, 2566 flow [2024-05-12 13:13:17,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:13:17,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:13:17,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-05-12 13:13:17,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5059523809523809 [2024-05-12 13:13:17,800 INFO L175 Difference]: Start difference. First operand has 144 places, 167 transitions, 1660 flow. Second operand 7 states and 170 transitions. [2024-05-12 13:13:17,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 228 transitions, 2566 flow [2024-05-12 13:13:17,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 228 transitions, 2480 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-05-12 13:13:17,994 INFO L231 Difference]: Finished difference. Result has 148 places, 190 transitions, 1982 flow [2024-05-12 13:13:17,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1590, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1982, PETRI_PLACES=148, PETRI_TRANSITIONS=190} [2024-05-12 13:13:17,995 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 94 predicate places. [2024-05-12 13:13:17,995 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 190 transitions, 1982 flow [2024-05-12 13:13:17,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-05-12 13:13:17,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:17,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:13:17,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-05-12 13:13:17,996 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:17,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:17,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1002763981, now seen corresponding path program 1 times [2024-05-12 13:13:17,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:17,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13838827] [2024-05-12 13:13:17,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:17,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:18,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:13:19,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:13:19,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:13:19,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13838827] [2024-05-12 13:13:19,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13838827] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:13:19,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:13:19,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:13:19,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162001209] [2024-05-12 13:13:19,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:13:19,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:13:19,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:13:19,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:13:19,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:13:19,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-05-12 13:13:19,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 190 transitions, 1982 flow. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:19,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:13:19,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-05-12 13:13:19,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:13:20,590 INFO L124 PetriNetUnfolderBase]: 5687/8960 cut-off events. [2024-05-12 13:13:20,590 INFO L125 PetriNetUnfolderBase]: For 136817/136860 co-relation queries the response was YES. [2024-05-12 13:13:20,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45498 conditions, 8960 events. 5687/8960 cut-off events. For 136817/136860 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 56531 event pairs, 1519 based on Foata normal form. 7/8741 useless extension candidates. Maximal degree in co-relation 45429. Up to 7493 conditions per place. [2024-05-12 13:13:20,654 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 185 selfloop transitions, 43 changer transitions 0/248 dead transitions. [2024-05-12 13:13:20,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 248 transitions, 2730 flow [2024-05-12 13:13:20,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:13:20,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:13:20,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-05-12 13:13:20,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182291666666666 [2024-05-12 13:13:20,656 INFO L175 Difference]: Start difference. First operand has 148 places, 190 transitions, 1982 flow. Second operand 8 states and 199 transitions. [2024-05-12 13:13:20,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 248 transitions, 2730 flow [2024-05-12 13:13:20,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 248 transitions, 2674 flow, removed 27 selfloop flow, removed 1 redundant places. [2024-05-12 13:13:20,859 INFO L231 Difference]: Finished difference. Result has 157 places, 201 transitions, 2189 flow [2024-05-12 13:13:20,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1932, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2189, PETRI_PLACES=157, PETRI_TRANSITIONS=201} [2024-05-12 13:13:20,860 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 103 predicate places. [2024-05-12 13:13:20,860 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 201 transitions, 2189 flow [2024-05-12 13:13:20,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:20,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:20,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:13:20,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-05-12 13:13:20,861 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:20,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:20,862 INFO L85 PathProgramCache]: Analyzing trace with hash -35279517, now seen corresponding path program 2 times [2024-05-12 13:13:20,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:20,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175664059] [2024-05-12 13:13:20,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:20,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:20,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:13:21,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:13:21,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:13:21,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175664059] [2024-05-12 13:13:21,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175664059] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:13:21,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:13:21,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:13:21,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326016211] [2024-05-12 13:13:21,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:13:21,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:13:21,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:13:21,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:13:21,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:13:21,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-05-12 13:13:21,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 201 transitions, 2189 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-05-12 13:13:21,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:13:21,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-05-12 13:13:21,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:13:22,888 INFO L124 PetriNetUnfolderBase]: 6054/9426 cut-off events. [2024-05-12 13:13:22,888 INFO L125 PetriNetUnfolderBase]: For 144985/144987 co-relation queries the response was YES. [2024-05-12 13:13:22,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48643 conditions, 9426 events. 6054/9426 cut-off events. For 144985/144987 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 58856 event pairs, 1818 based on Foata normal form. 4/9226 useless extension candidates. Maximal degree in co-relation 48569. Up to 8396 conditions per place. [2024-05-12 13:13:22,984 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 185 selfloop transitions, 47 changer transitions 0/240 dead transitions. [2024-05-12 13:13:22,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 240 transitions, 2959 flow [2024-05-12 13:13:22,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:13:22,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:13:22,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-05-12 13:13:22,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-05-12 13:13:22,986 INFO L175 Difference]: Start difference. First operand has 157 places, 201 transitions, 2189 flow. Second operand 7 states and 164 transitions. [2024-05-12 13:13:22,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 240 transitions, 2959 flow [2024-05-12 13:13:23,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 240 transitions, 2909 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-05-12 13:13:23,291 INFO L231 Difference]: Finished difference. Result has 163 places, 209 transitions, 2349 flow [2024-05-12 13:13:23,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2139, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2349, PETRI_PLACES=163, PETRI_TRANSITIONS=209} [2024-05-12 13:13:23,292 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 109 predicate places. [2024-05-12 13:13:23,292 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 209 transitions, 2349 flow [2024-05-12 13:13:23,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-05-12 13:13:23,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:23,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:13:23,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-05-12 13:13:23,293 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:23,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:23,293 INFO L85 PathProgramCache]: Analyzing trace with hash -35279145, now seen corresponding path program 1 times [2024-05-12 13:13:23,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:23,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231832090] [2024-05-12 13:13:23,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:23,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:23,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:13:24,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:13:24,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:13:24,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231832090] [2024-05-12 13:13:24,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231832090] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:13:24,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:13:24,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:13:24,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509522593] [2024-05-12 13:13:24,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:13:24,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:13:24,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:13:24,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:13:24,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:13:24,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-05-12 13:13:24,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 209 transitions, 2349 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-05-12 13:13:24,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:13:24,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-05-12 13:13:24,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:13:25,311 INFO L124 PetriNetUnfolderBase]: 6150/9546 cut-off events. [2024-05-12 13:13:25,311 INFO L125 PetriNetUnfolderBase]: For 155617/155617 co-relation queries the response was YES. [2024-05-12 13:13:25,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50065 conditions, 9546 events. 6150/9546 cut-off events. For 155617/155617 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 59532 event pairs, 1821 based on Foata normal form. 3/9345 useless extension candidates. Maximal degree in co-relation 49988. Up to 8720 conditions per place. [2024-05-12 13:13:25,409 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 218 selfloop transitions, 27 changer transitions 0/253 dead transitions. [2024-05-12 13:13:25,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 253 transitions, 3127 flow [2024-05-12 13:13:25,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:13:25,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:13:25,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-05-12 13:13:25,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2024-05-12 13:13:25,410 INFO L175 Difference]: Start difference. First operand has 163 places, 209 transitions, 2349 flow. Second operand 7 states and 163 transitions. [2024-05-12 13:13:25,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 253 transitions, 3127 flow [2024-05-12 13:13:25,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 253 transitions, 3045 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-05-12 13:13:25,707 INFO L231 Difference]: Finished difference. Result has 168 places, 219 transitions, 2471 flow [2024-05-12 13:13:25,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2267, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2471, PETRI_PLACES=168, PETRI_TRANSITIONS=219} [2024-05-12 13:13:25,707 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 114 predicate places. [2024-05-12 13:13:25,707 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 219 transitions, 2471 flow [2024-05-12 13:13:25,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-05-12 13:13:25,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:25,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:13:25,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-05-12 13:13:25,708 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:25,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:25,709 INFO L85 PathProgramCache]: Analyzing trace with hash -895075507, now seen corresponding path program 2 times [2024-05-12 13:13:25,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:25,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961394916] [2024-05-12 13:13:25,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:25,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:25,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:13:26,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:13:26,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:13:26,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961394916] [2024-05-12 13:13:26,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961394916] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:13:26,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:13:26,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:13:26,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581801901] [2024-05-12 13:13:26,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:13:26,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:13:26,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:13:26,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:13:26,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:13:26,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-05-12 13:13:26,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 219 transitions, 2471 flow. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:26,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:13:26,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-05-12 13:13:26,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:13:28,151 INFO L124 PetriNetUnfolderBase]: 5936/9345 cut-off events. [2024-05-12 13:13:28,151 INFO L125 PetriNetUnfolderBase]: For 173787/173825 co-relation queries the response was YES. [2024-05-12 13:13:28,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51001 conditions, 9345 events. 5936/9345 cut-off events. For 173787/173825 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 59262 event pairs, 1523 based on Foata normal form. 11/9121 useless extension candidates. Maximal degree in co-relation 50922. Up to 7552 conditions per place. [2024-05-12 13:13:28,246 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 190 selfloop transitions, 58 changer transitions 0/270 dead transitions. [2024-05-12 13:13:28,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 270 transitions, 3338 flow [2024-05-12 13:13:28,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:13:28,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:13:28,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-05-12 13:13:28,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5267857142857143 [2024-05-12 13:13:28,248 INFO L175 Difference]: Start difference. First operand has 168 places, 219 transitions, 2471 flow. Second operand 7 states and 177 transitions. [2024-05-12 13:13:28,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 270 transitions, 3338 flow [2024-05-12 13:13:28,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 270 transitions, 3288 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-05-12 13:13:28,501 INFO L231 Difference]: Finished difference. Result has 175 places, 230 transitions, 2752 flow [2024-05-12 13:13:28,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2421, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2752, PETRI_PLACES=175, PETRI_TRANSITIONS=230} [2024-05-12 13:13:28,502 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 121 predicate places. [2024-05-12 13:13:28,502 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 230 transitions, 2752 flow [2024-05-12 13:13:28,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:28,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:28,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:13:28,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-05-12 13:13:28,503 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:28,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:28,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1514898015, now seen corresponding path program 3 times [2024-05-12 13:13:28,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:28,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881165396] [2024-05-12 13:13:28,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:28,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:28,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:13:29,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:13:29,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:13:29,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881165396] [2024-05-12 13:13:29,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881165396] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:13:29,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:13:29,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:13:29,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293520919] [2024-05-12 13:13:29,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:13:29,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:13:29,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:13:29,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:13:29,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:13:29,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-05-12 13:13:29,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 230 transitions, 2752 flow. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:29,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:13:29,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-05-12 13:13:29,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:13:30,971 INFO L124 PetriNetUnfolderBase]: 5900/9306 cut-off events. [2024-05-12 13:13:30,971 INFO L125 PetriNetUnfolderBase]: For 181171/181209 co-relation queries the response was YES. [2024-05-12 13:13:31,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52349 conditions, 9306 events. 5900/9306 cut-off events. For 181171/181209 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 59114 event pairs, 1577 based on Foata normal form. 7/9102 useless extension candidates. Maximal degree in co-relation 52265. Up to 7821 conditions per place. [2024-05-12 13:13:31,066 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 197 selfloop transitions, 53 changer transitions 0/272 dead transitions. [2024-05-12 13:13:31,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 272 transitions, 3406 flow [2024-05-12 13:13:31,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:13:31,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:13:31,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-05-12 13:13:31,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-05-12 13:13:31,068 INFO L175 Difference]: Start difference. First operand has 175 places, 230 transitions, 2752 flow. Second operand 7 states and 180 transitions. [2024-05-12 13:13:31,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 272 transitions, 3406 flow [2024-05-12 13:13:31,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 272 transitions, 3325 flow, removed 32 selfloop flow, removed 2 redundant places. [2024-05-12 13:13:31,467 INFO L231 Difference]: Finished difference. Result has 180 places, 231 transitions, 2799 flow [2024-05-12 13:13:31,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2671, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2799, PETRI_PLACES=180, PETRI_TRANSITIONS=231} [2024-05-12 13:13:31,468 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 126 predicate places. [2024-05-12 13:13:31,468 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 231 transitions, 2799 flow [2024-05-12 13:13:31,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:31,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:31,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:13:31,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-05-12 13:13:31,469 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:31,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:31,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1524995955, now seen corresponding path program 4 times [2024-05-12 13:13:31,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:31,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839704318] [2024-05-12 13:13:31,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:31,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:31,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:13:32,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:13:32,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:13:32,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839704318] [2024-05-12 13:13:32,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839704318] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:13:32,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:13:32,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:13:32,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125809553] [2024-05-12 13:13:32,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:13:32,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:13:32,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:13:32,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:13:32,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:13:32,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-05-12 13:13:32,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 231 transitions, 2799 flow. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:32,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:13:32,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-05-12 13:13:32,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:13:34,152 INFO L124 PetriNetUnfolderBase]: 5937/9451 cut-off events. [2024-05-12 13:13:34,153 INFO L125 PetriNetUnfolderBase]: For 180551/180609 co-relation queries the response was YES. [2024-05-12 13:13:34,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52429 conditions, 9451 events. 5937/9451 cut-off events. For 180551/180609 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 61078 event pairs, 1846 based on Foata normal form. 12/9246 useless extension candidates. Maximal degree in co-relation 52343. Up to 8240 conditions per place. [2024-05-12 13:13:34,260 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 225 selfloop transitions, 29 changer transitions 0/276 dead transitions. [2024-05-12 13:13:34,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 276 transitions, 3465 flow [2024-05-12 13:13:34,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:13:34,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:13:34,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-05-12 13:13:34,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4699074074074074 [2024-05-12 13:13:34,262 INFO L175 Difference]: Start difference. First operand has 180 places, 231 transitions, 2799 flow. Second operand 9 states and 203 transitions. [2024-05-12 13:13:34,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 276 transitions, 3465 flow [2024-05-12 13:13:34,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 276 transitions, 3355 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-05-12 13:13:34,586 INFO L231 Difference]: Finished difference. Result has 184 places, 233 transitions, 2788 flow [2024-05-12 13:13:34,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2689, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2788, PETRI_PLACES=184, PETRI_TRANSITIONS=233} [2024-05-12 13:13:34,587 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 130 predicate places. [2024-05-12 13:13:34,587 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 233 transitions, 2788 flow [2024-05-12 13:13:34,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:13:34,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:34,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:13:34,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-05-12 13:13:34,588 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:34,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:34,588 INFO L85 PathProgramCache]: Analyzing trace with hash 348027795, now seen corresponding path program 2 times [2024-05-12 13:13:34,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:34,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323588075] [2024-05-12 13:13:34,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:34,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:34,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:13:35,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:13:35,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:13:35,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323588075] [2024-05-12 13:13:35,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323588075] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:13:35,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:13:35,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:13:35,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747965449] [2024-05-12 13:13:35,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:13:35,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:13:35,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:13:35,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:13:35,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:13:35,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-05-12 13:13:35,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 233 transitions, 2788 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-05-12 13:13:35,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:13:35,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-05-12 13:13:35,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:13:36,764 INFO L124 PetriNetUnfolderBase]: 6280/9892 cut-off events. [2024-05-12 13:13:36,764 INFO L125 PetriNetUnfolderBase]: For 186758/186758 co-relation queries the response was YES. [2024-05-12 13:13:36,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54530 conditions, 9892 events. 6280/9892 cut-off events. For 186758/186758 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 63133 event pairs, 2101 based on Foata normal form. 3/9684 useless extension candidates. Maximal degree in co-relation 54443. Up to 8991 conditions per place. [2024-05-12 13:13:36,868 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 231 selfloop transitions, 18 changer transitions 0/257 dead transitions. [2024-05-12 13:13:36,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 257 transitions, 3400 flow [2024-05-12 13:13:36,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:13:36,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:13:36,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-05-12 13:13:36,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-05-12 13:13:36,869 INFO L175 Difference]: Start difference. First operand has 184 places, 233 transitions, 2788 flow. Second operand 7 states and 148 transitions. [2024-05-12 13:13:36,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 257 transitions, 3400 flow [2024-05-12 13:13:37,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 257 transitions, 3330 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-05-12 13:13:37,313 INFO L231 Difference]: Finished difference. Result has 185 places, 236 transitions, 2818 flow [2024-05-12 13:13:37,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2718, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2818, PETRI_PLACES=185, PETRI_TRANSITIONS=236} [2024-05-12 13:13:37,313 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 131 predicate places. [2024-05-12 13:13:37,313 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 236 transitions, 2818 flow [2024-05-12 13:13:37,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-05-12 13:13:37,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:37,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:13:37,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-05-12 13:13:37,314 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:37,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:37,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1200510953, now seen corresponding path program 3 times [2024-05-12 13:13:37,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:37,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624051974] [2024-05-12 13:13:37,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:37,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:37,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:13:38,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:13:38,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:13:38,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624051974] [2024-05-12 13:13:38,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624051974] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:13:38,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:13:38,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:13:38,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471701885] [2024-05-12 13:13:38,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:13:38,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:13:38,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:13:38,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:13:38,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:13:38,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-05-12 13:13:38,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 236 transitions, 2818 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-05-12 13:13:38,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:13:38,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-05-12 13:13:38,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:13:39,585 INFO L124 PetriNetUnfolderBase]: 6276/9888 cut-off events. [2024-05-12 13:13:39,586 INFO L125 PetriNetUnfolderBase]: For 192817/192819 co-relation queries the response was YES. [2024-05-12 13:13:39,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54522 conditions, 9888 events. 6276/9888 cut-off events. For 192817/192819 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 63173 event pairs, 2098 based on Foata normal form. 4/9681 useless extension candidates. Maximal degree in co-relation 54434. Up to 8933 conditions per place. [2024-05-12 13:13:39,685 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 219 selfloop transitions, 31 changer transitions 0/258 dead transitions. [2024-05-12 13:13:39,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 258 transitions, 3458 flow [2024-05-12 13:13:39,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:13:39,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:13:39,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-05-12 13:13:39,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4296875 [2024-05-12 13:13:39,686 INFO L175 Difference]: Start difference. First operand has 185 places, 236 transitions, 2818 flow. Second operand 8 states and 165 transitions. [2024-05-12 13:13:39,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 258 transitions, 3458 flow [2024-05-12 13:13:40,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 258 transitions, 3355 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-05-12 13:13:40,121 INFO L231 Difference]: Finished difference. Result has 188 places, 236 transitions, 2785 flow [2024-05-12 13:13:40,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2715, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2785, PETRI_PLACES=188, PETRI_TRANSITIONS=236} [2024-05-12 13:13:40,122 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 134 predicate places. [2024-05-12 13:13:40,122 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 236 transitions, 2785 flow [2024-05-12 13:13:40,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-05-12 13:13:40,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:40,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:13:40,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-05-12 13:13:40,123 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:40,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:40,123 INFO L85 PathProgramCache]: Analyzing trace with hash 347583255, now seen corresponding path program 3 times [2024-05-12 13:13:40,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:40,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701725627] [2024-05-12 13:13:40,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:40,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:40,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:13:40,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:13:40,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:13:40,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701725627] [2024-05-12 13:13:40,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701725627] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:13:40,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:13:40,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:13:40,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664773976] [2024-05-12 13:13:40,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:13:40,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:13:40,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:13:40,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:13:40,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:13:40,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-05-12 13:13:40,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 236 transitions, 2785 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-05-12 13:13:40,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:13:40,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-05-12 13:13:40,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:13:42,345 INFO L124 PetriNetUnfolderBase]: 6267/9863 cut-off events. [2024-05-12 13:13:42,346 INFO L125 PetriNetUnfolderBase]: For 196676/196676 co-relation queries the response was YES. [2024-05-12 13:13:42,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54255 conditions, 9863 events. 6267/9863 cut-off events. For 196676/196676 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 62874 event pairs, 2089 based on Foata normal form. 3/9658 useless extension candidates. Maximal degree in co-relation 54167. Up to 8932 conditions per place. [2024-05-12 13:13:42,440 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 230 selfloop transitions, 23 changer transitions 0/261 dead transitions. [2024-05-12 13:13:42,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 261 transitions, 3377 flow [2024-05-12 13:13:42,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:13:42,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:13:42,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-05-12 13:13:42,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-05-12 13:13:42,442 INFO L175 Difference]: Start difference. First operand has 188 places, 236 transitions, 2785 flow. Second operand 7 states and 153 transitions. [2024-05-12 13:13:42,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 261 transitions, 3377 flow [2024-05-12 13:13:42,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 261 transitions, 3242 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-05-12 13:13:42,810 INFO L231 Difference]: Finished difference. Result has 188 places, 236 transitions, 2702 flow [2024-05-12 13:13:42,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2650, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2702, PETRI_PLACES=188, PETRI_TRANSITIONS=236} [2024-05-12 13:13:42,811 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 134 predicate places. [2024-05-12 13:13:42,811 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 236 transitions, 2702 flow [2024-05-12 13:13:42,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-05-12 13:13:42,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:42,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:13:42,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-05-12 13:13:42,811 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:42,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:42,812 INFO L85 PathProgramCache]: Analyzing trace with hash 170545882, now seen corresponding path program 1 times [2024-05-12 13:13:42,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:42,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758333401] [2024-05-12 13:13:42,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:42,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:42,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:13:43,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:13:43,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:13:43,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758333401] [2024-05-12 13:13:43,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758333401] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:13:43,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:13:43,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:13:43,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847479382] [2024-05-12 13:13:43,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:13:43,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:13:43,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:13:43,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:13:43,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:13:43,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-05-12 13:13:43,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 236 transitions, 2702 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-05-12 13:13:43,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:13:43,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-05-12 13:13:43,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:13:45,190 INFO L124 PetriNetUnfolderBase]: 6301/9950 cut-off events. [2024-05-12 13:13:45,190 INFO L125 PetriNetUnfolderBase]: For 201895/201895 co-relation queries the response was YES. [2024-05-12 13:13:45,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54289 conditions, 9950 events. 6301/9950 cut-off events. For 201895/201895 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 63820 event pairs, 2073 based on Foata normal form. 2/9732 useless extension candidates. Maximal degree in co-relation 54203. Up to 8984 conditions per place. [2024-05-12 13:13:45,283 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 235 selfloop transitions, 26 changer transitions 0/269 dead transitions. [2024-05-12 13:13:45,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 269 transitions, 3342 flow [2024-05-12 13:13:45,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:13:45,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:13:45,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-05-12 13:13:45,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-05-12 13:13:45,285 INFO L175 Difference]: Start difference. First operand has 188 places, 236 transitions, 2702 flow. Second operand 7 states and 157 transitions. [2024-05-12 13:13:45,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 269 transitions, 3342 flow [2024-05-12 13:13:45,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 269 transitions, 3259 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-05-12 13:13:45,680 INFO L231 Difference]: Finished difference. Result has 189 places, 239 transitions, 2717 flow [2024-05-12 13:13:45,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2619, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2717, PETRI_PLACES=189, PETRI_TRANSITIONS=239} [2024-05-12 13:13:45,680 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 135 predicate places. [2024-05-12 13:13:45,680 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 239 transitions, 2717 flow [2024-05-12 13:13:45,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-05-12 13:13:45,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:45,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:13:45,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-05-12 13:13:45,681 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:45,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:45,681 INFO L85 PathProgramCache]: Analyzing trace with hash 170665852, now seen corresponding path program 2 times [2024-05-12 13:13:45,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:45,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948072662] [2024-05-12 13:13:45,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:45,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:45,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:13:46,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:13:46,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:13:46,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948072662] [2024-05-12 13:13:46,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948072662] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:13:46,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:13:46,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:13:46,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340293702] [2024-05-12 13:13:46,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:13:46,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:13:46,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:13:46,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:13:46,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:13:46,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-05-12 13:13:46,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 239 transitions, 2717 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-05-12 13:13:46,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:13:46,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-05-12 13:13:46,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:13:48,094 INFO L124 PetriNetUnfolderBase]: 6335/10011 cut-off events. [2024-05-12 13:13:48,095 INFO L125 PetriNetUnfolderBase]: For 211408/211408 co-relation queries the response was YES. [2024-05-12 13:13:48,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55380 conditions, 10011 events. 6335/10011 cut-off events. For 211408/211408 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 64380 event pairs, 2075 based on Foata normal form. 2/9789 useless extension candidates. Maximal degree in co-relation 55293. Up to 8950 conditions per place. [2024-05-12 13:13:48,191 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 225 selfloop transitions, 44 changer transitions 0/277 dead transitions. [2024-05-12 13:13:48,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 277 transitions, 3524 flow [2024-05-12 13:13:48,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:13:48,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:13:48,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-05-12 13:13:48,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-05-12 13:13:48,193 INFO L175 Difference]: Start difference. First operand has 189 places, 239 transitions, 2717 flow. Second operand 7 states and 160 transitions. [2024-05-12 13:13:48,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 277 transitions, 3524 flow [2024-05-12 13:13:48,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 277 transitions, 3454 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-05-12 13:13:48,600 INFO L231 Difference]: Finished difference. Result has 191 places, 245 transitions, 2824 flow [2024-05-12 13:13:48,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2647, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2824, PETRI_PLACES=191, PETRI_TRANSITIONS=245} [2024-05-12 13:13:48,601 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 137 predicate places. [2024-05-12 13:13:48,601 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 245 transitions, 2824 flow [2024-05-12 13:13:48,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-05-12 13:13:48,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:48,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:13:48,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-05-12 13:13:48,602 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:48,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:48,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1194296538, now seen corresponding path program 1 times [2024-05-12 13:13:48,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:48,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477456819] [2024-05-12 13:13:48,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:48,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:48,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:13:49,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:13:49,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:13:49,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477456819] [2024-05-12 13:13:49,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477456819] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:13:49,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:13:49,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:13:49,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432821559] [2024-05-12 13:13:49,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:13:49,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:13:49,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:13:49,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:13:49,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:13:49,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-05-12 13:13:49,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 245 transitions, 2824 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-05-12 13:13:49,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:13:49,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-05-12 13:13:49,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:13:51,128 INFO L124 PetriNetUnfolderBase]: 6386/10084 cut-off events. [2024-05-12 13:13:51,128 INFO L125 PetriNetUnfolderBase]: For 224604/224604 co-relation queries the response was YES. [2024-05-12 13:13:51,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56738 conditions, 10084 events. 6386/10084 cut-off events. For 224604/224604 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 64741 event pairs, 2078 based on Foata normal form. 3/9862 useless extension candidates. Maximal degree in co-relation 56650. Up to 9006 conditions per place. [2024-05-12 13:13:51,282 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 240 selfloop transitions, 38 changer transitions 0/286 dead transitions. [2024-05-12 13:13:51,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 286 transitions, 3649 flow [2024-05-12 13:13:51,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:13:51,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:13:51,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-05-12 13:13:51,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2024-05-12 13:13:51,288 INFO L175 Difference]: Start difference. First operand has 191 places, 245 transitions, 2824 flow. Second operand 7 states and 163 transitions. [2024-05-12 13:13:51,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 286 transitions, 3649 flow [2024-05-12 13:13:51,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 286 transitions, 3583 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-05-12 13:13:51,777 INFO L231 Difference]: Finished difference. Result has 195 places, 251 transitions, 2915 flow [2024-05-12 13:13:51,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2762, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2915, PETRI_PLACES=195, PETRI_TRANSITIONS=251} [2024-05-12 13:13:51,778 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 141 predicate places. [2024-05-12 13:13:51,778 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 251 transitions, 2915 flow [2024-05-12 13:13:51,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-05-12 13:13:51,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:51,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:13:51,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-05-12 13:13:51,779 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:51,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:51,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1653549094, now seen corresponding path program 3 times [2024-05-12 13:13:51,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:51,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349478075] [2024-05-12 13:13:51,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:51,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:51,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:13:52,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:13:52,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:13:52,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349478075] [2024-05-12 13:13:52,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349478075] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:13:52,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:13:52,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:13:52,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627509288] [2024-05-12 13:13:52,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:13:52,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:13:52,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:13:52,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:13:52,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:13:52,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-05-12 13:13:52,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 251 transitions, 2915 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-05-12 13:13:52,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:13:52,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-05-12 13:13:52,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:13:54,107 INFO L124 PetriNetUnfolderBase]: 6380/10073 cut-off events. [2024-05-12 13:13:54,107 INFO L125 PetriNetUnfolderBase]: For 232208/232210 co-relation queries the response was YES. [2024-05-12 13:13:54,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57418 conditions, 10073 events. 6380/10073 cut-off events. For 232208/232210 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 64692 event pairs, 2079 based on Foata normal form. 2/9853 useless extension candidates. Maximal degree in co-relation 57328. Up to 9014 conditions per place. [2024-05-12 13:13:54,225 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 226 selfloop transitions, 44 changer transitions 0/278 dead transitions. [2024-05-12 13:13:54,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 278 transitions, 3552 flow [2024-05-12 13:13:54,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:13:54,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:13:54,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-05-12 13:13:54,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-05-12 13:13:54,242 INFO L175 Difference]: Start difference. First operand has 195 places, 251 transitions, 2915 flow. Second operand 7 states and 156 transitions. [2024-05-12 13:13:54,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 278 transitions, 3552 flow [2024-05-12 13:13:54,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 278 transitions, 3483 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-05-12 13:13:54,700 INFO L231 Difference]: Finished difference. Result has 199 places, 251 transitions, 2941 flow [2024-05-12 13:13:54,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2846, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2941, PETRI_PLACES=199, PETRI_TRANSITIONS=251} [2024-05-12 13:13:54,700 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 145 predicate places. [2024-05-12 13:13:54,701 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 251 transitions, 2941 flow [2024-05-12 13:13:54,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-05-12 13:13:54,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:54,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:13:54,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-05-12 13:13:54,701 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:54,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:54,702 INFO L85 PathProgramCache]: Analyzing trace with hash 348034708, now seen corresponding path program 2 times [2024-05-12 13:13:54,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:54,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769989088] [2024-05-12 13:13:54,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:54,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:54,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:13:55,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:13:55,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:13:55,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769989088] [2024-05-12 13:13:55,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769989088] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:13:55,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:13:55,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:13:55,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31638609] [2024-05-12 13:13:55,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:13:55,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:13:55,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:13:55,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:13:55,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:13:55,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-05-12 13:13:55,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 251 transitions, 2941 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-05-12 13:13:55,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:13:55,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-05-12 13:13:55,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:13:57,111 INFO L124 PetriNetUnfolderBase]: 6431/10150 cut-off events. [2024-05-12 13:13:57,111 INFO L125 PetriNetUnfolderBase]: For 240459/240461 co-relation queries the response was YES. [2024-05-12 13:13:57,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57967 conditions, 10150 events. 6431/10150 cut-off events. For 240459/240461 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 65210 event pairs, 2066 based on Foata normal form. 5/9930 useless extension candidates. Maximal degree in co-relation 57875. Up to 9040 conditions per place. [2024-05-12 13:13:57,230 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 231 selfloop transitions, 43 changer transitions 0/282 dead transitions. [2024-05-12 13:13:57,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 282 transitions, 3691 flow [2024-05-12 13:13:57,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:13:57,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:13:57,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-05-12 13:13:57,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-05-12 13:13:57,231 INFO L175 Difference]: Start difference. First operand has 199 places, 251 transitions, 2941 flow. Second operand 7 states and 157 transitions. [2024-05-12 13:13:57,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 282 transitions, 3691 flow [2024-05-12 13:13:57,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 282 transitions, 3555 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-05-12 13:13:57,685 INFO L231 Difference]: Finished difference. Result has 199 places, 254 transitions, 2932 flow [2024-05-12 13:13:57,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2805, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2932, PETRI_PLACES=199, PETRI_TRANSITIONS=254} [2024-05-12 13:13:57,686 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 145 predicate places. [2024-05-12 13:13:57,687 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 254 transitions, 2932 flow [2024-05-12 13:13:57,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-05-12 13:13:57,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:13:57,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:13:57,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-05-12 13:13:57,687 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:13:57,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:13:57,688 INFO L85 PathProgramCache]: Analyzing trace with hash 347797558, now seen corresponding path program 3 times [2024-05-12 13:13:57,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:13:57,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72284580] [2024-05-12 13:13:57,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:13:57,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:13:57,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:13:58,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:13:58,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:13:58,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72284580] [2024-05-12 13:13:58,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72284580] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:13:58,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:13:58,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:13:58,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618577031] [2024-05-12 13:13:58,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:13:58,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:13:58,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:13:58,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:13:58,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:13:58,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-05-12 13:13:58,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 254 transitions, 2932 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-05-12 13:13:58,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:13:58,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-05-12 13:13:58,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:14:00,177 INFO L124 PetriNetUnfolderBase]: 6422/10138 cut-off events. [2024-05-12 13:14:00,177 INFO L125 PetriNetUnfolderBase]: For 246411/246413 co-relation queries the response was YES. [2024-05-12 13:14:00,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57958 conditions, 10138 events. 6422/10138 cut-off events. For 246411/246413 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 65183 event pairs, 2064 based on Foata normal form. 5/9918 useless extension candidates. Maximal degree in co-relation 57866. Up to 9033 conditions per place. [2024-05-12 13:14:00,278 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 236 selfloop transitions, 41 changer transitions 0/285 dead transitions. [2024-05-12 13:14:00,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 285 transitions, 3605 flow [2024-05-12 13:14:00,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:14:00,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:14:00,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-05-12 13:14:00,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732142857142857 [2024-05-12 13:14:00,280 INFO L175 Difference]: Start difference. First operand has 199 places, 254 transitions, 2932 flow. Second operand 7 states and 159 transitions. [2024-05-12 13:14:00,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 285 transitions, 3605 flow [2024-05-12 13:14:00,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 285 transitions, 3501 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-05-12 13:14:00,779 INFO L231 Difference]: Finished difference. Result has 202 places, 254 transitions, 2917 flow [2024-05-12 13:14:00,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2828, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2917, PETRI_PLACES=202, PETRI_TRANSITIONS=254} [2024-05-12 13:14:00,780 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 148 predicate places. [2024-05-12 13:14:00,780 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 254 transitions, 2917 flow [2024-05-12 13:14:00,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-05-12 13:14:00,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:14:00,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:14:00,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-05-12 13:14:00,780 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:14:00,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:14:00,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1103186487, now seen corresponding path program 1 times [2024-05-12 13:14:00,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:14:00,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538391982] [2024-05-12 13:14:00,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:14:00,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:14:00,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:14:01,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:14:01,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:14:01,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538391982] [2024-05-12 13:14:01,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538391982] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:14:01,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:14:01,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:14:01,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623900574] [2024-05-12 13:14:01,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:14:01,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:14:01,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:14:01,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:14:01,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:14:01,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-05-12 13:14:01,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 254 transitions, 2917 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:01,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:14:01,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-05-12 13:14:01,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:14:03,551 INFO L124 PetriNetUnfolderBase]: 6481/10010 cut-off events. [2024-05-12 13:14:03,551 INFO L125 PetriNetUnfolderBase]: For 253821/253823 co-relation queries the response was YES. [2024-05-12 13:14:03,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58235 conditions, 10010 events. 6481/10010 cut-off events. For 253821/253823 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 62371 event pairs, 1822 based on Foata normal form. 4/9818 useless extension candidates. Maximal degree in co-relation 58142. Up to 8876 conditions per place. [2024-05-12 13:14:03,671 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 246 selfloop transitions, 63 changer transitions 0/317 dead transitions. [2024-05-12 13:14:03,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 317 transitions, 4023 flow [2024-05-12 13:14:03,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:14:03,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:14:03,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-05-12 13:14:03,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023148148148148 [2024-05-12 13:14:03,673 INFO L175 Difference]: Start difference. First operand has 202 places, 254 transitions, 2917 flow. Second operand 9 states and 217 transitions. [2024-05-12 13:14:03,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 317 transitions, 4023 flow [2024-05-12 13:14:04,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 317 transitions, 3907 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-05-12 13:14:04,423 INFO L231 Difference]: Finished difference. Result has 205 places, 264 transitions, 3087 flow [2024-05-12 13:14:04,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2801, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3087, PETRI_PLACES=205, PETRI_TRANSITIONS=264} [2024-05-12 13:14:04,424 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 151 predicate places. [2024-05-12 13:14:04,424 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 264 transitions, 3087 flow [2024-05-12 13:14:04,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:04,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:14:04,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:14:04,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-05-12 13:14:04,425 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:14:04,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:14:04,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1102917376, now seen corresponding path program 1 times [2024-05-12 13:14:04,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:14:04,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823770116] [2024-05-12 13:14:04,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:14:04,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:14:04,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:14:05,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:14:05,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:14:05,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823770116] [2024-05-12 13:14:05,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823770116] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:14:05,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:14:05,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:14:05,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330422287] [2024-05-12 13:14:05,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:14:05,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:14:05,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:14:05,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:14:05,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:14:05,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-05-12 13:14:05,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 264 transitions, 3087 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:05,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:14:05,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-05-12 13:14:05,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:14:06,899 INFO L124 PetriNetUnfolderBase]: 6778/10481 cut-off events. [2024-05-12 13:14:06,899 INFO L125 PetriNetUnfolderBase]: For 282869/282871 co-relation queries the response was YES. [2024-05-12 13:14:06,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62657 conditions, 10481 events. 6778/10481 cut-off events. For 282869/282871 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 65878 event pairs, 1876 based on Foata normal form. 8/10275 useless extension candidates. Maximal degree in co-relation 62562. Up to 8837 conditions per place. [2024-05-12 13:14:07,034 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 252 selfloop transitions, 72 changer transitions 0/332 dead transitions. [2024-05-12 13:14:07,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 332 transitions, 4293 flow [2024-05-12 13:14:07,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:14:07,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:14:07,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-05-12 13:14:07,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182291666666666 [2024-05-12 13:14:07,045 INFO L175 Difference]: Start difference. First operand has 205 places, 264 transitions, 3087 flow. Second operand 8 states and 199 transitions. [2024-05-12 13:14:07,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 332 transitions, 4293 flow [2024-05-12 13:14:07,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 332 transitions, 4180 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-05-12 13:14:07,704 INFO L231 Difference]: Finished difference. Result has 211 places, 284 transitions, 3436 flow [2024-05-12 13:14:07,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2974, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3436, PETRI_PLACES=211, PETRI_TRANSITIONS=284} [2024-05-12 13:14:07,704 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 157 predicate places. [2024-05-12 13:14:07,705 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 284 transitions, 3436 flow [2024-05-12 13:14:07,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:07,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:14:07,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:14:07,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-05-12 13:14:07,705 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:14:07,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:14:07,706 INFO L85 PathProgramCache]: Analyzing trace with hash 2108227005, now seen corresponding path program 1 times [2024-05-12 13:14:07,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:14:07,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790264244] [2024-05-12 13:14:07,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:14:07,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:14:07,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:14:08,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:14:08,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:14:08,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790264244] [2024-05-12 13:14:08,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790264244] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:14:08,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:14:08,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:14:08,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765387386] [2024-05-12 13:14:08,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:14:08,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:14:08,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:14:08,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:14:08,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:14:08,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-05-12 13:14:08,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 284 transitions, 3436 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-05-12 13:14:08,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:14:08,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-05-12 13:14:08,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:14:10,075 INFO L124 PetriNetUnfolderBase]: 6852/10545 cut-off events. [2024-05-12 13:14:10,075 INFO L125 PetriNetUnfolderBase]: For 304777/304779 co-relation queries the response was YES. [2024-05-12 13:14:10,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66441 conditions, 10545 events. 6852/10545 cut-off events. For 304777/304779 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 65994 event pairs, 1880 based on Foata normal form. 4/10337 useless extension candidates. Maximal degree in co-relation 66342. Up to 9448 conditions per place. [2024-05-12 13:14:10,204 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 261 selfloop transitions, 59 changer transitions 0/328 dead transitions. [2024-05-12 13:14:10,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 328 transitions, 4535 flow [2024-05-12 13:14:10,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:14:10,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:14:10,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-05-12 13:14:10,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49702380952380953 [2024-05-12 13:14:10,206 INFO L175 Difference]: Start difference. First operand has 211 places, 284 transitions, 3436 flow. Second operand 7 states and 167 transitions. [2024-05-12 13:14:10,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 328 transitions, 4535 flow [2024-05-12 13:14:10,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 328 transitions, 4456 flow, removed 36 selfloop flow, removed 2 redundant places. [2024-05-12 13:14:10,866 INFO L231 Difference]: Finished difference. Result has 217 places, 294 transitions, 3668 flow [2024-05-12 13:14:10,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3357, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3668, PETRI_PLACES=217, PETRI_TRANSITIONS=294} [2024-05-12 13:14:10,866 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 163 predicate places. [2024-05-12 13:14:10,866 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 294 transitions, 3668 flow [2024-05-12 13:14:10,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-05-12 13:14:10,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:14:10,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:14:10,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-05-12 13:14:10,867 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:14:10,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:14:10,867 INFO L85 PathProgramCache]: Analyzing trace with hash 2108434395, now seen corresponding path program 2 times [2024-05-12 13:14:10,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:14:10,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413057641] [2024-05-12 13:14:10,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:14:10,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:14:10,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:14:11,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:14:11,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:14:11,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413057641] [2024-05-12 13:14:11,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413057641] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:14:11,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:14:11,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:14:11,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281742287] [2024-05-12 13:14:11,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:14:11,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:14:11,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:14:11,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:14:11,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:14:11,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-05-12 13:14:11,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 294 transitions, 3668 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-05-12 13:14:11,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:14:11,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-05-12 13:14:11,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:14:13,263 INFO L124 PetriNetUnfolderBase]: 6846/10529 cut-off events. [2024-05-12 13:14:13,263 INFO L125 PetriNetUnfolderBase]: For 310523/310525 co-relation queries the response was YES. [2024-05-12 13:14:13,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66416 conditions, 10529 events. 6846/10529 cut-off events. For 310523/310525 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 65802 event pairs, 1879 based on Foata normal form. 4/10323 useless extension candidates. Maximal degree in co-relation 66313. Up to 9443 conditions per place. [2024-05-12 13:14:13,392 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 262 selfloop transitions, 55 changer transitions 0/325 dead transitions. [2024-05-12 13:14:13,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 325 transitions, 4594 flow [2024-05-12 13:14:13,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:14:13,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:14:13,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-05-12 13:14:13,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-05-12 13:14:13,394 INFO L175 Difference]: Start difference. First operand has 217 places, 294 transitions, 3668 flow. Second operand 7 states and 164 transitions. [2024-05-12 13:14:13,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 325 transitions, 4594 flow [2024-05-12 13:14:14,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 325 transitions, 4507 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-05-12 13:14:14,155 INFO L231 Difference]: Finished difference. Result has 221 places, 294 transitions, 3700 flow [2024-05-12 13:14:14,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3581, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3700, PETRI_PLACES=221, PETRI_TRANSITIONS=294} [2024-05-12 13:14:14,155 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 167 predicate places. [2024-05-12 13:14:14,155 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 294 transitions, 3700 flow [2024-05-12 13:14:14,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-05-12 13:14:14,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:14:14,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:14:14,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-05-12 13:14:14,156 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:14:14,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:14:14,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1020911619, now seen corresponding path program 1 times [2024-05-12 13:14:14,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:14:14,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147440547] [2024-05-12 13:14:14,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:14:14,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:14:14,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:14:15,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:14:15,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:14:15,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147440547] [2024-05-12 13:14:15,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147440547] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:14:15,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:14:15,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:14:15,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697882227] [2024-05-12 13:14:15,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:14:15,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:14:15,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:14:15,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:14:15,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:14:15,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-05-12 13:14:15,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 294 transitions, 3700 flow. Second operand has 11 states, 11 states have (on average 13.454545454545455) internal successors, (148), 11 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:15,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:14:15,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-05-12 13:14:15,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:14:17,528 INFO L124 PetriNetUnfolderBase]: 7186/10780 cut-off events. [2024-05-12 13:14:17,528 INFO L125 PetriNetUnfolderBase]: For 337371/337399 co-relation queries the response was YES. [2024-05-12 13:14:17,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69870 conditions, 10780 events. 7186/10780 cut-off events. For 337371/337399 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 65477 event pairs, 1394 based on Foata normal form. 14/10686 useless extension candidates. Maximal degree in co-relation 69766. Up to 8606 conditions per place. [2024-05-12 13:14:17,666 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 277 selfloop transitions, 90 changer transitions 0/397 dead transitions. [2024-05-12 13:14:17,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 397 transitions, 5125 flow [2024-05-12 13:14:17,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 13:14:17,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 13:14:17,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 253 transitions. [2024-05-12 13:14:17,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5270833333333333 [2024-05-12 13:14:17,667 INFO L175 Difference]: Start difference. First operand has 221 places, 294 transitions, 3700 flow. Second operand 10 states and 253 transitions. [2024-05-12 13:14:17,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 397 transitions, 5125 flow [2024-05-12 13:14:18,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 397 transitions, 5052 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-05-12 13:14:18,642 INFO L231 Difference]: Finished difference. Result has 232 places, 321 transitions, 4292 flow [2024-05-12 13:14:18,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3627, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4292, PETRI_PLACES=232, PETRI_TRANSITIONS=321} [2024-05-12 13:14:18,642 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 178 predicate places. [2024-05-12 13:14:18,643 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 321 transitions, 4292 flow [2024-05-12 13:14:18,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.454545454545455) internal successors, (148), 11 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:18,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:14:18,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:14:18,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-05-12 13:14:18,643 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:14:18,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:14:18,644 INFO L85 PathProgramCache]: Analyzing trace with hash 2108441928, now seen corresponding path program 2 times [2024-05-12 13:14:18,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:14:18,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880635531] [2024-05-12 13:14:18,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:14:18,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:14:18,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:14:19,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:14:19,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:14:19,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880635531] [2024-05-12 13:14:19,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880635531] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:14:19,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:14:19,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:14:19,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848806586] [2024-05-12 13:14:19,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:14:19,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:14:19,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:14:19,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:14:19,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:14:19,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-05-12 13:14:19,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 321 transitions, 4292 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:19,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:14:19,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-05-12 13:14:19,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:14:21,513 INFO L124 PetriNetUnfolderBase]: 7823/12063 cut-off events. [2024-05-12 13:14:21,513 INFO L125 PetriNetUnfolderBase]: For 372976/372978 co-relation queries the response was YES. [2024-05-12 13:14:21,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77516 conditions, 12063 events. 7823/12063 cut-off events. For 372976/372978 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 77207 event pairs, 2108 based on Foata normal form. 8/11834 useless extension candidates. Maximal degree in co-relation 77407. Up to 10048 conditions per place. [2024-05-12 13:14:21,666 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 289 selfloop transitions, 79 changer transitions 0/376 dead transitions. [2024-05-12 13:14:21,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 376 transitions, 5630 flow [2024-05-12 13:14:21,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:14:21,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:14:21,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-05-12 13:14:21,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052083333333334 [2024-05-12 13:14:21,668 INFO L175 Difference]: Start difference. First operand has 232 places, 321 transitions, 4292 flow. Second operand 8 states and 194 transitions. [2024-05-12 13:14:21,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 376 transitions, 5630 flow [2024-05-12 13:14:22,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 376 transitions, 5512 flow, removed 49 selfloop flow, removed 2 redundant places. [2024-05-12 13:14:22,741 INFO L231 Difference]: Finished difference. Result has 239 places, 332 transitions, 4498 flow [2024-05-12 13:14:22,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4174, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4498, PETRI_PLACES=239, PETRI_TRANSITIONS=332} [2024-05-12 13:14:22,742 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 185 predicate places. [2024-05-12 13:14:22,742 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 332 transitions, 4498 flow [2024-05-12 13:14:22,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:22,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:14:22,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:14:22,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-05-12 13:14:22,743 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:14:22,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:14:22,743 INFO L85 PathProgramCache]: Analyzing trace with hash 2108430768, now seen corresponding path program 3 times [2024-05-12 13:14:22,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:14:22,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308768955] [2024-05-12 13:14:22,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:14:22,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:14:22,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:14:23,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:14:23,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:14:23,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308768955] [2024-05-12 13:14:23,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308768955] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:14:23,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:14:23,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:14:23,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496773791] [2024-05-12 13:14:23,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:14:23,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:14:23,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:14:23,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:14:23,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:14:23,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-05-12 13:14:23,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 332 transitions, 4498 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:23,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:14:23,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-05-12 13:14:23,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:14:25,629 INFO L124 PetriNetUnfolderBase]: 7811/12056 cut-off events. [2024-05-12 13:14:25,630 INFO L125 PetriNetUnfolderBase]: For 376269/376271 co-relation queries the response was YES. [2024-05-12 13:14:25,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78024 conditions, 12056 events. 7811/12056 cut-off events. For 376269/376271 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 77310 event pairs, 2117 based on Foata normal form. 8/11825 useless extension candidates. Maximal degree in co-relation 77912. Up to 10044 conditions per place. [2024-05-12 13:14:25,775 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 289 selfloop transitions, 80 changer transitions 0/377 dead transitions. [2024-05-12 13:14:25,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 377 transitions, 5625 flow [2024-05-12 13:14:25,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:14:25,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:14:25,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-05-12 13:14:25,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2024-05-12 13:14:25,777 INFO L175 Difference]: Start difference. First operand has 239 places, 332 transitions, 4498 flow. Second operand 8 states and 196 transitions. [2024-05-12 13:14:25,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 377 transitions, 5625 flow [2024-05-12 13:14:26,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 377 transitions, 5474 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-05-12 13:14:26,826 INFO L231 Difference]: Finished difference. Result has 243 places, 333 transitions, 4543 flow [2024-05-12 13:14:26,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4347, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4543, PETRI_PLACES=243, PETRI_TRANSITIONS=333} [2024-05-12 13:14:26,826 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 189 predicate places. [2024-05-12 13:14:26,827 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 333 transitions, 4543 flow [2024-05-12 13:14:26,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:26,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:14:26,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:14:26,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-05-12 13:14:26,827 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:14:26,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:14:26,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1093663287, now seen corresponding path program 2 times [2024-05-12 13:14:26,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:14:26,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421090443] [2024-05-12 13:14:26,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:14:26,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:14:26,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:14:27,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:14:27,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:14:27,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421090443] [2024-05-12 13:14:27,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421090443] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:14:27,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:14:27,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:14:27,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370578084] [2024-05-12 13:14:27,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:14:27,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:14:27,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:14:27,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:14:27,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:14:27,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-05-12 13:14:27,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 333 transitions, 4543 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:27,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:14:27,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-05-12 13:14:27,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:14:29,881 INFO L124 PetriNetUnfolderBase]: 7847/12136 cut-off events. [2024-05-12 13:14:29,881 INFO L125 PetriNetUnfolderBase]: For 384801/384803 co-relation queries the response was YES. [2024-05-12 13:14:29,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78237 conditions, 12136 events. 7847/12136 cut-off events. For 384801/384803 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 78394 event pairs, 2126 based on Foata normal form. 4/11885 useless extension candidates. Maximal degree in co-relation 78124. Up to 10880 conditions per place. [2024-05-12 13:14:30,033 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 305 selfloop transitions, 60 changer transitions 0/373 dead transitions. [2024-05-12 13:14:30,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 373 transitions, 5649 flow [2024-05-12 13:14:30,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:14:30,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:14:30,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-05-12 13:14:30,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-05-12 13:14:30,035 INFO L175 Difference]: Start difference. First operand has 243 places, 333 transitions, 4543 flow. Second operand 8 states and 184 transitions. [2024-05-12 13:14:30,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 373 transitions, 5649 flow [2024-05-12 13:14:31,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 373 transitions, 5489 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-05-12 13:14:31,243 INFO L231 Difference]: Finished difference. Result has 246 places, 337 transitions, 4560 flow [2024-05-12 13:14:31,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4383, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4560, PETRI_PLACES=246, PETRI_TRANSITIONS=337} [2024-05-12 13:14:31,243 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 192 predicate places. [2024-05-12 13:14:31,244 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 337 transitions, 4560 flow [2024-05-12 13:14:31,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:31,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:14:31,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:14:31,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-05-12 13:14:31,244 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:14:31,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:14:31,245 INFO L85 PathProgramCache]: Analyzing trace with hash 375318947, now seen corresponding path program 3 times [2024-05-12 13:14:31,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:14:31,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427346018] [2024-05-12 13:14:31,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:14:31,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:14:31,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:14:31,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:14:31,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:14:31,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427346018] [2024-05-12 13:14:31,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427346018] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:14:31,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:14:31,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:14:31,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795279979] [2024-05-12 13:14:31,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:14:31,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:14:31,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:14:31,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:14:31,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:14:31,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-05-12 13:14:31,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 337 transitions, 4560 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-05-12 13:14:31,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:14:31,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-05-12 13:14:31,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:14:34,015 INFO L124 PetriNetUnfolderBase]: 7834/12225 cut-off events. [2024-05-12 13:14:34,016 INFO L125 PetriNetUnfolderBase]: For 393175/393175 co-relation queries the response was YES. [2024-05-12 13:14:34,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77816 conditions, 12225 events. 7834/12225 cut-off events. For 393175/393175 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 79904 event pairs, 2446 based on Foata normal form. 1/11981 useless extension candidates. Maximal degree in co-relation 77702. Up to 11170 conditions per place. [2024-05-12 13:14:34,169 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 328 selfloop transitions, 29 changer transitions 0/365 dead transitions. [2024-05-12 13:14:34,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 365 transitions, 5466 flow [2024-05-12 13:14:34,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:14:34,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:14:34,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-05-12 13:14:34,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-05-12 13:14:34,170 INFO L175 Difference]: Start difference. First operand has 246 places, 337 transitions, 4560 flow. Second operand 7 states and 157 transitions. [2024-05-12 13:14:34,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 365 transitions, 5466 flow [2024-05-12 13:14:35,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 365 transitions, 5309 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-05-12 13:14:35,434 INFO L231 Difference]: Finished difference. Result has 247 places, 337 transitions, 4467 flow [2024-05-12 13:14:35,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4403, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4467, PETRI_PLACES=247, PETRI_TRANSITIONS=337} [2024-05-12 13:14:35,435 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 193 predicate places. [2024-05-12 13:14:35,435 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 337 transitions, 4467 flow [2024-05-12 13:14:35,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-05-12 13:14:35,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:14:35,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:14:35,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-05-12 13:14:35,436 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:14:35,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:14:35,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1335808477, now seen corresponding path program 4 times [2024-05-12 13:14:35,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:14:35,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120962957] [2024-05-12 13:14:35,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:14:35,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:14:35,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:14:36,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:14:36,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:14:36,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120962957] [2024-05-12 13:14:36,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120962957] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:14:36,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:14:36,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:14:36,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640898818] [2024-05-12 13:14:36,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:14:36,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:14:36,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:14:36,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:14:36,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:14:36,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-05-12 13:14:36,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 337 transitions, 4467 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-05-12 13:14:36,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:14:36,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-05-12 13:14:36,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:14:38,202 INFO L124 PetriNetUnfolderBase]: 7851/12256 cut-off events. [2024-05-12 13:14:38,202 INFO L125 PetriNetUnfolderBase]: For 402411/402411 co-relation queries the response was YES. [2024-05-12 13:14:38,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77742 conditions, 12256 events. 7851/12256 cut-off events. For 402411/402411 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 80134 event pairs, 2454 based on Foata normal form. 1/12010 useless extension candidates. Maximal degree in co-relation 77627. Up to 11224 conditions per place. [2024-05-12 13:14:38,354 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 330 selfloop transitions, 25 changer transitions 0/363 dead transitions. [2024-05-12 13:14:38,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 363 transitions, 5321 flow [2024-05-12 13:14:38,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:14:38,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:14:38,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-05-12 13:14:38,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-05-12 13:14:38,355 INFO L175 Difference]: Start difference. First operand has 247 places, 337 transitions, 4467 flow. Second operand 7 states and 151 transitions. [2024-05-12 13:14:38,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 363 transitions, 5321 flow [2024-05-12 13:14:39,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 363 transitions, 5083 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-05-12 13:14:39,534 INFO L231 Difference]: Finished difference. Result has 245 places, 341 transitions, 4369 flow [2024-05-12 13:14:39,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4249, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4369, PETRI_PLACES=245, PETRI_TRANSITIONS=341} [2024-05-12 13:14:39,534 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 191 predicate places. [2024-05-12 13:14:39,535 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 341 transitions, 4369 flow [2024-05-12 13:14:39,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-05-12 13:14:39,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:14:39,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:14:39,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-05-12 13:14:39,535 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:14:39,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:14:39,536 INFO L85 PathProgramCache]: Analyzing trace with hash 2096975327, now seen corresponding path program 2 times [2024-05-12 13:14:39,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:14:39,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287020435] [2024-05-12 13:14:39,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:14:39,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:14:39,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:14:40,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:14:40,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:14:40,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287020435] [2024-05-12 13:14:40,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287020435] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:14:40,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:14:40,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 13:14:40,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658753929] [2024-05-12 13:14:40,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:14:40,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 13:14:40,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:14:40,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 13:14:40,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-05-12 13:14:40,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-05-12 13:14:40,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 341 transitions, 4369 flow. Second operand has 11 states, 11 states have (on average 13.454545454545455) internal successors, (148), 11 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:40,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:14:40,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-05-12 13:14:40,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:14:42,958 INFO L124 PetriNetUnfolderBase]: 7640/11509 cut-off events. [2024-05-12 13:14:42,959 INFO L125 PetriNetUnfolderBase]: For 423242/423268 co-relation queries the response was YES. [2024-05-12 13:14:43,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76221 conditions, 11509 events. 7640/11509 cut-off events. For 423242/423268 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 71033 event pairs, 1432 based on Foata normal form. 24/11403 useless extension candidates. Maximal degree in co-relation 76106. Up to 9367 conditions per place. [2024-05-12 13:14:43,108 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 274 selfloop transitions, 92 changer transitions 0/398 dead transitions. [2024-05-12 13:14:43,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 398 transitions, 5416 flow [2024-05-12 13:14:43,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:14:43,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:14:43,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-05-12 13:14:43,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-05-12 13:14:43,110 INFO L175 Difference]: Start difference. First operand has 245 places, 341 transitions, 4369 flow. Second operand 8 states and 200 transitions. [2024-05-12 13:14:43,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 398 transitions, 5416 flow [2024-05-12 13:14:44,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 398 transitions, 5352 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-05-12 13:14:44,241 INFO L231 Difference]: Finished difference. Result has 250 places, 347 transitions, 4662 flow [2024-05-12 13:14:44,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4305, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4662, PETRI_PLACES=250, PETRI_TRANSITIONS=347} [2024-05-12 13:14:44,242 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 196 predicate places. [2024-05-12 13:14:44,242 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 347 transitions, 4662 flow [2024-05-12 13:14:44,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.454545454545455) internal successors, (148), 11 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:44,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:14:44,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:14:44,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-05-12 13:14:44,243 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:14:44,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:14:44,243 INFO L85 PathProgramCache]: Analyzing trace with hash -701917827, now seen corresponding path program 3 times [2024-05-12 13:14:44,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:14:44,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129286633] [2024-05-12 13:14:44,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:14:44,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:14:44,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:14:45,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:14:45,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:14:45,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129286633] [2024-05-12 13:14:45,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129286633] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:14:45,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:14:45,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:14:45,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140039965] [2024-05-12 13:14:45,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:14:45,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:14:45,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:14:45,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:14:45,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:14:45,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-05-12 13:14:45,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 347 transitions, 4662 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:45,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:14:45,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-05-12 13:14:45,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:14:47,648 INFO L124 PetriNetUnfolderBase]: 7951/11994 cut-off events. [2024-05-12 13:14:47,648 INFO L125 PetriNetUnfolderBase]: For 436368/436398 co-relation queries the response was YES. [2024-05-12 13:14:47,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80228 conditions, 11994 events. 7951/11994 cut-off events. For 436368/436398 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 74667 event pairs, 1354 based on Foata normal form. 20/11913 useless extension candidates. Maximal degree in co-relation 80111. Up to 9773 conditions per place. [2024-05-12 13:14:47,803 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 290 selfloop transitions, 93 changer transitions 0/415 dead transitions. [2024-05-12 13:14:47,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 415 transitions, 5814 flow [2024-05-12 13:14:47,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:14:47,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:14:47,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-05-12 13:14:47,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5598958333333334 [2024-05-12 13:14:47,805 INFO L175 Difference]: Start difference. First operand has 250 places, 347 transitions, 4662 flow. Second operand 8 states and 215 transitions. [2024-05-12 13:14:47,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 415 transitions, 5814 flow [2024-05-12 13:14:49,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 415 transitions, 5654 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-05-12 13:14:49,223 INFO L231 Difference]: Finished difference. Result has 255 places, 352 transitions, 4821 flow [2024-05-12 13:14:49,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4502, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4821, PETRI_PLACES=255, PETRI_TRANSITIONS=352} [2024-05-12 13:14:49,224 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 201 predicate places. [2024-05-12 13:14:49,224 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 352 transitions, 4821 flow [2024-05-12 13:14:49,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:49,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:14:49,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:14:49,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-05-12 13:14:49,224 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:14:49,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:14:49,225 INFO L85 PathProgramCache]: Analyzing trace with hash 30235069, now seen corresponding path program 4 times [2024-05-12 13:14:49,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:14:49,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948726594] [2024-05-12 13:14:49,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:14:49,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:14:49,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:14:50,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:14:50,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:14:50,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948726594] [2024-05-12 13:14:50,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948726594] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:14:50,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:14:50,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:14:50,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448695668] [2024-05-12 13:14:50,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:14:50,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:14:50,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:14:50,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:14:50,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:14:50,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-05-12 13:14:50,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 352 transitions, 4821 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:50,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:14:50,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-05-12 13:14:50,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:14:52,616 INFO L124 PetriNetUnfolderBase]: 8087/12890 cut-off events. [2024-05-12 13:14:52,617 INFO L125 PetriNetUnfolderBase]: For 440965/441059 co-relation queries the response was YES. [2024-05-12 13:14:52,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82623 conditions, 12890 events. 8087/12890 cut-off events. For 440965/441059 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 87633 event pairs, 2337 based on Foata normal form. 18/12589 useless extension candidates. Maximal degree in co-relation 82504. Up to 11149 conditions per place. [2024-05-12 13:14:52,833 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 340 selfloop transitions, 32 changer transitions 0/404 dead transitions. [2024-05-12 13:14:52,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 404 transitions, 5857 flow [2024-05-12 13:14:52,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:14:52,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:14:52,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-05-12 13:14:52,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-05-12 13:14:52,835 INFO L175 Difference]: Start difference. First operand has 255 places, 352 transitions, 4821 flow. Second operand 8 states and 192 transitions. [2024-05-12 13:14:52,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 404 transitions, 5857 flow [2024-05-12 13:14:54,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 404 transitions, 5622 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-05-12 13:14:54,356 INFO L231 Difference]: Finished difference. Result has 259 places, 357 transitions, 4805 flow [2024-05-12 13:14:54,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4588, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4805, PETRI_PLACES=259, PETRI_TRANSITIONS=357} [2024-05-12 13:14:54,357 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 205 predicate places. [2024-05-12 13:14:54,357 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 357 transitions, 4805 flow [2024-05-12 13:14:54,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:54,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:14:54,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:14:54,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-05-12 13:14:54,358 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:14:54,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:14:54,358 INFO L85 PathProgramCache]: Analyzing trace with hash -282801071, now seen corresponding path program 5 times [2024-05-12 13:14:54,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:14:54,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025969098] [2024-05-12 13:14:54,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:14:54,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:14:54,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:14:55,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:14:55,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:14:55,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025969098] [2024-05-12 13:14:55,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025969098] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:14:55,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:14:55,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:14:55,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120395095] [2024-05-12 13:14:55,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:14:55,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:14:55,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:14:55,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:14:55,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:14:55,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-05-12 13:14:55,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 357 transitions, 4805 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:55,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:14:55,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-05-12 13:14:55,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:14:57,903 INFO L124 PetriNetUnfolderBase]: 8072/12185 cut-off events. [2024-05-12 13:14:57,903 INFO L125 PetriNetUnfolderBase]: For 421080/421110 co-relation queries the response was YES. [2024-05-12 13:14:58,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80456 conditions, 12185 events. 8072/12185 cut-off events. For 421080/421110 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 76292 event pairs, 1557 based on Foata normal form. 16/12100 useless extension candidates. Maximal degree in co-relation 80334. Up to 10396 conditions per place. [2024-05-12 13:14:58,084 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 300 selfloop transitions, 83 changer transitions 0/415 dead transitions. [2024-05-12 13:14:58,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 415 transitions, 5810 flow [2024-05-12 13:14:58,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:14:58,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:14:58,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-05-12 13:14:58,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-05-12 13:14:58,087 INFO L175 Difference]: Start difference. First operand has 259 places, 357 transitions, 4805 flow. Second operand 8 states and 204 transitions. [2024-05-12 13:14:58,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 415 transitions, 5810 flow [2024-05-12 13:14:59,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 415 transitions, 5674 flow, removed 55 selfloop flow, removed 3 redundant places. [2024-05-12 13:14:59,310 INFO L231 Difference]: Finished difference. Result has 264 places, 360 transitions, 4887 flow [2024-05-12 13:14:59,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4619, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4887, PETRI_PLACES=264, PETRI_TRANSITIONS=360} [2024-05-12 13:14:59,315 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 210 predicate places. [2024-05-12 13:14:59,315 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 360 transitions, 4887 flow [2024-05-12 13:14:59,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:14:59,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:14:59,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:14:59,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-05-12 13:14:59,316 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:14:59,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:14:59,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1139321455, now seen corresponding path program 5 times [2024-05-12 13:14:59,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:14:59,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742354652] [2024-05-12 13:14:59,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:14:59,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:14:59,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:15:00,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:15:00,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:15:00,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742354652] [2024-05-12 13:15:00,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742354652] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:15:00,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:15:00,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:15:00,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641768005] [2024-05-12 13:15:00,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:15:00,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:15:00,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:15:00,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:15:00,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:15:00,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-05-12 13:15:00,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 360 transitions, 4887 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-05-12 13:15:00,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:15:00,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-05-12 13:15:00,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:15:02,352 INFO L124 PetriNetUnfolderBase]: 8386/13212 cut-off events. [2024-05-12 13:15:02,352 INFO L125 PetriNetUnfolderBase]: For 423917/423919 co-relation queries the response was YES. [2024-05-12 13:15:02,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83008 conditions, 13212 events. 8386/13212 cut-off events. For 423917/423919 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 88585 event pairs, 2681 based on Foata normal form. 4/12941 useless extension candidates. Maximal degree in co-relation 82883. Up to 11991 conditions per place. [2024-05-12 13:15:02,570 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 339 selfloop transitions, 35 changer transitions 0/382 dead transitions. [2024-05-12 13:15:02,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 382 transitions, 5819 flow [2024-05-12 13:15:02,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:15:02,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:15:02,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-05-12 13:15:02,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-05-12 13:15:02,572 INFO L175 Difference]: Start difference. First operand has 264 places, 360 transitions, 4887 flow. Second operand 7 states and 152 transitions. [2024-05-12 13:15:02,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 382 transitions, 5819 flow [2024-05-12 13:15:04,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 382 transitions, 5613 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-05-12 13:15:04,016 INFO L231 Difference]: Finished difference. Result has 266 places, 360 transitions, 4759 flow [2024-05-12 13:15:04,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4681, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4759, PETRI_PLACES=266, PETRI_TRANSITIONS=360} [2024-05-12 13:15:04,017 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 212 predicate places. [2024-05-12 13:15:04,017 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 360 transitions, 4759 flow [2024-05-12 13:15:04,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-05-12 13:15:04,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:15:04,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:15:04,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-05-12 13:15:04,018 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:15:04,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:15:04,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1432223933, now seen corresponding path program 6 times [2024-05-12 13:15:04,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:15:04,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267949015] [2024-05-12 13:15:04,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:15:04,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:15:04,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:15:04,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:15:04,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:15:04,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267949015] [2024-05-12 13:15:04,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267949015] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:15:04,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:15:04,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 13:15:04,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278305051] [2024-05-12 13:15:04,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:15:04,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 13:15:04,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:15:04,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 13:15:04,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 13:15:04,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-05-12 13:15:04,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 360 transitions, 4759 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-05-12 13:15:04,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:15:04,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-05-12 13:15:04,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:15:06,861 INFO L124 PetriNetUnfolderBase]: 8381/13193 cut-off events. [2024-05-12 13:15:06,862 INFO L125 PetriNetUnfolderBase]: For 423859/423861 co-relation queries the response was YES. [2024-05-12 13:15:07,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81869 conditions, 13193 events. 8381/13193 cut-off events. For 423859/423861 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 88415 event pairs, 2687 based on Foata normal form. 3/12924 useless extension candidates. Maximal degree in co-relation 81743. Up to 12060 conditions per place. [2024-05-12 13:15:07,074 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 346 selfloop transitions, 25 changer transitions 0/379 dead transitions. [2024-05-12 13:15:07,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 379 transitions, 5559 flow [2024-05-12 13:15:07,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 13:15:07,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 13:15:07,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-05-12 13:15:07,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-05-12 13:15:07,075 INFO L175 Difference]: Start difference. First operand has 266 places, 360 transitions, 4759 flow. Second operand 7 states and 147 transitions. [2024-05-12 13:15:07,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 379 transitions, 5559 flow [2024-05-12 13:15:08,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 379 transitions, 5493 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-05-12 13:15:08,702 INFO L231 Difference]: Finished difference. Result has 269 places, 360 transitions, 4749 flow [2024-05-12 13:15:08,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4693, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4749, PETRI_PLACES=269, PETRI_TRANSITIONS=360} [2024-05-12 13:15:08,703 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 215 predicate places. [2024-05-12 13:15:08,703 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 360 transitions, 4749 flow [2024-05-12 13:15:08,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-05-12 13:15:08,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:15:08,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:15:08,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-05-12 13:15:08,703 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:15:08,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:15:08,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1438864040, now seen corresponding path program 4 times [2024-05-12 13:15:08,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:15:08,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869171879] [2024-05-12 13:15:08,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:15:08,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:15:08,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:15:09,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:15:09,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:15:09,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869171879] [2024-05-12 13:15:09,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869171879] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:15:09,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:15:09,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 13:15:09,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970084697] [2024-05-12 13:15:09,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:15:09,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 13:15:09,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:15:09,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 13:15:09,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-05-12 13:15:09,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-05-12 13:15:09,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 360 transitions, 4749 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:09,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:15:09,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-05-12 13:15:09,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:15:12,521 INFO L124 PetriNetUnfolderBase]: 8483/13343 cut-off events. [2024-05-12 13:15:12,522 INFO L125 PetriNetUnfolderBase]: For 446037/446039 co-relation queries the response was YES. [2024-05-12 13:15:12,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82850 conditions, 13343 events. 8483/13343 cut-off events. For 446037/446039 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 89474 event pairs, 2629 based on Foata normal form. 8/13075 useless extension candidates. Maximal degree in co-relation 82723. Up to 11670 conditions per place. [2024-05-12 13:15:12,681 INFO L140 encePairwiseOnDemand]: 34/48 looper letters, 332 selfloop transitions, 58 changer transitions 0/398 dead transitions. [2024-05-12 13:15:12,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 398 transitions, 5935 flow [2024-05-12 13:15:12,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 13:15:12,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 13:15:12,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-05-12 13:15:12,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44907407407407407 [2024-05-12 13:15:12,682 INFO L175 Difference]: Start difference. First operand has 269 places, 360 transitions, 4749 flow. Second operand 9 states and 194 transitions. [2024-05-12 13:15:12,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 398 transitions, 5935 flow [2024-05-12 13:15:13,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 398 transitions, 5835 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-05-12 13:15:13,812 INFO L231 Difference]: Finished difference. Result has 270 places, 364 transitions, 4830 flow [2024-05-12 13:15:13,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4649, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4830, PETRI_PLACES=270, PETRI_TRANSITIONS=364} [2024-05-12 13:15:13,812 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 216 predicate places. [2024-05-12 13:15:13,812 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 364 transitions, 4830 flow [2024-05-12 13:15:13,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:13,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:15:13,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:15:13,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-05-12 13:15:13,813 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:15:13,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:15:13,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1438864381, now seen corresponding path program 3 times [2024-05-12 13:15:13,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:15:13,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849456445] [2024-05-12 13:15:13,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:15:13,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:15:13,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:15:14,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:15:14,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:15:14,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849456445] [2024-05-12 13:15:14,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849456445] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:15:14,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:15:14,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:15:14,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312233117] [2024-05-12 13:15:14,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:15:14,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:15:14,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:15:14,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:15:14,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:15:14,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-05-12 13:15:14,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 364 transitions, 4830 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:14,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:15:14,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-05-12 13:15:14,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:15:17,106 INFO L124 PetriNetUnfolderBase]: 8512/13388 cut-off events. [2024-05-12 13:15:17,107 INFO L125 PetriNetUnfolderBase]: For 449879/449881 co-relation queries the response was YES. [2024-05-12 13:15:17,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83803 conditions, 13388 events. 8512/13388 cut-off events. For 449879/449881 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 89765 event pairs, 2610 based on Foata normal form. 4/13116 useless extension candidates. Maximal degree in co-relation 83675. Up to 12100 conditions per place. [2024-05-12 13:15:17,329 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 337 selfloop transitions, 61 changer transitions 0/406 dead transitions. [2024-05-12 13:15:17,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 406 transitions, 5993 flow [2024-05-12 13:15:17,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:15:17,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:15:17,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-05-12 13:15:17,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4505208333333333 [2024-05-12 13:15:17,330 INFO L175 Difference]: Start difference. First operand has 270 places, 364 transitions, 4830 flow. Second operand 8 states and 173 transitions. [2024-05-12 13:15:17,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 406 transitions, 5993 flow [2024-05-12 13:15:19,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 406 transitions, 5741 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-05-12 13:15:19,114 INFO L231 Difference]: Finished difference. Result has 272 places, 377 transitions, 4994 flow [2024-05-12 13:15:19,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4578, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4994, PETRI_PLACES=272, PETRI_TRANSITIONS=377} [2024-05-12 13:15:19,114 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 218 predicate places. [2024-05-12 13:15:19,114 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 377 transitions, 4994 flow [2024-05-12 13:15:19,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:19,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:15:19,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:15:19,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-05-12 13:15:19,115 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:15:19,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:15:19,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1424597437, now seen corresponding path program 1 times [2024-05-12 13:15:19,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:15:19,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800398679] [2024-05-12 13:15:19,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:15:19,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:15:19,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:15:20,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:15:20,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:15:20,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800398679] [2024-05-12 13:15:20,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800398679] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:15:20,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:15:20,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:15:20,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234103896] [2024-05-12 13:15:20,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:15:20,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:15:20,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:15:20,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:15:20,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:15:20,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-05-12 13:15:20,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 377 transitions, 4994 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:20,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:15:20,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-05-12 13:15:20,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:15:22,732 INFO L124 PetriNetUnfolderBase]: 8516/13391 cut-off events. [2024-05-12 13:15:22,732 INFO L125 PetriNetUnfolderBase]: For 469112/469112 co-relation queries the response was YES. [2024-05-12 13:15:22,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84767 conditions, 13391 events. 8516/13391 cut-off events. For 469112/469112 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 89752 event pairs, 2639 based on Foata normal form. 2/13116 useless extension candidates. Maximal degree in co-relation 84638. Up to 12214 conditions per place. [2024-05-12 13:15:23,257 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 377 selfloop transitions, 27 changer transitions 0/412 dead transitions. [2024-05-12 13:15:23,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 412 transitions, 5991 flow [2024-05-12 13:15:23,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:15:23,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:15:23,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-05-12 13:15:23,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4401041666666667 [2024-05-12 13:15:23,259 INFO L175 Difference]: Start difference. First operand has 272 places, 377 transitions, 4994 flow. Second operand 8 states and 169 transitions. [2024-05-12 13:15:23,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 412 transitions, 5991 flow [2024-05-12 13:15:24,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 412 transitions, 5799 flow, removed 79 selfloop flow, removed 3 redundant places. [2024-05-12 13:15:24,770 INFO L231 Difference]: Finished difference. Result has 278 places, 383 transitions, 4973 flow [2024-05-12 13:15:24,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4802, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4973, PETRI_PLACES=278, PETRI_TRANSITIONS=383} [2024-05-12 13:15:24,771 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 224 predicate places. [2024-05-12 13:15:24,771 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 383 transitions, 4973 flow [2024-05-12 13:15:24,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:24,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:15:24,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:15:24,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-05-12 13:15:24,772 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:15:24,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:15:24,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1018110608, now seen corresponding path program 5 times [2024-05-12 13:15:24,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:15:24,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329430354] [2024-05-12 13:15:24,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:15:24,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:15:24,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:15:25,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:15:25,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:15:25,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329430354] [2024-05-12 13:15:25,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329430354] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:15:25,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:15:25,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:15:25,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197632855] [2024-05-12 13:15:25,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:15:25,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:15:25,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:15:25,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:15:25,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:15:25,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-05-12 13:15:25,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 383 transitions, 4973 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:25,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:15:25,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-05-12 13:15:25,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:15:28,561 INFO L124 PetriNetUnfolderBase]: 8744/13715 cut-off events. [2024-05-12 13:15:28,562 INFO L125 PetriNetUnfolderBase]: For 500745/500747 co-relation queries the response was YES. [2024-05-12 13:15:28,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87663 conditions, 13715 events. 8744/13715 cut-off events. For 500745/500747 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 92088 event pairs, 2719 based on Foata normal form. 8/13445 useless extension candidates. Maximal degree in co-relation 87531. Up to 11867 conditions per place. [2024-05-12 13:15:28,738 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 357 selfloop transitions, 60 changer transitions 0/425 dead transitions. [2024-05-12 13:15:28,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 425 transitions, 6275 flow [2024-05-12 13:15:28,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:15:28,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:15:28,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-05-12 13:15:28,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4739583333333333 [2024-05-12 13:15:28,740 INFO L175 Difference]: Start difference. First operand has 278 places, 383 transitions, 4973 flow. Second operand 8 states and 182 transitions. [2024-05-12 13:15:28,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 425 transitions, 6275 flow [2024-05-12 13:15:30,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 425 transitions, 6161 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-05-12 13:15:30,334 INFO L231 Difference]: Finished difference. Result has 282 places, 391 transitions, 5108 flow [2024-05-12 13:15:30,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4859, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5108, PETRI_PLACES=282, PETRI_TRANSITIONS=391} [2024-05-12 13:15:30,335 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 228 predicate places. [2024-05-12 13:15:30,335 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 391 transitions, 5108 flow [2024-05-12 13:15:30,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:30,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:15:30,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:15:30,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-05-12 13:15:30,336 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:15:30,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:15:30,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1425072140, now seen corresponding path program 6 times [2024-05-12 13:15:30,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:15:30,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167690313] [2024-05-12 13:15:30,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:15:30,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:15:30,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:15:31,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:15:31,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:15:31,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167690313] [2024-05-12 13:15:31,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167690313] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:15:31,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:15:31,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:15:31,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357149715] [2024-05-12 13:15:31,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:15:31,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:15:31,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:15:31,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:15:31,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:15:31,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-05-12 13:15:31,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 391 transitions, 5108 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:31,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:15:31,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-05-12 13:15:31,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:15:34,472 INFO L124 PetriNetUnfolderBase]: 8732/13713 cut-off events. [2024-05-12 13:15:34,473 INFO L125 PetriNetUnfolderBase]: For 505487/505489 co-relation queries the response was YES. [2024-05-12 13:15:34,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87935 conditions, 13713 events. 8732/13713 cut-off events. For 505487/505489 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 92191 event pairs, 2730 based on Foata normal form. 8/13439 useless extension candidates. Maximal degree in co-relation 87801. Up to 12282 conditions per place. [2024-05-12 13:15:34,638 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 370 selfloop transitions, 42 changer transitions 0/420 dead transitions. [2024-05-12 13:15:34,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 420 transitions, 6154 flow [2024-05-12 13:15:34,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:15:34,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:15:34,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-05-12 13:15:34,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557291666666667 [2024-05-12 13:15:34,639 INFO L175 Difference]: Start difference. First operand has 282 places, 391 transitions, 5108 flow. Second operand 8 states and 175 transitions. [2024-05-12 13:15:34,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 420 transitions, 6154 flow [2024-05-12 13:15:36,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 420 transitions, 6016 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-05-12 13:15:36,162 INFO L231 Difference]: Finished difference. Result has 286 places, 391 transitions, 5062 flow [2024-05-12 13:15:36,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4970, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5062, PETRI_PLACES=286, PETRI_TRANSITIONS=391} [2024-05-12 13:15:36,163 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 232 predicate places. [2024-05-12 13:15:36,163 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 391 transitions, 5062 flow [2024-05-12 13:15:36,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:36,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:15:36,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:15:36,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-05-12 13:15:36,164 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:15:36,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:15:36,164 INFO L85 PathProgramCache]: Analyzing trace with hash -531491385, now seen corresponding path program 1 times [2024-05-12 13:15:36,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:15:36,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162183224] [2024-05-12 13:15:36,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:15:36,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:15:36,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:15:37,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:15:37,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:15:37,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162183224] [2024-05-12 13:15:37,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162183224] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:15:37,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:15:37,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:15:37,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855095820] [2024-05-12 13:15:37,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:15:37,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:15:37,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:15:37,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:15:37,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:15:37,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-05-12 13:15:37,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 391 transitions, 5062 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:37,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:15:37,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-05-12 13:15:37,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:15:40,128 INFO L124 PetriNetUnfolderBase]: 8834/13855 cut-off events. [2024-05-12 13:15:40,129 INFO L125 PetriNetUnfolderBase]: For 517845/517845 co-relation queries the response was YES. [2024-05-12 13:15:40,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88213 conditions, 13855 events. 8834/13855 cut-off events. For 517845/517845 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 93184 event pairs, 2714 based on Foata normal form. 6/13576 useless extension candidates. Maximal degree in co-relation 88078. Up to 12555 conditions per place. [2024-05-12 13:15:40,313 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 395 selfloop transitions, 29 changer transitions 0/432 dead transitions. [2024-05-12 13:15:40,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 432 transitions, 6080 flow [2024-05-12 13:15:40,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:15:40,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:15:40,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-05-12 13:15:40,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4635416666666667 [2024-05-12 13:15:40,315 INFO L175 Difference]: Start difference. First operand has 286 places, 391 transitions, 5062 flow. Second operand 8 states and 178 transitions. [2024-05-12 13:15:40,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 432 transitions, 6080 flow [2024-05-12 13:15:41,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 432 transitions, 5918 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-05-12 13:15:41,793 INFO L231 Difference]: Finished difference. Result has 286 places, 394 transitions, 5012 flow [2024-05-12 13:15:41,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4900, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5012, PETRI_PLACES=286, PETRI_TRANSITIONS=394} [2024-05-12 13:15:41,794 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 232 predicate places. [2024-05-12 13:15:41,795 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 394 transitions, 5012 flow [2024-05-12 13:15:41,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:41,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:15:41,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:15:41,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-05-12 13:15:41,795 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:15:41,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:15:41,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1335793845, now seen corresponding path program 2 times [2024-05-12 13:15:41,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:15:41,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371483596] [2024-05-12 13:15:41,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:15:41,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:15:41,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:15:42,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:15:42,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:15:42,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371483596] [2024-05-12 13:15:42,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371483596] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:15:42,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:15:42,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:15:42,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408701547] [2024-05-12 13:15:42,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:15:42,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:15:42,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:15:42,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:15:42,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:15:42,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-05-12 13:15:42,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 394 transitions, 5012 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:42,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:15:42,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-05-12 13:15:42,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:15:46,113 INFO L124 PetriNetUnfolderBase]: 9056/14189 cut-off events. [2024-05-12 13:15:46,113 INFO L125 PetriNetUnfolderBase]: For 546794/546794 co-relation queries the response was YES. [2024-05-12 13:15:46,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90916 conditions, 14189 events. 9056/14189 cut-off events. For 546794/546794 co-relation queries the response was YES. Maximal size of possible extension queue 630. Compared 95609 event pairs, 2669 based on Foata normal form. 6/13902 useless extension candidates. Maximal degree in co-relation 90781. Up to 12314 conditions per place. [2024-05-12 13:15:46,307 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 376 selfloop transitions, 67 changer transitions 0/451 dead transitions. [2024-05-12 13:15:46,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 451 transitions, 6500 flow [2024-05-12 13:15:46,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:15:46,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:15:46,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-05-12 13:15:46,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4973958333333333 [2024-05-12 13:15:46,309 INFO L175 Difference]: Start difference. First operand has 286 places, 394 transitions, 5012 flow. Second operand 8 states and 191 transitions. [2024-05-12 13:15:46,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 451 transitions, 6500 flow [2024-05-12 13:15:47,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 451 transitions, 6412 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-05-12 13:15:47,890 INFO L231 Difference]: Finished difference. Result has 288 places, 403 transitions, 5215 flow [2024-05-12 13:15:47,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4924, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5215, PETRI_PLACES=288, PETRI_TRANSITIONS=403} [2024-05-12 13:15:47,891 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 234 predicate places. [2024-05-12 13:15:47,891 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 403 transitions, 5215 flow [2024-05-12 13:15:47,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:47,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:15:47,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:15:47,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-05-12 13:15:47,892 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:15:47,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:15:47,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1335799425, now seen corresponding path program 3 times [2024-05-12 13:15:47,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:15:47,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806044221] [2024-05-12 13:15:47,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:15:47,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:15:47,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:15:48,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:15:48,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:15:48,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806044221] [2024-05-12 13:15:48,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806044221] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:15:48,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:15:48,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:15:48,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323428419] [2024-05-12 13:15:48,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:15:48,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:15:48,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:15:48,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:15:48,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:15:48,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-05-12 13:15:48,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 403 transitions, 5215 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:48,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:15:48,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-05-12 13:15:48,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:15:52,172 INFO L124 PetriNetUnfolderBase]: 9038/14207 cut-off events. [2024-05-12 13:15:52,173 INFO L125 PetriNetUnfolderBase]: For 553440/553440 co-relation queries the response was YES. [2024-05-12 13:15:52,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91433 conditions, 14207 events. 9038/14207 cut-off events. For 553440/553440 co-relation queries the response was YES. Maximal size of possible extension queue 634. Compared 96218 event pairs, 2681 based on Foata normal form. 6/13908 useless extension candidates. Maximal degree in co-relation 91297. Up to 12303 conditions per place. [2024-05-12 13:15:52,349 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 378 selfloop transitions, 66 changer transitions 0/452 dead transitions. [2024-05-12 13:15:52,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 452 transitions, 6451 flow [2024-05-12 13:15:52,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:15:52,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:15:52,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-05-12 13:15:52,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5026041666666666 [2024-05-12 13:15:52,350 INFO L175 Difference]: Start difference. First operand has 288 places, 403 transitions, 5215 flow. Second operand 8 states and 193 transitions. [2024-05-12 13:15:52,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 452 transitions, 6451 flow [2024-05-12 13:15:53,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 452 transitions, 6347 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-05-12 13:15:53,976 INFO L231 Difference]: Finished difference. Result has 293 places, 403 transitions, 5249 flow [2024-05-12 13:15:53,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5111, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5249, PETRI_PLACES=293, PETRI_TRANSITIONS=403} [2024-05-12 13:15:53,976 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 239 predicate places. [2024-05-12 13:15:53,976 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 403 transitions, 5249 flow [2024-05-12 13:15:53,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:53,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:15:53,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:15:53,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-05-12 13:15:53,977 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:15:53,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:15:53,977 INFO L85 PathProgramCache]: Analyzing trace with hash 286944949, now seen corresponding path program 4 times [2024-05-12 13:15:53,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:15:53,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111343296] [2024-05-12 13:15:53,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:15:53,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:15:53,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:15:54,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:15:54,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:15:54,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111343296] [2024-05-12 13:15:54,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111343296] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:15:54,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:15:54,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:15:54,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992735358] [2024-05-12 13:15:54,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:15:54,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:15:54,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:15:54,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:15:54,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:15:54,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-05-12 13:15:54,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 403 transitions, 5249 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:54,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:15:54,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-05-12 13:15:54,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:15:58,212 INFO L124 PetriNetUnfolderBase]: 9140/14393 cut-off events. [2024-05-12 13:15:58,212 INFO L125 PetriNetUnfolderBase]: For 567679/567681 co-relation queries the response was YES. [2024-05-12 13:15:58,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92482 conditions, 14393 events. 9140/14393 cut-off events. For 567679/567681 co-relation queries the response was YES. Maximal size of possible extension queue 640. Compared 97791 event pairs, 2677 based on Foata normal form. 6/14086 useless extension candidates. Maximal degree in co-relation 92344. Up to 12369 conditions per place. [2024-05-12 13:15:58,413 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 367 selfloop transitions, 73 changer transitions 0/448 dead transitions. [2024-05-12 13:15:58,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 448 transitions, 6499 flow [2024-05-12 13:15:58,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:15:58,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:15:58,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-05-12 13:15:58,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-05-12 13:15:58,414 INFO L175 Difference]: Start difference. First operand has 293 places, 403 transitions, 5249 flow. Second operand 8 states and 184 transitions. [2024-05-12 13:15:58,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 448 transitions, 6499 flow [2024-05-12 13:15:59,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 448 transitions, 6373 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-05-12 13:15:59,944 INFO L231 Difference]: Finished difference. Result has 295 places, 406 transitions, 5334 flow [2024-05-12 13:15:59,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5126, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5334, PETRI_PLACES=295, PETRI_TRANSITIONS=406} [2024-05-12 13:15:59,944 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 241 predicate places. [2024-05-12 13:15:59,945 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 406 transitions, 5334 flow [2024-05-12 13:15:59,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:15:59,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:15:59,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:15:59,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-05-12 13:15:59,945 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:15:59,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:15:59,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1432209301, now seen corresponding path program 5 times [2024-05-12 13:15:59,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:15:59,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091461516] [2024-05-12 13:15:59,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:15:59,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:15:59,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:16:00,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:16:00,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:16:00,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091461516] [2024-05-12 13:16:00,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091461516] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:16:00,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:16:00,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:16:00,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949556090] [2024-05-12 13:16:00,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:16:00,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:16:00,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:16:00,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:16:00,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:16:00,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-05-12 13:16:00,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 406 transitions, 5334 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:16:00,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:16:00,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-05-12 13:16:00,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 13:16:04,010 INFO L124 PetriNetUnfolderBase]: 9242/14531 cut-off events. [2024-05-12 13:16:04,010 INFO L125 PetriNetUnfolderBase]: For 586975/586977 co-relation queries the response was YES. [2024-05-12 13:16:04,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93698 conditions, 14531 events. 9242/14531 cut-off events. For 586975/586977 co-relation queries the response was YES. Maximal size of possible extension queue 645. Compared 98769 event pairs, 2702 based on Foata normal form. 6/14224 useless extension candidates. Maximal degree in co-relation 93559. Up to 12435 conditions per place. [2024-05-12 13:16:04,450 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 376 selfloop transitions, 72 changer transitions 0/456 dead transitions. [2024-05-12 13:16:04,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 456 transitions, 6633 flow [2024-05-12 13:16:04,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 13:16:04,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 13:16:04,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-05-12 13:16:04,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4921875 [2024-05-12 13:16:04,452 INFO L175 Difference]: Start difference. First operand has 295 places, 406 transitions, 5334 flow. Second operand 8 states and 189 transitions. [2024-05-12 13:16:04,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 456 transitions, 6633 flow [2024-05-12 13:16:06,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 456 transitions, 6465 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-05-12 13:16:06,251 INFO L231 Difference]: Finished difference. Result has 298 places, 409 transitions, 5378 flow [2024-05-12 13:16:06,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5179, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5378, PETRI_PLACES=298, PETRI_TRANSITIONS=409} [2024-05-12 13:16:06,251 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 244 predicate places. [2024-05-12 13:16:06,252 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 409 transitions, 5378 flow [2024-05-12 13:16:06,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:16:06,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 13:16:06,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 13:16:06,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-05-12 13:16:06,252 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 13:16:06,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 13:16:06,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1432214881, now seen corresponding path program 6 times [2024-05-12 13:16:06,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 13:16:06,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496296864] [2024-05-12 13:16:06,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 13:16:06,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 13:16:06,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 13:16:07,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 13:16:07,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 13:16:07,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496296864] [2024-05-12 13:16:07,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496296864] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 13:16:07,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 13:16:07,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 13:16:07,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531523420] [2024-05-12 13:16:07,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 13:16:07,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 13:16:07,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 13:16:07,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 13:16:07,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 13:16:07,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-05-12 13:16:07,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 409 transitions, 5378 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 13:16:07,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 13:16:07,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-05-12 13:16:07,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand